How are waves that are created by a musical instrument and waves that
are produced by an earthquake alike?

- both types of electromagnetic waves

- both bend due to the force of gravity

- have the same frequency

- both caused by physical vibrations

Answer:3.5 seconds

Explanation:

Answer:

Force can make a body that is at rest to move. It can stop a moving body or slow it down. It can accelerate the speed of a moving body. It can also change the direction of a moving body along with its shape and size.

In Translational motion, the body moves in a straight line whereas in Rotational motion, the body moves in a circular path.

In Translational motion, the body moves in a straight line and the body same displacement in equal interval of time while on the other hand, in Rotational motion, the body moves in a circular path and the body travels same angular displacement in equal interval of time..

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The work needed to pump half of the water out of the aquarium is 39200 J.

We first need to calculate the volume of the aquarium. Using the formula for the volume of a rectangular prism (V = lwh), we get:

V = (8 m)(1 m)(1 m) = 8 m³

Since the aquarium is full of water, the mass of the water is equal to its density times its volume. Using the given density of water (1000 kg/m³), we get:

m = (1000 kg/m³)(8 m³) = 8000 kg

To pump half of the water out of the aquarium, we need to remove 4 m³ of water. The work needed to do this can be calculated using the formula for the work done against gravity (W = mgh), where h is the height through which the water is lifted. Since the water is being lifted out of the top of the aquarium, the height is equal to the depth of the aquarium (1 m). Therefore, we get:

W = (8000 kg)(9.8 m/s²)(1 m) = 78400 J

However, we only need to pump out half of the water, so we divide this answer by 2 to get:

W = 39200 J

Thus, the work needed to pump half of the water out of the aquarium is 39200 J, which was calculated by finding the mass of the water, determining the volume to be removed, and using the formula for work done against gravity.

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Answer:

I would say A, I hope this helped ; >

A ball when is projected horizontally from the top of a vertical cliff 40m high with a velocity of 20m/s, the vertical component of the velocity on getting to the ground​ is 28.3 m/s.

When any object moves, it can be said to be in motion under gravity because gravity has an impact on the object’s vertical motion. Gravity is also called as the force that pulls things downward. In actuality, gravity pulls objects toward the Earth’s center.

The particle’s initial velocity is 0 during free fall. Consequently, this v=gt is the equation of motion.

An object launched into the air may also experience a shift in upward velocity due to gravity, which causes it to slow down and return to Earth’s surface. The Moon is kept in orbit by the force of Earth’s gravity, which also causes the Moon to rotate constantly.

Initial horizontal velocity = 20\(ms^{-1}\)

Initial vertical velocity = 0

Vy= Uy + gt

Vy= gt {Uy= 0}

Vy= 10 × 2.83= 28.3m/s

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When it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction.

When it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

When a light ray passes from rarer to denser medium then light ray bends towards normal and whilst a light ray passes from denser medium to rarer medium then it bends away from everyday.

It surely slows down when it movements via some obvious materials, like glass or water. While light slows down, it adjustments course. This refraction of light is the cause a straw in water looks bent or damaged and why items viewed thru a tumbler bottle seem distorted.

When mild meets a water droplet, it's far refracted on the boundary of air and water, and enters the droplet, where the mild is dispersed into the seven colorings. The rainbow impact occurs due to the fact the light is then meditated within the droplet and in the end refracted out once more into the air.

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The first step is to find the frequency heard by each aircraft as they approach each other. Let's call the frequency heard by each aircraft.

According to the Doppler effect formula for sound, the frequency heard by an observer moving towards a stationary source is given by:

f' = (v + vs) / (v + vd) * f

where f is the emitted frequency, v is the speed of sound, vs is the speed of the source (aircraft in this case), and vd is the speed of the observer (also an aircraft in this case).

Since both aircraft are approaching each other at the same speed, we can assume that their speeds are equal and call it v_a. Therefore, we have:

f' = (v + v_a) / (v - v_a) * f

We are given that the frequency heard by each aircraft is 2 times the emitted frequency, so we can write:

2f = (v + v_a) / (v - v_a) * f

Simplifying this equation, we get:

2 = (v + v_a) / (v - v_a)

2(v - v_a) = v + v_a

v = 3v_a

Now we can substitute this value of v into the speed of sound formula to get the speed of each aircraft:

343 m/s = (3v_a + v_a)

v_a = 343 / 4 = 85.75 m/s

Finally, we can convert this speed to km/hr:

85.75 m/s * 60 s/min * 60 min/hr / 1000 m/km = 308.7 km/hr

Therefore, each aircraft must have a speed of approximately 308.7 km/hr in order for the pitch they both hear to be 2 times the emitted frequency.

