The reaction force is string pulling on the Nellie when a tether ball in a horizontal circular path over her head .
A reaction force is a force that acts in the opposite direction to an action force. i.e. Newton's third law of motion describes action and reaction forces and the law states that for every action force, there is an equal and opposite reaction force.
There are Newton's three law of motion which can be describe as ,
The first law is can be stated as, an object will not change its motion unless a external force acts on it.
The second law is describe as, the force on an object is equal to its mass times its acceleration. i.e.
F = ma
In above equation F is force , m is mass and a is acceleration on an object.
The third law can be explained as, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
Therefore , from the above discussion can be said as Nellie whirls a tether ball in a horizontal circulars path over her head. if the action force is nellie pulling on the string, the reaction force is string pulling on the Nellie.
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a solid, conducting sphere of radius r is positively charged. of the following distances from the center of the sphere, which location will have the greatest electric potential? (take v
The electric potential is highest where there is more potential energy present for the same charge.
(The + charge is relocating with nature; relocating with the E field does not require work.) (A + charge is traveling from a high PE to a low PE state when it moves naturally in the direction of the E field. The potential is constant at the value it reaches at the surface because there is no electric field inside a conducting sphere: additional charge geometries that might be possible. The potential energy from this work will be stored in the test charge. However, you won't have to do any effort because the electric field inside the sphere is zero.
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Mass X (2 kg) and mass Y (1 kg) are dropped from a tall building at the same time. After one second, X will be moving
Answer:
See below
Explanation:
Ignoring air friction...X will be moving the same speed as Y
vf = at
= 9.81 m/s^2 * 1 s = 9.81 m/s
PLEASE HELP!! WILL GIVE 20 BRAINY POINTS
Brian made this table to organize his notes on changes of state.
Which change of state has the wrong energy change listed?
A. condensation
B. deposition
C. melting
D. freezing
Answer: condensation
Explanation:
i hope it helped
___ is NOT a homogeneous mixture vinegar glue a salad gelatin
(A) Salad, is not a homogeneous mixture.
If the chemical makeup of a combination remains constant throughout, it is considered to be homogenous. Homogeneous mixtures and pure substances are sometimes confused with one another since they are both uniforms. The uniformity of the substance's makeup matters. The amount of salt in the water can vary from sample to sample.
All solutions would be regarded as homogenous since the dissolved ingredient is distributed uniformly across the entire solution. Since none of the components of the combination have interacted with one another, the identities of the individual materials have not changed.
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Please help question in the picture below.
Answer:
c. an electron is the particle of an atom that is negatively charged
Explanation:
the other statements are not the best at defining an electron
A plot of the maxwell distribution of speeds for the same sample of gas at different temperatures shows that.
At low temperatures, most molecules have speeds close to their average speed.
What is a molecule?A molecule is the smallest unit of a substance that keeps its content and properties. It is made up of two or more atoms that are joined together by chemical bonds. Chemistry is built on molecules. The element symbol and a subscript indicating the number of atoms are used to identify molecules.For instance, the symbols for the oxygen atom and molecule are O and O2, respectively.The smallest identifiable unit into which a pure substance may be divided while retaining its composition and chemical properties is a molecule, which is a collection of two or more atoms.A plot of the maxwell distribution of speeds for the same sample of gas at different temperatures shows that: At low temperatures, most molecules have speeds close to their average speed.
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Which statement belongs to Dalton’s atomic theory?
Atoms have a massive, positively charged center.
Atoms cannot be created or destroyed.
Atoms can be broken down into smaller pieces.
Electrons are located in energy levels outside of the nucleus.
The correct answer is Atoms cannot be created or destroyed.
Every element in space is made up of tiny, indivisible particles, which are invisible to the unaided eye, according to Dalton's atomic theory. These objects are referred to as atoms. Because "Atoms cannot be made nor destroyed by the human being," they are indestructible. The behaviour of an atom in one element differs from the behaviour of atoms in all other elements even though all the elements in an atom have the same mass.The leading philosophers of the day disagreed with Dalton's theory since it had some flaws. In that case, Aristotle fully disagreed, asserting that matter consisted of the four elements earth, wind, water, and fire. Scientists then adopted this view. The scientific community had now accepted atomic theory, but J. J. Thomson's finding in 1897 led to the next development. In his hypothesis, he described atoms as equally packed spheres of positively charged material that are filled with negatively charged electrons.
