Answer:
The net force acting on the mass is 16.523 N
Explanation:
The given mass of the object, m = 1.3 kg
The length of the inclined plane over which the mass slides = 8.7 × 10⁻¹ m
The time it takes the mass to slide = 0.37 s
Therefore, we apply the following kinematic equation of motion;
s = u·t + 1/2·a·t²
Where;
u = The initial velocity of the mass = 0 m/s
t = The time taken for the motion = 0.37 s
a = The acceleration
s = The distance moved in the motion = 8.7 × 10⁻¹ m = 0.87 m
Plugging in the values gives;
0.87 = 0 × t + 1/2 × a × 0.37²
∴ 0.87 = 1/2 × a × 0.37²
a = 0.87/(1/2 × 0.37²) ≈ 12.71 m/s²
The net force acting on the mass is F = Mass, m × Acceleration, a force = m × a
Therefore, the net force acting on the mass is F = 1.3 × 12.71 = 16.523
The net force acting on the mass, F = 16.523 N.
The net force acting on the mass along the incline is 16.523 N
From the information given:
the mass of the object = 1.3 kgthe length which corresponds to the distance (S) of the inclined plane = 8.7 × 10⁻¹ m the time taken = 0.37 sAccording to the second equation of motion;
[tex]\mathbf{S = ut + \dfrac{1}{2}at^2}[/tex]
the initial velocity u = 0 m/s since the mass starts from the rest
∴
[tex]\mathbf{S =0(t) + \dfrac{1}{2}at^2}[/tex]
[tex]\mathbf{S = \dfrac{1}{2}at^2}[/tex]
2S = at²
[tex]\mathbf{a = \dfrac{2S}{t^2}}[/tex]
[tex]\mathbf{a = \dfrac{2\times 0.87 \ m}{0.37^2}}[/tex]
acceleration (a) = 12.71 m/s²
The net force now acting on the mass along the incline can now be estimated as:
[tex]\mathbf{F_{net} = ma}[/tex]
[tex]\mathbf{F_{net} = 1.3 \ kg \times 12.71 \ m/s^2}[/tex]
[tex]\mathbf{F_{net} = 16.523 \ N}[/tex]
Therefore, we can conclude that the net force acting on the mass along the incline is 16.523 N
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two identical traveling waves, moving in the same direction, are out of phase by π/2 rad. what is the amplitude of the resultant wave in terms of the common amplitude ym of the two combining waves?
The amplitude of the resultant wave in terms of the common amplitude [tex]y_m[/tex] of the two combining waves which are out of phase by [tex]\frac{\pi}{2} \ \text{rad}[/tex] is [tex]\sqrt{2} y_m[/tex].
The amplitude of two waves interfering with each other depends on the principle of superposition.
Since, the waves are out of phase by [tex]\frac{\pi}{2} \ \text{rad}[/tex] so we can write the waves to be:
[tex]y_1=Asin(kx-\omega t)[/tex]
[tex]y_2=Asin(kx-\omega t+\frac{\pi}{2})\\ \therefore y_2=Acos(kx-\omega t)[/tex]
According to the principle of superposition, the resultant wave is written as:
[tex]y=y_1+y_2[/tex]
[tex]\Rightarrow y=A[sin(kx-\omega t)+cos(kx-\omega t)]\\\Rightarrow y=\sqrt{2}A[\frac{1}{\sqrt{2}}sin(kx-\omega t)+\frac{1}{\sqrt{2}}cos(kx-\omega t)]\\y=\sqrt{2}Asin(kx-\omega t+ \frac{\pi}{4})[/tex]
So from the above relation, we have the amplitude to be:
New Amplitude = [tex]\sqrt{2}A[/tex]
Hence, the amplitude of the combined waves is [tex]\sqrt{2}A[/tex].
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6. Different between
air Pressure and liquid pressure??
