Answer:
Explanation:
g
Answer: 0.87m
Explanation: 100 centimeters equal to 1 meter or one centimeter equal to one-hundredth
3. Terrell drops an egg off of the top of Street Academy. How fast will the egg be going
after 2 seconds if it hasn't hit the ground yet?
The egg is traveling at least at a speed due to gravity of 20 m/s.
The force of gravity causes items to fall toward the ground. The force of gravity accelerates items as they descend to the ground. Velocity is a measure of the speed and direction of motion, and acceleration is a change in velocity. The longer an object is in free fall, the faster it descends toward the ground due to gravity.
In actuality, an object's velocity rises by 9.8 m/s2, so it reaches 9.8 m/s by the time it begins to fall. By the time it has been falling for 2 seconds (9.8 m/s plus 9.8 m/s), it is moving at 19.6 m/s, and so on.
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what is the mass of an object that requires 15.0N to accelrate it at rate of 3 m/s2
i need the givens and equation
The mass of an object that requires 15.0N to accelerate it at rate of 3 m/s² is 1.17 kg.
What is the mass of an object that requires 15.0N to accelerate it at rate of 3 m/s²?The mass of an object is the quantity of matter present in an object.
The mass of an object is related to its acceleration and the applied force by the given formula below:
force = mass * acceleration
mass = force/acceleration
From the data provided:
force applied = 15.0 N
acceleration = 3 m/s²
The force applied overcomes the weight of the body.
Total force applied = weight + net force
Total force = mg + ma
Total force = m(g + a)
m = force/(g + a)
mass = 15(9.8 + 3)
m = 1.17 kg
Therefore, the mass of the object is 1.17 kg.
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find the magnitude and direction of this vector
Answer:
(174^2 + 88.4^2)^1/2 = 195 m magnitude of resultant vector
(tan θ = 88.4 / 174 = .508 or 26.9 deg)
different rose bushes are grown in a greenhouse for two months the number of flowers on each bushes is counted at the end of the experiment what is the independent dependent and control variable
The independent variable is the type of rose, and the dependent variable is the quantity of flowers.
What is independent variable?In mathematical modelling, statistical modelling, and experimental sciences, there are dependent and independent variables. Dependent variables get their name because, during an experiment, their values are investigated under the presumption or requirement that they are dependent on the values of other variables due to some law or rule.
Consider what is being recorded first in order to identify the variables; in this situation, it would be the variety and quantity of roses cultivated.
Asking yourself which one depends on which other will help you distinguish between which is reliant and which is independent.
Is it more likely that the number of flowers determines the type of rose?
Or does the type of rose affect how many blossoms are present?
Saying that a rose's kind depends on how many blossoms it has is illogical.
However, it does make sense to state that the type of rose affects how many blossoms are there.
As a result, the independent variable is the type of rose, and the dependent variable is the quantity of flowers.
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What should you do every time you exercise?
A.
Warm up
B.
Drink plenty of water
C.
Stretch
D.
All of the above
Answer:
D. All of the above
Explanation:
Because it's the most logical answer.
upiter has a mass of approximately . jupiter’s moon ganymede has a mass of approximately and it orbits jupiter at a distance of approximately . calculate the approximate magnitude of the attractive gravitational force between ganymede and jupiter.
The approximate magnitude of the attractive gravitational force between ganymede and jupiter is 16.35 x 10^21 N .
According to Newton’s Law of Gravitation, the gravitational force between two bodies is directly proportional to the masses of the two objects and is inversely proportional to the square of the distance between them.
The above statement can be represented by the following equation:
F = Gx (m1)x (m2)/r^2
Here G = Universal Gravitational Constant = 6.67 x 10^-11 N m^2/kg^2
m1 and m2 are the masses of two bodies
r is the distance between the bodies
Putting m1= Mass of Jupiter= 1.89 x 10^27 kg
m2 =Mass of Ganymede 1.48 x 10^23 kg
r = Distance between Jupiter and Ganymede = 1.07 x 10^9 meters
F = 6.67 x 10^-11 x 1.89 x 10^27 x 1.48 x 10^23/(1.07 x 10^9)^2
On solving the above equation F comes out to be 16.35 x 10^21 N.
Thus, the approximate magnitude of the gravitational force between Ganymede and Jupiter is 16.35 x 10^21 N.