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Covert 87 centimeters into meters
Answer:
Explanation:
g
Answer: 0.87m
Explanation: 100 centimeters equal to 1 meter or one centimeter equal to one-hundredth
If the magnified cell had a diameter of 40mm on the computer screen using the 10x ocular lens with the 40x objective lens, what would be the actual diameter of the cell in millimeters?.
The actual diameter of the cell would be 0.1 mm.
How to find the actual diameter of the cell?The magnification caused by the ocular lens is 10x, while the magnification caused by the objective lens is 40x.
As a result, the entire setup will have a 400x overall magnification.
This signifies that a 400x magnification will be applied to an object with a diameter of x m.
The magnified cell in the aforementioned scenario has a diameter of 40 mm.
The amplified diameter is 400x when the true diameter is x.
Hence 400x = 40 mm x
= 40 mm/400x
= 0.1 mm
As a result, the cell's real diameter would be 0.1 mm.
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what is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight? use 1.67×10−27 kgkg for the mass of a proton, 1.60×10−19 cc for the magnitude of the charge on an electron, and 9.80 m/s2m/s2 for the magnitude of the free-fall acceleration.
The magnitude of the electric field is 1.023 * [tex]10^{-7}[/tex] N / C
We know that,
F = m g
F = q E
where,
F = Force
m =Mass
g = Acceleration due to gravity
q = Charge of an electron
Given that,
m = 1.67 * [tex]10^{-27}[/tex] kg
q = 1.6 * [tex]10^{-19}[/tex] C
g = 9.8 m / [tex]s^{2}[/tex]
F = m g = 1.67 * [tex]10^{-27}[/tex] * 9.8
F = 16.37 * [tex]10^{-27}[/tex] N
F = q E
E = 16.37 * [tex]10^{-27}[/tex] / 1.6 * [tex]10^{-19}[/tex]
E = 1.023 * [tex]10^{-7}[/tex] N / C
Electric field is the field surrounding an electrically charged particle. If any other charged particle enters the field, it exerts force on the particle.
Therefore, the magnitude of the electric field is 1.023 * [tex]10^{-7}[/tex] N / C
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A pony is released in its new pasture. Upon entering, the pony walks 40m North, then turns and walks 20m East, before turning again and walking another 40m South. What is the ponies total displacement?
The total displacement of the ponies in the new pasture is 20m in the East direction.
The change in position of an object is measured by two physical quantities namely Distance and Displacement.
Distance is the total path traveled by the object. It is a scaler quantity. It can never be zero for a moving object. Also, its value can never be negative.
Displacement is the length of the shortest path connecting the initial and final position of the object. It is a vector quantity. Its value can be negative or zero for a moving object.
Given in the question, the pony moves 40m in the North direction and 40m in the South direction. These Directions are opposite to each other and cancel out each other. So the net displacement is only due to the movement of 20m in the East direction.
So Total Displacement = (40m North) - (40m South) + (20m East)
Total Displacement = 20m East
Hence, the total displacement of the ponies in the new pasture is 20m in the East direction.
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6. A person walks 60.0 m and then he walks 130 m.
a) What is the person's distance?
A person walks 60 meters, and then he walks 130 meters. The total distance covered by man is 190 meters.
What is Distance?The distance of an object is its overall motion, regardless of direction. The amount of space that an object has traveled, regardless of where it started or ended, is referred to as distance.
Given that it only depends on the magnitude and not direction, distance is a scalar number. Only positive numbers are possible for distance.
According to the question,
The man walks 60 meters, then he walks again for 130 meters.
So, total distance covered by man :
Total distance= D1 + D2
=60+130
Total distance= 190 meters.
So the Distance covered by the man is 190 meters.
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. A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a
distance of 110 m. Determine the acceleration of the car.
The acceleration of the car is 4.05 m / s², if it accelerates uniformly over a period of 5.21 seconds for 110 meters.
We know that,
a = v / t
v = d / t
where,
a = Acceleration
v = Velocity
t = Time
d = Distance
Given that,
t = 5.21 s
d = 110 m
v = 110 / 5.21
v = 21.11 m / s
a = 21.11 / 5.21
a = 4.05 m / s²
Acceleration is the rate of change of velocity of an object over it period of movement. It is denoted as a.
Therefore, the acceleration of the car is 4.05 m / s².
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You have found that tides on earth are determined primarily by the position of the moon, with the sun playing only a secondary role. Why does the moon play a greater role in causing tides than the sun?.
You have found that tides on earth are determined primarily by the position of the moon, with the sun playing only a secondary role. The moon plays a greater role in causing tides than the sun because it is close to the earth than the sun.