Answer:
The difference is that water is an incompressible fluid — its density is almost constant as the pressure changes — while air is a compressible fluid — its density changes with pressure. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a compressible fluid) above it.
Explanation:
Explain how energy from the sun is the primary source of energy on planet Earth, using the principles of the conservation of energy and examples to support your answer.
PLEASE HURRY
In an electrical circuit, the term current refers to:
a. resistance.
b. potential difference.
c. flowing charges.
d. energy loss.
Answer: c
Explanation:
Current is the flowing charges that goes around p.d increases it.
Please I need help ill give u 50 points
Answer:
trasvere wave
Explanation:
first one
write an essay for me pls about Proxima Centauri
this will help a lot
Answer:
Proxima Centauri is a small, low-mass star located 4.244 light-years (1.301 pc) away from the Sun in the southern constellation of Centaurus. Its Latin name means the "nearest [star] of Centaurus". This object was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun.
Star system: Alpha Centauri
Category: Star, Flare star
Constellation: Centaurus
Discoverer: Robert T. A. Innes
Explanation:
u should make it into an essay
a helicopter is ascending at a rate of 14m/s at a height of 20m above the ground it drops a package Calculate the time taken by the package to reach the ground
Adding the rise time and fall time then the package to reach the ground in 3.647 second.
Time can be defined in the sence as,that it is a continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.
We are given that ,
The packege 's trajectory into a rise to maximum height and fall from there to the ground .Rise to maximum height begins at vertical position is given as,
Vertical position of the helicopter = H₀ = 20 m,
Initial velocityof helicopter = u = 14 m/s upward
Covered time of the helicopter =t₁ = 0,
Acceleration under gravity of helicoper=(- a) = -9.81 m/s²
Rise ends when instantaneous velocity v = 0,
Therefore, from the equation of motion for velocity as a function of time is written as ,
v = a + at
0 = 14 m/s - (9.81 )m/s² t₁
t₁ = 1.427sec
Thus , the velocity changes linearly over time t₁ sec from u = 0 m/s then the averaging velocity can be given by w i.e.
w = u /2 = (14m/s)/2
w = 7 m/s
Therefore, maximum height of packege is given as,
H₁ = H₀ + w × t₁
H₁ =20m + 9.81m/s (1.427)s
H₁ = 33. 998 m
Therefore, when the packege fall from maximum height begins at ,
Time= t₁ = 0,
Position= h = H₁
Velocity= u = 0, and
Acceleration due to gravity downward=(-a) = -9.81 m/s²
Thus the equation of motion for position (s) as a function of initial position (h) is can be written as,
s = h + ut₁ + (1/2) at₂²
0 = H₁ + 0 + (1/2) (-9.81)t₂²
t₂² = 4. 890 s
t₂ = 2.21 s
Hence , on adding the rise time t₁ and fall time t₂
Total time T = t₁ + t₂
T = 1.427 s + 2.21s = 3.647 s
Thus, then the package to reach the ground in 3.647 second.
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Water can’t stick to itself. True or false?
Answer:ture
Explanation:
Review. For a certain type of steel, stress is always proportional to strain with Young's modulus 20 × 10¹⁰ N/m² . The steel has density 7.86× 10³kg / m³. It will fail by bending permanently if subjected to compressive stress greater than its yield strength бy = 400MPa. A .rod 80.0cm long, made
of this steel, is fired at 12.0 m/s straight at a very hard wall.(d) the strain
The strain in the rod is [tex]2.37\times 10^{-3}[/tex]
Given:
Young's modulus, Y = [tex]20 \times 10^{10}\;N/m^{2}[/tex]
Steel density, [tex]\rho = 7.86 \times 10^{3}\;kg/m^{3}[/tex]
Length of the rod, L = 80 cm = 0.800m
The speed of the wave in the rod is,
[tex]$v = \sqrt{\frac{Y}{\rho}} = \sqrt{\frac{20\times 10^{10}\ \mathrm{N/m^2}}{7.86\times 10^3\ \mathrm{kg/m^3}}} = 5044\ \mathrm{m/s}$[/tex]
Hence the time taken by the wave to travel the end of the rod is,
[tex]$t=\frac{L}{v} = \frac{0.800\ \mathrm{m}}{5044\ \mathrm{m/s}} = 1.58\times 10^{-4}\ \mathrm{s}$[/tex]
The velocity of the rod is, [tex]$v_r = 12.0\ \mathrm{m/s}$[/tex]
The other end will keep moving after the front end hits the wall until the wave reaches the other end, given the period determined by the above problem.