What is gravitational force?Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive. In actuality, every thing in the cosmos, including you, is pulling on every other object.
Gravitation is the force in physics that draws two masses together. Unbelievably, every single particle of matter in the cosmos attracts every other particle through gravity. The phrases gravitation and gravity are sometimes used synonymously to refer to the attraction that exists between anything with mass or energy.
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a sled is initially moving on a straight track at 3.5 m/s. what is its velocity two seconds later, if the sled's recorded acceleration is 2.0 (m/s)/s?
A sled is initially moving on a straight track at 3.5 m/s. The final velocity of the sled will be 3.75m/s. When the acceleration is 2.0 m/s².
What is acceleration?The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations. The direction of the net force applied on an item determines the direction of its acceleration.
Given parameters:
Initial velocity = 3.5m/s
Final velocity = ?
Time taken = 2s
acceleration = 2m/s²
[tex]a = v_f - v_i/t[/tex]
2 = x - 3.5/2
x = 3.75 m/s
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I tried to solve this, not sure what I did wrong, nor what the question is actually asking for
In cartesian coordinates, we can write the position vectors as-
a) → r = 12.4 m , θ = 170° ↔ - 12.21 i + 2.15 j
b) → r = 4 cm , θ = 50° ↔ 2.57 i + 3.06 j
c) → r = 20 inches , θ = 210° ↔ - 17.32 i - 10 j
What are polar coordinates?It is two-dimensional coordinate system which uses a straight line distance (from a reference point) and the angle made by it (with respect to reference direction) to represent a point in the X-Y plane.
Given are the position vectors in polar coordinates of three points in X-Y coordinate system.
The transformation from polar coordinates (r, θ) into cartesian coordinates (x, y) is done using the following formulae -
x = r cosθ
y = r sinθ
a) → r = 12.4 m , θ = 170°
x = 12.4 x cos (170°) = 12.4 x -0.98480775301 = -12 .21
y = 12.4 x sin (170°) = 12.4 x 0.17364817766 = 2.15
In cartesian form → ( -12.21 i + 2.15 j )
b) → r = 4 cm , θ = 50°
x = 4 x cos (50°) = 4 x 0.64278760968 = 2.57
y = 4 x sin (170°) = 4 x 0.76604444311 = 3.06
In cartesian form → ( 2.57 i + 3.06 j )
c) → r = 20 inches , θ = 210°
x = 20 x cos (210°) = 20 x -0.86602540378 = -17.32
y = 20 x sin (210°) = 20 x -0.5= -10
In cartesian form → ( -17.32 i - 10 j )
Therefore, in cartesian coordinates, we can write the position vectors as -
a) → r = 12.4 m , θ = 170° ↔ - 12.21 i + 2.15 j
b) → r = 4 cm , θ = 50° ↔ 2.57 i + 3.06 j
c) → r = 20 inches , θ = 210° ↔ - 17.32 i - 10 j
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By what factor does the rate constant increase when the temperature increases from 200. k to 400. k for a reaction with an activation energy of 845 j/mol?
The rate constant increases by a factor of 1.3 when the temperature increases from 200k to 400k for a reaction with an activation energy of 845 j/mol.
Calculationln k2/k1 = 845/8.314 (1/200 - 1/400)
ln k2/k1 = 0.254
k2/k1 = 1.3
How are k1 and k2 the rate constants determined?The Arrhenius equation, which has the form lnk=RE(T1T1), relates the activation energy (Ea) and rate constants (k1 and k2) of a chemical process at two distinct temperatures (T1 and T2).
Where T1 and T2 are the temperatures of rates k1 and k2 (respectively) in K, k1 and k2 are rate constants, Ea is the activation energy in J/mol, and R is the gas constant which has a value of 8.314 J/K mol.
The activation energies employed were 20.1 kJ/mol and 59.8 kJ/mol.
K1 and K2 are what temperature?The rate constants K1 and K2 are 1016 e-2000/T and 1015 e-1000/T, respectively, for two distinct reactions.
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a car starting from rest
moves with a uniform acceleration of 6ms^-2. The distance its covers in the fourth seconds of its motion is
The correct answer is 21 m.
The term "uniformly accelerated motion" refers to a body or object moving at a consistent rate of acceleration. The absence of velocity does not imply constant acceleration. Therefore, if a body is in motion such that the amount of change in its velocity in equally spaced time intervals will be constant, then that is what is meant by uniform acceleration or uniform acceleration definition.