Earth orbits around the sun due to its gravitational force, however, the formation of tides in the ocean takes place due to the force of gravity exerted by the moon.
Both the sun and the moon exert a gravitational pull on the earth.
Due to the difference in their distance, the moon plays a crucial role and has a dramatic effect on the earth which leads to tide generation as it has a greater force of gravity on earth as compared to the sun.
When the moon is closer to earth, a strong and large number of tides are formed.
In other words, no doubt the sun is much greater in size and has a large gravitational force but due to the large distance from earth, it does not play a greater role in the formation of tidal waves.
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what is the average velocity of an object which changes it's displacement by 3.50 meters in a time of 1.20 seconds?
The average velocity of an object which changes it's displacement by 3.50 meters in a time of 1.20 seconds is 2.92 m / s
v = Δx / t
v = Average velocity
Δx = Displacement
t = Time
Δx = 3.5 m
t = 1.2 s
v = 3.5 / 1.2
v = 2.92 m / s
Average velocity is the average value of velocity of an object in a given amount of time. It is denoted as v.
Therefore, the average velocity of an object which changes it's displacement by 3.50 meters in a time of 1.20 seconds is 2.92 m / s
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Who developed the equation that allowed the energy of the electron to be described quantum mechanically?.
Erwin Schrödinger developed the equation that allowed the energy of the electron to be described quantum mechanically.
Who is Erwin Schrödinger?Erwin Schrödinger, an Austrian physicist, proposed that the behavior of electrons within atoms might be explained by considering them mathematically as matter waves, which was based on de Broglie's hypothesis that particles could display wavelike behavior.
The wave equation developed by Nobel Prize-winning Austrian physicist Erwin Schrödinger fundamentally altered the way quantum theory was thought about.
Schrodinger's famous Erwin Schrodinger equation, one of the pillars of quantum physics, was uncovered in 1926. He explained how a physical system's quantum state changes over time using differential equations.
The Schrödinger equation, which defines how the wave function, a quantity that characterizes a particle's wave characteristics, evolves, is the work of Erwin Schrödinger and is its most famous application.
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how can you set up and solve 200x44?
Answer: 8800
Explanation:
There are two ways to solve this question.
1. Use the algorithm method which is:
First, multiply the 4 in the ones place to the zero in the one's place. Second, multiply the 4 in the ones place by the 0 in the tens place. Third, multiply the 4 in the ones place by the 2 in the hundreds place. you should get 800. next put a zero underneath the 800 in the ones place.
Next, multiply the 4 in the tens place to the 0 in the ones place of the 200. Then, multiply the same 4 to the zero in the tens place. After that, multiply the 4 of the tens place to the 2 in the hundreds place. You should write all these digits underneath your 800. Finally, add everything up and you should get your final answer of 8,800.
200
x44
-------------
800
8,000
------------
8,000
2. Another way to solve this problem is by breaking it up:
First, multiply 44 and 100 which is 4400. Then, multiply 44 and 100 again which is 4400. Add both numbers together which equals 8,800. We broke up 200 into 100's to make it easier to solve.
A 76 kg person is being pulled away from a burning building. If the tensions in the ropes when the person is momentarily motionless are equal. Calculate the tension in the ropes
According to tension force, the tension in the ropes is 760 N.
We need to know about tension force to solve this problem. According to second Newton's Law, the net force applied to an object will be proportional to mass and acceleration. Hence, it can be written as
∑F = m . a
where F is force, m is mass and a is acceleration
From the question above, we know that
m = 76 kg
g = 10 m/s²
a = 0m/s²
According to the question, the tension of the rope against the weight of the person. Hence, the tension in the ropes is
∑F = m . a
T - W = m . 0
T - m . g = 0
T = m . g
T = 76 . 10
T = 760 N
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a piano wire with mass 3.50 g and length 75.0 cm is stretched with a tension of 27.0 n . a wave with frequency 120 hz and amplitude 1.70 mm travels along the wire.
The average power is 0.1570 W.
Piano wire weighs 3.50 g.
Size: 83.0 cm
Tension = 35.0 N
120 Hz is the frequency.
Suppose we need to determine the average power carried by the wave with an amplitude of 1.20 mm.
We need to calculate the angular frequency
Using formula of frequency
ω = 2[tex]\pi[/tex]f
ω = 753.9 rad/sec
We need to calculate the linear density
Using formula of linear density
μ = M/l
μ = [tex]4.21[/tex] ×[tex]10^{-3}[/tex] kg/m
We need to calculate the average power
[tex]P_{avg}[/tex] = 0.1570 W
What is power ?Physics refers to power as the amount of energy that is transferred or transformed per unit of time. In the International System of Units, the unit of power is the watt, or one joule per second. In ancient literature, activity is another word for power.