As a result, before the wave reaches the end of the rod, it has traveled a distance of
[tex]$\Delta L = v_r t = (12.0\ \mathrm{m/s}) (1.58\times\ \mathrm{s}) = 1.90\times 10^{-3}\ \mathrm{m} = 1.90\ \mathrm{mm}$[/tex]
The strain in the rod is given by,
[tex]$\frac{\Delta L}{L} = \frac{1.90\times 10^{-3}\ \mathrm{m}}{0.800\ \mathrm{m}} = 2.37\times 10^{-3}[/tex]
Hence, the strain in the rod is [tex]2.37\times 10^{-3}[/tex].
What is strain?In terms of physics, strain is defined as the fractional modification of configuration.
A system's reaction to an applied stress is called a strain, according to 2. A force that loads a material results in a stress that leads to deformation. Formula for a strain
Change in configuration equals strain first arrangement
It is a dimensionless quantity that lacks a unit.
Change in object size / original object size is known as strain.
It is a quantity without units or dimensions.
Strain kind.
Object length change divided by starting object length equals longitudinal strain.
L/L stands for longitudinal strain.
Change in object volume divided by starting object volume equals longitudinal strain
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A doctor is examining a child with a red, inflamed ear
canal. The child is suffering some hearing loss. The ear,
contains a small amount of soft earwax.
Which is most likely the cause of the child's hearing
loss?
O damage to the outer ear
O a disease or infection of the outer ear
O damage to the bones of the middle ear
O a disease or infection of the inner ear
Answer:
C
Explanation:
what's newtons second law
Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".
Suppose our Sun is about to explode. In an effort to escape, we depart in a spacecraft at v=0.800 c and head toward the star Tau Ceti, 12.0 ly away. When we reach the midpoint of our journey from the Earth, we see our Sun explode, and, unfortunately, at the same instant, we see Tau Ceti explode as well.(b) What If? In a frame of reference in which the Sun and Tau Ceti are at rest, did they explode simultaneously? If not, which exploded first?
Considering a scenario in which the Sun is going to explode.
In order to escape the explosion, we depart in a spacecraft with a speed of v = 0.8c.
The star Tau Ceti is 12 life years away.
At the midpoint of the journey, the Sun as well as Tau Cetik explode. at the same instant.
Imagine a hermit who is immobile with respect to both the Sun and Tau Ceti and resides on an asteroid that is midway between both. He observes the blast waves of both explosions as our spaceship passes him. This observer concludes that the two stars blew up simultaneously because he believes both stars to remain stationary.
In the frame of reference, the Sun and Tau Ceti explode at the same time and will remain stationary.
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6. A bored student throws a pebble straight up from a 5m cliff at 12 m/s. How much time
does it take to hit the ground below? Part 2: which letter (A, B or C) most accurately
portrays this scenario?
Answer:
It takes 0.416 seconds to hit the ground.
Explanation:
speed = distance/ time
12 = 5/ x (multiply both with x)
12x = 5 (÷ 12)
x = 0.416 s
Descibe the real-world examples of Newton's third lawthat were idenified in "Applications of Newton's Laws."
Answer:
A horse pulls a cart, a person walks on the ground
Explanation:
Answer:
Know it's late but I couldn't find a good answer when I looked for it so i did it myself.