Given initial velocity = 0 m/s
acceleration = 6 m/s^2
The body's movement in nth seconds in terms of distance,
S_n = u + a/2 (2n-1)
S_4 = 0 + 6/2 ( 2 × 4 - 1 )
S_4 = 3 ( 8 -1 )
S_4 = 3 × 7
S_4 = 21 m
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Give an example of what it means to say mass and weight are proportional to each other?.
The example of mass and weight being proportional is Force = mass * acceleration.
The proportionality can be direct or inverse proportionality.
Direct proportionality can be defined as the increase in the second quantity if there is an increase in the first quantity when both quantities are related.
Inverse proportionality can be defined as a decrease in the second quantity when the first quantity is increased when both quantities are related.
Mass and weight are proportional to each other.
For that we can consider the example given below:
weight is the force exerted by the earth's gravity on the particle.
we know that
force = Mass * acceleration
as weight = force
weight = mass * acceleration
so if the acceleration is constant the increasing weight mass also increases.
so at constant acceleration weight and mass are directly proportional.
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What did you include in your response? check all that apply. the law of conservation of momentum is satisfied. the momentum before the collision is 1.5 kg • . the momentum after the collision is 1.5 kg • . the momentum is the same after the collision as it was before the collision.
After a collision, there is no change in the momentum from the initial situation. This statement satisfies the law of conservation of momentum. Hence, Option D is correct.
What is the law of conservation of Momentum?Momentum is the sum of an object's mass and velocity, and it is a property of all moving objects. This can be expressed mathematically as p=MV, where p stands for momentum. The momentum of an object can fluctuate because its velocity can. When describing the momentum of a system of objects, the Law of Conservation of Momentum is helpful. The Law of Conservation of Momentum, in its most basic form, states that the total momentum of an isolated system stays constant.
Hence, the momentum will be the same after the collision as it was before the collision.
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The gravitational field on the surface of the earth is stronger than that on the surface of the moon. If a rock is transported from the moon to the earth, which properties of the rock change?.
The property of the rock that will change if it is transported from the moon to the earth, is the weight.
The weight of an object is directly proportional to the action of gravity on the mass of that object. It can be confirmed with the weight formula:
W = m * g
Where:
W = weightm = massg = gravityBy contrast, the mass of an object indicates the amount of matter it contains, it is a constant magnitude.
What is weight?It is the physical magnitude that expresses the force exerted by gravity on the mass of a body, this is expressed in units of the international system in Newton.
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What is the distance traveled by the red ball between 12s and 24
The distance the red ball travelled between 12 s and 24 s is 2116.8 m
What is free fall?Free fall is motion under gravity.
What is the distance traveled by the red ball between 12s and 24If we assume the red ball is falling freely, it has an initial velocity of zero.
Using the equation of motion s = ut - 1/2gt², we find the distance it travels or height it drops after the given time. where
u = initial velocity = 0 m/s, t = time and g = accleration due to gravity = 9.8 m/s²So, s = ut - 1/2gt²
s = 0 × t - 1/2gt²
s = -1/2gt²
Distance the red ball fall in 12 s.Since the distance the red ball falls is s = -1/2gt² with t = 12 s, we have
s = -1/2gt²
= -1/2 × 9.8 m/s² × (12 s)²
= -1/2 × 9.8 m/s² × 144 s²
= -4.9 m/s² × 144 s²
= -705.6 m
Distance the red ball fall in 24 s.Since the distance the red ball falls is s = -1/2gt² with t = 24 s, we have
s' = -1/2gt²
= -1/2 × 9.8 m/s² × (24 s)²
= -1/2 × 9.8 m/s² × 576 s²
= -4.9 m/s² × 576 s²
= -2822.4 m
So, the distance the red ball travelled between 12 s and 24 s is d = s' - s
= -2822.4 m - (-705.6 m)
= -2822.4 m + 705.6 m
= -2116.8 m
So, the distance the red ball travelled between 12 s and 24 s is 2116.8 m
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The continuous circular motion of the wind (air mass) between the equatorial low pressure belt and the subtropical high pressure belts is known as __________
The continuous circular motion of the wind (air mass) between the equatorial low pressure belt and the subtropical high pressure belts is known as Trade winds
These winds helps ships to travel west. It also steers hurricanes. These winds are air currents that are closer to the Earth's surface. These winds start as warm air from equator and as it travels to polar regions it gets cooler. Trade winds can be found 30 degrees North and South of the equator.