Power is correlated with other factors; for instance, the power required to move a ground vehicle is a function of the vehicle's velocity and the traction force acting on its wheels. A motor's output power is calculated by multiplying its torque output by the angular velocity of its output shaft. The power lost by an electrical component in a circuit is also a function of the voltage across the component and the current that flows through it.
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An earthquake in California produces seismic waves that are detected in Phoenix
990 km from the epicenter. If the wave travels at 6.3 km/sec, how long
did it take for the wave to reach Phoenix?
approximately
In seconds? |
In minutes?
Answer:
t = 157.1428 s
t = 2.619 min
Explanation:
d = v/t
t = dv
t = (990km)(6.3km/s)
t = 157.1428 s
t = 2.619 min
Hope that helps
infrared radiation from young stars can pass through the heavy dust clouds surrounding them, allowing astronomers here on earth to study the earliest stages of star formation, before a star begins to emit visible light. suppose an infrared telescope is tuned to detect infrared radiation with a frequency of 9.45 thz. calculate the wavelength of the infrared radiation.
The wavelength of the infrared radiation is λ = [tex]3.174[/tex]×[tex]10^{-5}[/tex]m.
What is infrared radiation?
An infrared telescope is tuned to detect infrared radiation with a frequency of 9.45 THz.
We know that,
1 THz = 10¹² Hz
So,
f = 9.45 × 10¹² Hz
We need to find the wavelength of the infrared radiation.
λ=c/f
λ = 3×[tex]10^{8}[/tex]/9.45×[tex]10^{12}[/tex]
λ = 3.174 ×[tex]10^{-5}[/tex] m
The term "infrared radiation" (IR) refers to a part of the electromagnetic radiation spectrum with wavelengths between about 700 nanometers (nm) and one millimeter (mm). Longer than visible light waves but shorter than radio waves are infrared waves.
Electromagnetic radiation with wavelengths longer than those of visible light is known as infrared, also known as infrared light. Since it is undetectable to the human eye, The typical range of wavelengths considered to be infrared (IR) is from about 1 millimeter to the nominal red edge of the visible spectrum, or about 700 nanometers.
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A car moving with an initial speed of 16 meters per second is brought to rest uniformly in 4. 0 seconds. How far does the car travel during this 4. 0-second interval?.
The car in a time of 4 seconds will travel a distance of: 32 m
The formulas for uniformly varied rectilinear motion (UVRM) and procedures we will use to solve this exercise are:
a = (vf - vi) /tx = (vf²-vi²)/ (2a)Where:
x = distancevf = final velocityvi = initial velocitya = accelerationt= timeInformation about the problem:
vi = 16 m/svf= 0 m/st = 4 sa = ?x= ?Applying the acceleration formula we have:
a = (vf - vi) /t
a = (0 m/s - 16 m/s) /4 s
a = (-16 m/s) /4 s
a = -4 m/s²
Acceleration is negative because the car is decelerating
Applying the distance formula, we get:
x = (vf²-vi²)/ (2a)
x = [(0 m/s)²- (16 m/s)²]/ (2 * -4 m/s²)
x = (0 m²/s²- 256 m²/s²)/ -8 m/s²
x = -256 m²/s²/ -8 m/s²
x = 32 m
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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equ1.consider two springs a and b hanging from a pole. spring a extends 9.5 cm when 510 g is hung from it. spring b extends 0.95 mm when 5.1 kg is hung from it. a) determine the spring constant of each spring. b) explain which spring is stiffer.ation for kinetic energy
The value of spring constant for spring a and spring b is 531.70 and 52610.52 respectively. As the value of spring constant for Spring b is greater than a, So it is more stiffer.
What is spring constant?A spring's "spring constant" is a property that quantifies the relationship between the force acting on the spring and the displacement it produces. In other words, it characterizes a spring's stiffness and the extent of its range of motion.
a) For spring a,
Given, the extended length = 9.4cm = 0.094m
mass = 510 g = 0.51kg
For spring b,
The extended length = 0.95mm = 0.00095m
mass = 5.1 kg
The force acting on both springs will be -
For spring a,
F = mg (taking g = 9.8m/s²)
where m = mass and g = acceleration due to gravity
= 0.51 × 9.8
= 4.998N
Similarly, for spring b,
F = mg
= 5.1 × 9.8
= 49.98N
The Hooke's law gives us -
F = - Kx
We are to calculate K here,
k = F / x
k = 4.998 / 0.0094
k = 531.70
The value of spring constant for Spring a = 531.70
For spring b,
k = F/x
k = 49.98 / 0.00095
k = 52610.52
The value of spring constant for Spring b = 531.70
b) As the value of spring constant for Spring b is greater than a, So it is more stiffer.