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Answer:

The F = 0 and there is no force holding the balloon in place. This is consistent with the fact that the exit velocity is imaginary, to find the exit velocity v of the balloon rocket, we can use the Bernoulli's equation:
P1 + 1/2 * ρ * v1^2 = P2 + 1/2 * ρ * v2^2

In the above equation, P1 is the pressure inside the balloon (12 in-h2o), ρ is the air density (1.2 kg/m3), v1 is the velocity of air inside the nozzle (which we assume to be negligible), P2 is the atmospheric pressure outside the balloon (which we assume to be 1 atm), and v2 is the exit velocity of air from the nozzle (what we're trying to find).

First, let's convert the pressure inside the balloon from in-h2o to Pa:
12 in-h2o = 298.9 Pa

Now, we can rearrange the equation to solve for v2:
v2 = sqrt((P1 - P2) / (0.5 * ρ))
v2 = sqrt((298.9 - 101325) / (0.5 * 1.2))
v2 = sqrt(-83644.2)
v2 = imaginary number (not physically possible)

It appears that the exit velocity is imaginary, which means there is no solution. This could be due to the fact that the force holding the balloon in place is not strong enough to overcome the pressure inside the balloon.

To find the force F holding the balloon in place, we can use Newton's second law:
F = m * a

Where m is the mass of the balloon rocket and a is the acceleration of the rocket.
Assuming that the rocket is stationary (not moving), then a = 0.

Therefore, F = 0 and there is no force holding the balloon in place. This is consistent with the fact that the exit velocity is imaginary, as there would be no force holding the balloon in place if the pressure inside the balloon is greater than the force holding it in place.

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Answer:

19500kg

Explanation:

If you divide 195000N by 10

I would use this strategy in the following ways:

Strategy is  described as a general plan to achieve one or more long-term or overall goals under conditions of uncertainty.

We have three levels of strategy and they include:

By Observing my  environment or what is there around me  that can help me, it will help me overcome any obstacle that may come my way.

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No, since their gravity is powerful enough to keep them together even while the universe expands as a whole. Space is not expanding within clusters of galaxies.

A galaxy is a massive clump of gas, dust, and billions of stars and their solar systems bound together by gravity.

No, since their gravity is powerful enough to keep them together even while the universe expands as an entire.

Hence,space is not expanding within clusters of galaxies.

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Answer:

the second law of thermodynamics. that some energy is destroyed in every energy conversion.

Explanation:

According to the second law of thermodynamics, energy conversion is never 100% efficient. Some energy is always lost as it is being converted from one form to the other.

The fact that a steer must eat at least 100 pounds of grain to gain less than 10 pounds of muscle tissue shows that not all the energy taken up from the grain is channelled towards building the muscle tissue. Some energy from the grains are lost on the way according to the second law of thermodynamics.

Answer:

Explanation:

\(V^2=V^2_i+2a(x_f-x_i)\)

\(0.76^2=0^2+2a(15.2)\)

\(0.5776=30.4a\)

\(a=0.019m/s^2\)

When acceleration is constant and the initial velocity is zero, displacement varies with time as a parabolic function, increasing at an increasing rate.

When acceleration is constant and the initial velocity is zero, displacement (d) varies with time (t) according to the equation d = 1/2at^2, where a is the acceleration. This equation can be derived from the relationship between velocity, acceleration, and displacement, which is given by the equation v^2 = u^2 + 2as, where u is the initial velocity.

Since the initial velocity is zero, the equation can be simplified to v^2 = 2as, where s is the displacement. By integrating both sides of the equation with respect to time, we get v = at, and by integrating again with respect to time, we get s = 1/2at^2.

Therefore, when acceleration is constant and the initial velocity is zero, displacement varies with time as a parabolic function, increasing at an increasing rate. The rate of increase of displacement depends on the magnitude of the acceleration. The greater the acceleration, the greater the rate of increase of displacement. The displacement at any time can be calculated by substituting the time into the equation d = 1/2at^2.

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Answer:

that the acceleration is negative therefore it is directed to the left.

Explanation:

To find the acceleration of a system we must use Newton's second law

          ∑ F = m a

To apply this equation to our case we set a reference system where the direction to the right is positive.

We have 3 forces, a force F₁ = -20 N, a negative sign indicates that it is directed to the left, two forces F₂ and F₃ of magnitude 8N each directed to the right.

We substitute

            -F₁ + F₂ + F₃ = m a

           - 20 +8 + 8 = m a

             -4 = m a  

             a = -4 / m

Here we can see that the acceleration is negative therefore it is directed to the left.

The correct answer for the causes of the high intensity bands is the phenomenon of diffraction.