The subtropical high pressure belts extends from 35 degrees North and South of the equator. It is also called as Horse latitude. The equatorial low pressure belt is the area where the trade winds from Horse latitudes of both hemispheres converges.
Therefore, the continuous circular motion of the wind (air mass) between the equatorial low pressure belt and the subtropical high pressure belts is known as Trade winds
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_______ used the extensive records of planetary positions measured by ______ to discover that the orbits of the planets are ________.
Kepler used the extensive records of planetary positions measured by Tycho to discover that the orbits of the planets are elliptical.
What are planets ?The planets would be listed from smallest to largest in order of size: Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, and Jupiter. The gas giants are Jupiter and Saturn, whereas the more distant Uranus and Neptune are known as the ice giants.
The International Astronomical Union (IAU) downgraded Pluto to a dwarf planet since it failed to satisfy all three criteria for a full-sized planet. Pluto essentially meets all the criteria, with the exception of the one that it "has not cleared its nearby vicinity of other objects."
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An electric car is being driven through a town at 22 m/s. The kinetic energy of the car is 222640 J. Calculate the mass of the car.
The mass of the electric car moving at the given speed and kinetic energy is determined as 920 kg.
What is kinetic energy?The kinetic energy of an object is the energy possessed by the object due to the motion of the object. The kinetic energy of an objects is determined from the product of object's mass and its velocity.
The mass of the electric car is calculate by applying kinetic energy formula as follows;
K.E = 0.5 mv²
where;
m is mass of the objectv is the velocity of the objectK.E is the kinetic energySubstitute the given parameters and solve for the mass of the electric car.
m = (K.E)/(0.5v²)
m = (222640) / (0.5 x 22²)
m = 920 kg
Thus, the mass of the electric car moving at the given speed and kinetic energy is determined as 920 kg.
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Soccer player 1 has a mass of 47 kg and moves to the right with a speed of 1.1 m/s. Soccer player 2 has a mass of 38 kg. If the total momentum of the two players is 2.2 kg m/s to the right, what are the speed and the direction of motion of player 2?
The speed and the direction of motion of player 2 is 2.2 = M1xV1 + M2xV2
2.2 = 47x1.1 + 38×V2
2.2 = 51.7 + 38xV2
-49.5 = 38×V2
V2 = -1.3 m/sec.
It means that the second object is moving opposite to first object.
What is momentum?Momentum is product of mass and velocity. It is a vector quantity and it's S.I unit kgxmeter/sec.
In above question
Player one has
M1 = 47 kg
V1 = 1.1 m/sec
Player two has
M2 = 38 kg
V2 = not given
Total momentum = 2.2 kgxm/sec
Total momentum = momentum of first body + momentum of second body
2.2 = M1xV1 + M2xV2
2.2 = 47x1.1 + 38×V2
2.2 = 51.7 + 38xV2
-49.5 = 38×V2
V2 = -1.3 m/sec.
It means that the second object is moving opposite to first object.
Therefore, The speed and the direction of motion of player 2 is 2.2 = M1xV1 + M2xV2
2.2 = 47x1.1 + 38×V2
2.2 = 51.7 + 38xV2
-49.5 = 38×V2
V2 = -1.3 m/sec.
It means that the second object is moving opposite to first object.
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An enemy ship appears on your radar screen! You send out a radar ping, which is a signal
that travels through space at a constant velocity, bounces off an object, and then returns to
your ship. The radar ping moves at 300,000,000 m/s. You send out the signal and it takes
0.00026667 seconds for the signal to return; how far away is the enemy ship?
Answer:d=80,001 m
Explanation:df = di + Vave(t)
d = 0 + 300,000,000(0.00026667)
d = 80,001 m
What is the
law of universal gravitation?
Answer:
Newton's Universal Law of Gravitation is a law created by Newton (obviously). It is the equation [tex]F=G\frac{m1m2}{r^{2} }[/tex] where F is the force of gravity, G is the gravitational constant (varies between places), m1 and m2 are the masses of the 2 objects and r is the distance between the centers of the 2 masses.