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850 mg into kg
a, 0.85 kg
b, 0.085
c, 0.000 85 kg
d, 850, 000 kg
e, 850,000,000
help
9. Rank the four displacements for the time intervals CD, DE, EF, and FG in
decreasing order. Explain your answer.
In decreasing order, the ranking is as follows:
CD, DE, EF, and FGWhat is displacement?
Displacement can simply be defined as the difference in the position of the two objects and is independent of the path taken when traveling between the two objects.
Displacement is a vector quantity that has both a direction and magnitude.
The displacement of a hiker with a constant acceleration is equal to the average velocity during a time interval multiplied by the time interval.
The reason is because the time intervals are equal, the displacements are in the same order as decreasing average velocities. So therefore, the average velocity decreases in the order CD, DE, EF, and FG.
In conclusion, displacement depends on two positions which is the initial position and the final position.
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What is this scientific model illustrating?
Please help
Answer:
Water
Explanation:
There is one Oxygen Atom and two Hydrogen molecules. The molecule is Dihydrogen Monoxide, commonly known as water.
A motorcycle enters a freeway with a speed of 5.8 m/s and accelerates uniformly for 65 m in 7.2 s.
How fast is the car moving after this time?
The speed of the motorcycle is 9.02777m/s in 7.2 sec.
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 acting on an object determines the direction of its acceleration.
v(0) = 5.8
s(0)=0
s(7.2) = 65
s(t) =at^2/2 + v(0)t
s(7.2) = a(7.2)^2 + 5.8(7.2) = 65
a = (65-41.76)/51.84
a= 23.24/51.84 = about 0.4483 m/s²
v(t) = s'(t) = at +v(0) = at +5.8
v(7.2) = 0.4483(7.2) + 5.8
= 9.02777
velocity in 7.2 seconds is about 9.03 meters per second
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These steps are followed when using the half-life of carbon-14 to determine
the age of an object that contains carbon. What is the correct order of these
steps?
A. Measure the ratio of parent nuclei to daughter nuclei.
B. Use the half-life of carbon-14 to determine the number of half-lives
that have passed.
C. Use the number of half-lives that have passed to determine the age
of the object.
A. C, B, A
B. A, C, B
C. B, C, A
D. A, B, C
The half-life of carbon-14 to determine the age of an object that contains carbon B, C, A is the correct order of these steps.
What is carbon used for?Most industries in the world use carbon in some capacity. Coal, methane gas, and crude oil are all utilized as fuels (which is used to make gasoline). It is used to create a variety of products, including plastic and steel alloys (a combination of carbon and iron).
Where is carbon found?With the exception of a little amount that is present in the ocean, atmosphere, and living creatures, most of the carbon on Earth is trapped in rocks and sediments. These act as sinks or reservoirs for the carbon cycles.
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A star is moving directly towards earth at a large fraction of the speed of light. How does the light we observe from this star compare to the light received from the same star if it were at rest relative to earth?.
A star is moving directly toward earth at a large fraction of the speed of light. The light we observe from this star compared to the light received from the same star if it were at rest relative to earth will be blueshifted.
The elements of Earth are land, air, water, and life. Mountains, valleys, and flat places can all be found on the ground. Different gases, namely nitrogen and oxygen, make up the air. Rain, snow, ice, rivers, lakes, oceans, and streams are all examples of water. Doppler shift is the term used in physics to describe this phenomena, which is the alteration in wave frequency caused by an observer moving in respect to the source.
But much like the other planets, Earth is a planet that exists in space and is a part of the cosmos. It so happens that life exists here and that the conditions close to this planet's surface are favourable for life as we know it. The tiny, delicate planet Earth stands out in the universe.
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Write 1.47 X 10^3 m/s, the speed of sound in water, in standard notation
The speed of the sound in standard notation is 1,470 m/s.
What is standard notation?
A standard notation is a form of writing a given number, an equation, or an expression in a form that follows certain rules.
The speed of the sound in water can be written in standard notation as follows;
1.47 X 10^3 m/s = 1,470 m/s
Thus, the speed of the sound in standard notation is 1,470 m/s.
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