My answer:
One of the real world examples mentioned in the article was that of a rocket blasting off into space. It was explained that it's an example of Newton's third law because the rocket’s engines push on those gases (action force), and the gases push back (reaction force). This reaction shows an excellent example of Newton's third law.
Sample Response:
When gases escape downward out the tail of a rocket, they push upward on the rocket. When layers of the Earth collide, they force the Earth upward, forming mountains.
Explanation:
hope this helps <3
what phenomenon is applied in the drawing of kerosene by the wicks of a kerosene stove.
Capillarity phenomenon is applied in the drawing of kerosene by the wicks of a kerosene stove.
A liquid's ability to flow through small openings without the aid of outside forces is known as capillarity. Cotton or cotton threads make up the majority of the wicks.
The process of a liquid flowing in a small space without the aid of, or even in opposition to, any outside forces like gravity is known as capillary action.
Surface tension causes a liquid in a capillary tube to have the inclination to rise or descend, which is known as capillarity. the uses of capillarity. 1. Even a tall tree uses the capillary rise to give water to the leaves at the top.
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NEED ANSWER ASAP
Study the circled features on the surface of the Sun.
The circled areas are called_____. They are_______ the surrounding area.
Answer:
the circles are called Sun spots. they are colder than the surrounding area.
Explanation:
Answer:
The circled areas are called__Sunspots___. They are___colder____ the surrounding area.
Explanation:
i just took the test it is correst plz give me a thanks or a brainiest and ill give 1 back :D
find the density, in g/cm3 , of a metal cube with a mass of 50.3 g and an edge length (l) of 2.65 cm . for a cube v
The density in g/cm³ of the cube is 2.70 g/cm³.
We need to know about density to solve this problem. Density is a unit that measures how dense the object is. It can be determined as mass divided by volume
ρ = m / V
where ρ is density, m is mass and V is volume.
From the question above, we know the cube have:
l = 2.65 cm
m = 50.3 gram
Find the volume of cube
V = l³
V = 2.65³
V = 18.61 cm³
Determine the density
ρ = m / V
ρ = 50.3 / 18.61
ρ = 2.70 g/cm³
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What is the acceleration of a 7 kg mass being pulled by a 56 N force?
Answer:
8 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
m is the mass
f is the force
From the question we have
[tex]a = \frac{56}{7} \\ [/tex]
We have the final answer as
8 m/s²Hope this helps you
what are the two components of any vector
Answer:
U^U
Explanation:
Two-dimensional vectors have two components: an x vector and a y vector. Each of these vector components is a vector in the direction of one axis. The sum of the components of vectors is the original vector. Three-dimensional vectors have a z component as well.
Which statement accurately describes nutritional dietary supplements?
A. Supplements labeled “natural” are safe for all people.
b. Supplements labeled “natural” may interact negatively with medications.
c.Over-the-counter supplements are safe at almost any dose.
d.Over-the-counter supplements are required to have proven health benefits.
Answer:
its b
Explanation:
Supplements labeled “natural” may interact negatively with medications. The correct option is B.
What is nutritional dietary supplement?Dietary supplements are substances that you may use to supplement your diet with nutrients or to reduce your risk of health problems such as osteoporosis or arthritis.
Dietary supplements are available in pill, capsule, powder, gel capsules and tablets, extracts, or liquid form.
Dietary supplements are available in a variety of forms, including tablets, capsules, gummies, powders, drinks, and energy bars.
Vitamins D and B12 are popular supplements, as are minerals like calcium and iron, herbs like echinacea and garlic, and products like glucosamine, probiotics, and fish oils.
Because many supplements contain active ingredients that have strong effects in the body, herbal products can pose unexpected risks. Natural supplements may have negative interactions with medications.
Thus, the correct option is B.
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A projectile has an initial horizontal velocity of 34.0 M/s at the edge of a roof top. Find the horizontal and vertical components of its velocity after 5.5s
I need shown work !