Newton's law of gravitation, states that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.
Hope that provides a basic overview
Hurry help me please!!!! question: because protons and electrons in an atom carry opposite charges, they are attracted to each other and thus maintain the boundaries of the atom as a ____ system.
1. double open
2. double closed
3. singular open
4. singular closed
Because protons and electrons in an atom carry opposite charges, they are attracted to each other and thus maintain the boundaries of the atom as a singular closed system.
An atom consist of equal number of electrons and protons, due to which the attractive force between them binds the atom together and hence no exchange of matter takes place, therefore an atom posses closed system.
If we consider that energy is emitted, when electrons emit energy, then this energy is absorbed in the atom, thus preventing the electrons from hitting the nucleus. More specifically, as the electron wave travels around the nucleus, it emits energy, but this energy is recaptured when the wave doubles back on itself in 1/2 or full wavelengths to form a standing wave.
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How much elastic potential energy does a spring store when it is compressed by 0.2 m if it has a spring constant of 5 N/m?
0.1 J of elastic potential energy will be stored by the spring when it gets compressed by 0.2 m if it has the spring constant of 5 N/m.
Elastic potential energy can be defined as the potential energy stored by the spring when it is stretched or compressed.
Amount of energy stored in the elastic material or spring is directly proportional to the amount of compression or elongation.It is represented by U.Mathematically, U = [tex]\frac{1}{2} k x^{2}[/tex] ; k is the spring constant and x is the compression or expansion suffered by the springAccording to the question.
Compression in the spring, x = 0.2 m
Spring constant, k = 5 n/m
Elastic potential Energy, U = [tex]\frac{1}{2} (0.2)^{2} (5)[/tex]
U = 0.1 J
0.1 J of elastic potential energy will be stored by the spring.
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An iron ring is magnetized by placing it near the north pole of a bar magnet. How would the magnetic field lines of the iron ring appear once it is magnetized?.
The magnetic field lines of the magnetized iron ring are concentrated near the north and south poles of the ring.
When an iron ring is put near the north pole of a bar magnet, the bar magnet's magnetic field lines are drawn to it. As a result, the iron ring gets magnetic, and its field lines become concentrated towards the ring's north and south poles.
By matching the north pole of the iron ring with the north pole of the bar magnet, the iron ring is magnetized. This produces a strong magnetic field between the two poles, magnetizing the iron ring. The iron ring's magnetic field lines will be visible as a series of concentric circles around the bar magnet's north pole.
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a uniform electric field of magnitude 4.6 ✕ 104 n/c passes through the plane of a square sheet with sides 3.0 m long. calculate the flux (in n · m2/c) through the sheet if the plane of the sheet is at an angle of 60° to the field. find the flux for both directions of the unit normal to the sheet. unit normal with component parallel to electric field n · m2/c unit normal with component antiparallel to electric field n · m2/c
41.4 x 104 Nm2/C is the electric flux through the sheet.
How to find the electric flux?The electric flux through a planar area A is calculated as the product of the electric field, the area of the plane, and the cosine of the angle between the electric field and a vector that is perpendicular to the area.
Φ = E A cos θ -----1
By the question;
E = 4.6 x 10⁴ N/C
A = Area of the square = l² [l = length of the square]
=> A = (3m)² = 9m²
θ = 0° [since the electric field is perpendicular to the square sheet, then the area vector is parallel to the field]
Substitute the values in equation 1
Φ = 4.6 x 10⁴ x 9 x cos 0°
Φ = 4.6 x 10⁴ x 9 x 1
Φ = 41.4 x 10⁴ Nm²/C
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An object attached to one end of a spring makes 20 vibrations in 10 seconds. its angular frequency is? 0.79 rad/s 1.57 rad/s 2.0 rad/s 6.3 rad/s 12.6 rad/s
An object attached to one end of a spring makes 20 vibrations in 10 seconds, its angular frequency is 12.6 rad/s.
The quantity of complete waveforms produced per second is a wave’s frequency (f). This is equivalent to the quantity of cycles per second or oscillations per second.
In this instance, a spring-attached object causes 20 vibrations in 10 seconds. 20 vibrations in 10 seconds, in other words. S creates two vibrations in a second.
As a result, the object’s frequency is 2 Hertz.
The anglular frequencyAngular frequency, abbreviated “[tex]\omega[/tex]” is a scalar measure of rotation rate in physics. It describes the rate of change of the argument of the sine function, the rate of change of the phase of a sinusoidal waveform, or the angular displacement per unit of time.
Calculationу = 20/10
= 2 vibrations in 1 second
Then w = 2[tex]\pi[/tex]v = 4 x 3.14
=12.56 rad /s
Thus, the angular frequency is 12.56 rad /s
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Suppose the magnitude of an electric field that exerts a 4. 80 x 10-17 n force on an electron is 300 n/c. What magnitude of the force does this field exert on a proton?.
The magnitude of the force exerted by the electric field on the proton will be 4.80 × 10—¹⁷ N.
The force exerted by the electric field on the electron =
4.80 × 10—¹⁷ N.
The direction of the electric field that is exerting force on the electron = West
The magnitude of the electric field is,
[tex] = \frac{4.80 \times 10 ^{ - 17} }{1.6 \times 10 - 19} [/tex]
= 300 N/C
The magnitude of the electric field is 300 N/C.
The magnitude of the force exerted by the electric field on the proton will be,
The magnitude of the force exerted by the electric field on the electron = The magnitude of the force exerted by the electric field on the electron.
[tex] = 4.80 \times 10 ^{ - 17} [/tex]
Therefore, the magnitude of the force exerted by the electric field on the proton will be 4.80 × 10—¹⁷ N.
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I already found Rx = -0.2 and Ry = -3. The magnitude is the square root of 0.2^2 + 3^2 = 3.01 I only need help understanding why when I plus in to solve for the direction why it won’t accept 86.2 when tan^-1(-3/0.2) doesn’t work. Please help explain to me the real answer or how I’m wrong. Thank you in advance
The values you found are incorrect.
The sum/resultant vector is
[tex]\hat R = \hat A + \hat B \\\\ \hat R = (5.00\,\mathrm m)\,\hat\imath + (6.00\,\mathrm m)\,(-\cos(30.0^\circ)\,\hat\imath - \sin(30.0^\circ)\,\hat\jmath) \\\\ \hat R = (2.00\,\mathrm m) \,\hat\imath - (3\sqrt3\,\mathrm m)\,\hat\jmath \\\\ \hat R \approx \boxed{(2.00\,\mathrm m)\,\hat\imath - (5.20\,\mathrm m)\,\hat\jmath}[/tex]
The magnitude of the resultant is
[tex]\|\hat R\| = \sqrt{(2.00\,\mathrm m)^2 + (-5.20\,\mathrm m)^2} \approx \boxed{5.57\,\mathrm m}[/tex]
The direction or angle the resultant makes with the positive horizontal axis is [tex]\theta[/tex] such that
[tex]\tan(\theta) \approx \dfrac{-5.20\,\mathrm m}{2.00\,\mathrm m} \approx -2.60[/tex]
Note the signs of the [tex]\hat\imath[/tex] and [tex]\hat\jmath[/tex] components of [tex]\hat R[/tex]. They tell us that [tex]\hat R[/tex] points into the fourth quadrant, and this means we can take the inverse tangent of both sides without any extra steps*. We then get
[tex]\theta \approx \tan^{-1}(-2.60) \approx \boxed{-67.0^\circ}[/tex]
* There would have been an extra step if [tex]\hat R[/tex] were pointing into either the second (negative [tex]\hat\imath[/tex], positive [tex]\hat\jmath[/tex]) or third quadrant (both negative [tex]\hat\imath[/tex] and [tex]\hat\jmath[/tex]). The inverse tangent function has a range of -90° to 90°, which means upon taking the inverse tangent of both sides of
[tex]\tan(\theta) = \dfrac{R_y}{R_x} \implies \theta = \tan^{-1}\left(\dfrac{R_y}{R_x}\right)[/tex]
we would only recover some angle [tex]\theta[/tex] between -90° and 90°. Yet our resultant must have some angle between -180° and -90°, or between +90° and +180° to belong to quadrant II or III. To get around this, we add an appropriately chosen multiple of 180° to the right side after taking the inverse tangent.
an ink-jet printer steers charged ink drops vertically. each drop of ink has a mass of 10-11 kg, and a charge due to 751896 extra electrons. it goes through two electrodes that gives a vertical acceleration of 104 m/s2. the deflecting electric field is mv/m.