Answer:
[tex]v_x=34 m/s[/tex]
[tex]v_y=53.9\ m/s[/tex]
Explanation:
Horizontal Launch
When an object is thrown horizontally with a speed v from a height h, it describes a curved path ruled by gravity until it eventually hits the ground.
The horizontal component of the velocity is always constant because no acceleration acts in that direction, thus:
vx=v
The vertical component of the velocity changes in time because gravity makes the object fall at increasing speed given by:
[tex]v_y=g.t[/tex]
The horizontal component of the velocity is always the same:
[tex]v_x=34 m/s[/tex]
The vertical component at t=5.5 s is:
[tex]v_y=9.8*5.5=53.9[/tex]
[tex]v_y=53.9\ m/s[/tex]
Which is an example of kinetic energy?
a. an archer's bow with the string drawn back
b.river water at the top of a waterfall
c. a Ferris wheel before it starts turning
d.a crumb falling from a table.
Answer:
it's a
Explanation:
Answer:
I believe its D!
Explanation:
Kenetic energy is motion
What are some other examples of scientific knowledge that must have resulted from indirect evidence?
Answer:
The atomic model, the structure of the solar system, and the theory of black holes are examples of models created using indirect evidence.
Explanation:
I have no explanation sorry.
Indirect evidence is based on inference. The atomic structure, the structure of the solar system, and the theory of black holes are all based on indirect evidence.
In studying the structure of the atom, we do not directly observe the sub-atomic particles rather we draw inferences from several experiments and make conclusions. This is indirect evidence.
The solar system can be studied using several astronomical instruments that aid us in making useful inferences regarding the solar system.
The weight of evidence that substantiate the existence of black holes have also been amassed through indirect evidence.
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ANSWER THIS FOR BRAINLIEST CROWN ITS SO EASY!
Answer:
true
Explanation:
Inertia. Sometimes this first law of motion is referred to as the law of inertia. Inertia is the property of a body to remain at rest or to remain in motion with constant velocity.
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A 50.5 N object is in free fall.
What is the magnitude of the net force
which acts on the object?
Answer:
-49.49
Explanation:
If there’s no air resistance then the only thing acting on the object is the force of gravity which is mass times gravity. And to get mass all we have to do is divide 50.5/10 then times that by -9.8 since that’s the force of gravity.
Answer: The answer would be 50.5 N.
Explanation: It’s because there’s no air resistance.
A variable is defined as a___ that can have ____than one single value.
Answer:
item/object; more
Explanation:
A variable is defined as an object or item that can have more than one single value.
A variable is defined as a quantity that can have more than one single value.
In the context of mathematics and science, a variable is a symbol or quantity that can change or vary. It represents an unknown or changing value that can take on different values in different situations or scenarios. Variables are used to describe relationships, equations, and patterns in various fields such as mathematics, physics, economics, and more.
Variables are an essential concept in scientific research and experimentation. They allow scientists to investigate how changes in one factor can affect another factor. In an experiment, variables are typically categorized into two main types: independent variables and dependent variables. The independent variable is the one that the researcher manipulates or controls to observe its effect on the dependent variable, which is the outcome being measured.
For example, in a study investigating the effects of different amounts of fertilizer on plant growth, the amount of fertilizer would be the independent variable, as it is being controlled by the researcher. The plant growth would be the dependent variable, as it depends on the different amounts of fertilizer applied.
Overall, variables are fundamental components of scientific inquiry, data analysis, and problem-solving, enabling researchers and scientists to understand and describe the relationships and patterns within various phenomena.