The deflecting electric field is 0.83mv/m
Acc. to the newtons 2nd law - there is an acceleration when a force acts on an object.
F = ma (equation 1)
where
F is force
m is mass of object
a is acceleration
Electric field intensity- it is defined as force experienced by a unit positive charge placed at that point.
it is denoted by E = F/q
where
F is force
q is the charge
F = Eq (equation2)
from 1 and 2 equation we get
ma = Eq
E = ma /q
Charge on the drop of ink.is q.
(e is the charge on an electron.)
so,
q = 751896×e
q = 751896×1.6 ×⁻¹⁹
q = 12.03 ×10⁻¹⁴
m = 10⁻¹¹kg
a = 10⁴ m/s²
using above values
E = ma /q
E = 10⁻¹¹×10⁴/12.03 ×10⁻¹⁴
E = 0.83mv/m
The deflecting electric field is 0.83mv/m
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Suppose a 100-gram mass, when attached to a spring, causes the spring to stretch 8 cm.
What would you expect a 25-gram mass to do when attached to the same spring?
(1 point)
O Stretch the spring 4 cm.
O Stretch the spring 8 cm.
O Stretch the spring 32 cm.
O Stretch the spring 2 cm.
Answer:Apparently the further displacement should be of other 3 cm; but, let's consider the development of the spring on one vertical plain, and fixed on a wall by the upper end.
Now the spring doesn't look circular; but as a stick fixed on the wall. Before placing the first 100 grams weight, the stick is not horizontal; but its overhanging end is lower by the measured length of the spring at rest. The length line of the spring with its horizontal projection line forms an angle.
The first 100 grams load is decomposed in function of the new angle: one component in line with the stick, the other one perpendicularly respect to it. The same happens with 200 grams.
The flection momentum is given by the perpendicular component of the load with respect to the stick line in overload, and the measure of the stick itself. Such component is inversely proportional to the other component, and decreases in relation to higher load while the other component (that doesn't produce flexion) encreases.
I assume that I can't calculate the new displacement because is not given the height of the spring at rest, the length of the development of the spring. Accordingly, I cannot calculate all various angles of the stick in relation with gravity.
Explanation:
When a 25 g mass is attached to the same spring, the spring is stretched by 2 cm.
What is Hook's law?Hooke's law states that the applied force [F] equals a constant k times the displacement or change in length [x].
Mathematically - F = - Kx
Given is a situation in which a stretch of 8 cm is caused by a 100g mass.
From this, we can write -
Mass [m] = 100 g = 0.1 Kg
Displacement [x] = 8 cm = 0.08 m
According to the question -
The spring constant [K] can be calculated using Hook's law as -
F = -Kx
mg = -Kx
K = - mg/x
K = - (0.1 x 9.8) / 0.08
K = - 12.25 N/m
|K| = 12.25 N/m
Now, when mass [M] = 25g = 0.025 Kg, using Hook's law -
|F| = |- kx| = kx
Mg = 12.25x
x = Mg/12.25
x = (0.025 x 9.8)/12.25
x = 0.02
x = 2 cm
Therefore, when a 25 g mass is attached to the same spring, the spring is stretched by 2 cm.
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During a baseball game, a batter hits a high
pop-up.
If the ball remains in the air for 6.6 s, how
high above the point where it hits the bat
does it rise? Assume when it hits the ground
it hits at exactly the level of the bat. The
acceleration of gravity is 9.8 m/s².
Answer in units of m.
The ball rises 53.361 m above the point where the bat hit the ball.
When a batter hits a ball high in a baseball game, the ball remains in the air for 6.6 seconds.
The acceleration of gravity is 9.8 m/s².
The vertex value of time is half of 6.6 seconds or 3.3 seconds.
Therefore, the final velocity at the maximum height is v = 0 m/s
Now, using the equation of motion:
v - u = gt
v = u + gt
u × sin(θ) = - gt
u × sin(θ) = 9.8 × 3.3
u × sin(θ) = 32.34 m/s
Now, by using the equation of motion:
v² - u² = 2gh
h = ( v² - u²) / 2g
h = ( 0 - (32.34)² ) / 2(9.8)
h = (1045.8756) / 19.6
h = 53.361 m
The ball rises 53.361 meter high.
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