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a student is measuring the effects of an electric circuit on a compass, and he is testing to see if increasing the current will cause the compass needle to change its direction faster. he does one trial using a 9-volt battery and another trial using a 1.5-volt battery. he takes accurate data. based on good experimental design, what would improve his experiment? he should add a non working compass to act as a control. he should add a non working compass to act as a control. he should use batteries of the same voltage but from different manufacturers to show he has used different variables. he should use batteries of the same voltage but from different manufacturers to show he has used different variables. he should repeat the test with three additional batteries of varying voltages to demonstrate the reproducibility of results. he should repeat the test with three additional batteries of varying voltages to demonstrate the reproducibility of results. he should use only one battery but do several trials, using different circuit designs to ensure he has appropriate test groups. he should use only one battery but do several trials, using different circuit designs to ensure he has appropriate test groups.
He should repeat the test with three additional batteries of varying voltages to demonstrate the reproducibility of results. he should use only one battery but do several trials, using different circuit designs to ensure he has appropriate test groups - this can improve the student's experiment.
What is reproducibility?Reproducibility, otherwise called replicability and repeatability, is a significant rule supporting the logical technique. For the discoveries of a review to be reproducible implies that results got by an examination or an observational review or in a factual investigation of an informational index. Albeit numerous organic researchers instinctively accept that the reproducibility of a trial implies that it tends to be repeated, Drummond makes a differentiation between these two terms. Informational indexes are huge and calculations are more refined. This requests reproducibility to decrease the mistake and predisposition when people are added to the course of information investigation.
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A solid sphere of radius 40.0cm has a total positive charge of 26.0μC uniformly distributed throughout its volume. Calculate the magnitude of the electric field(d) 60.0 cm from the center of the sphere.
The magnitude of the electric field for 60 cm is 6.49 × 10^5 N/C
R(radius of the solid sphere)=(60cm)( 1m /100cm)=0.6m
[tex]Q\;(\text{total charge of the solid sphere})=(26\;\mathrm{\mu C})\left(\dfrac{1\;\mathrm{C}}{10^6\;\mathrm{\mu C}} \right)={26\times 10^{-6}\;\mathrm{C}}[/tex]
Since the Gaussian sphere of radius r>R encloses all the charge of the sphere similar to the situation in part (c), we can use Equation (6) to find the magnitude of the electric field:
[tex]E=\dfrac{Q}{4\pi\epsilon_0 r^2}[/tex]
Substitute numerical values:
[tex]E&=\dfrac{24\times 10^{-6}}{4\pi (8.8542\times 10^{-12})(0.6)}\\ &={6.49\times 10^5\;\mathrm{N/C}\;\text{directed radially outward}}}[/tex]
The spherical Gaussian surface is chosen so that it is concentric with the charge distribution.
As an example, consider a charged spherical shell S of negligible thickness, with a uniformly distributed charge Q and radius R. We can use Gauss's law to find the magnitude of the resultant electric field E at a distance r from the center of the charged shell. It is immediately apparent that for a spherical Gaussian surface of radius r < R the enclosed charge is zero: hence the net flux is zero and the magnitude of the electric field on the Gaussian surface is also 0 (by letting QA = 0 in Gauss's law, where QA is the charge enclosed by the Gaussian surface).
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Please tell me why did she leave?
Answer:
aye man you alright? I’m here for you if u need anything. just keep ur head king and stay strong, I’m sorry for what happened. she probs left bc she wanted another guy, lost feelings, or family/personal issues etc.
how many years would it take to reach the star from earth, as measured by observers on the spacecraft
In other words, it would take Deep Space 1 more than 81,000 years to travel the 4.24 light-years between Earth and Proxima Centauri at its top speed of 56,000 km/h. In relation to human history, that would be more than 2,700 generations.
Nearly 40 trillion kilometers, or 4.4 light-years, separate us from Alpha Centauri. The NASA-Germany Helios probes, the fastest spacecraft to date to be launched into orbit, flew at a speed of 250,000 kilometers per hour. The probes would need 18,000 years to travel at such pace to arrive at the sun's nearest neighbor. The calculations reveal that it is almost impossible to reach the nearest star in a human lifetime, even with the most futuristic technologies.
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