The high intensity bands observed when electrons pass through aluminium foil and hit a detector are caused by the phenomenon of diffraction . When the electrons pass through the aluminium foil, they encounter the atoms of the foil, causing them to diffract or scatter in different directions.

The diffraction of the electrons causes an alternating pattern of high and low intensity on the detector, with the high intensity bands resulting from the constructive interference of the diffracted electrons. In other words, the high intensity bands are caused by the overlapping of the diffracted electrons, resulting in an increase in intensity.

This phenomenon is similar to the diffraction of light waves, which also results in an alternating pattern of high and low intensity when they pass through a slit or obstacle.

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The expression for the object's speed at the bottom of the slope is:

v = sqrt(2gh - 2gLsinθ/mu_k)

To solve this problem, we can use the conservation of energy principle, which states that the total energy of a system remains constant as long as there are no external forces acting on it.

At the top of the slope, the object has only potential energy, given by:

Ep = mgh

where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the slope.

As the object slides down the slope, it loses potential energy and gains kinetic energy. The work done by the force of gravity is equal to the change in potential energy, so we have:

mgLsinθ = mgh - (1/2)mv^2

where θ is the angle of the slope, and v is the speed of the object at the bottom of the slope. The left-hand side of this equation represents the work done by the force of gravity as the object slides down the slope, while the right-hand side represents the loss of potential energy and the gain of kinetic energy.

Solving for v, we get:

v = sqrt(2gh - 2gLsinθ/mu_k)

where mu_k is the coefficient of kinetic friction between the object and the surface.

Therefore, the expression for the object's speed at the bottom of the slope is:

v = sqrt(2gh - 2gLsinθ/mu_k)

in terms of the variables m, mu_k, L, h, and appropriate constants.

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The given question is incomplete, the complete question is:

An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction between the object and the surface, mu k, is small enough that the object will slide down the slope if given a very small push to get it started. Part A Find an expression for the object's speed at the bottom of the slope. Express your answer in terms of the variables m, mu k, L, h, and appropriate constants.

Answer:

PE=mgh

 Where; m is the mass

              g is the gravitational force.

               h is the height.  

   the mass is 1kg, the acceleration due to gravity has a constant value of 10ms² . And the height is 3m.

mgh= 1 x 10 x 3 = 30Joules

Answer:

a = (V2 - V1) / t     for uniform acceleration

a = (15 - 5) / 2 = 5 m/s^2      (Number A)

Answer:

the halfway point

Explanation:

As an object falls under the influence of gravity, kinetic energy and potential energy are equal at the halfway point only.

Answer:

Protons are a type of subatomic particle with a positive charge. Protons are bound together in an atom's nucleus as a result of the strong nuclear force. Neutrons are a type of subatomic particle with no charge (they are neutral).

Answer:

the answer is kinetic energy

The statement that accurately describes work is: "force acts on an object and causes a displacement of that object."

Work is the amount of energy transferred by a force acting through a distance. In order for work to be done, there must be a force applied to an object and the object must move in the direction of the force. If there is no displacement of the object, then no work is done.

In the case of friction, it is a force that acts on an object, but it does not necessarily cause a displacement of that object. Friction can actually prevent an object from moving, which means that no work is done.

Therefore, the correct statement to describe work is: "force acts on an object and causes a displacement of that object."

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Starting from rest, a 2-kg body acquires a speed of 8 m/s in 2 seconds. the net force acting on the body is: 8 N

To solve this exercise the formula for net force and the formula for uniformly varied rectilinear motion (UVRM) to be applied are:

Where:

Information about the problem:

Applying the formula for UVRM we can calculate the acceleration of the runner:

a = (vf - vi) /t

a = (8 m/s - 0 m/s) / 2s

a = 8 m/s / 2s

a = 4 m/s²

With the acceleration we can apply the net force formula and get:

F = m * a

F = 2 kg * 4 m/s²

F = 8 N

It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.

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Understanding what a black hole is holds immense importance in unraveling the mysteries of the universe. A black hole can be defined as a region in space where gravity is so strong that nothing, not even light, can escape its gravitational pull.

Black hole is a region in space with a very strong gravitational field, which makes it difficult for anything, even light, to escape. It is essential for us to understand what a black hole is, as it is a fascinating concept that scientists have been researching for decades.

There are numerous reasons why it is important to understand black holes. Here are some of the reasons why:

1. It can assist us in comprehending the universe:Black holes can tell us a lot about the universe's origins, as well as how it functions. By studying black holes, we can learn more about how galaxies form and evolve, as well as the fundamental properties of the universe.

2. To learn more about physics:We can learn a lot about physics by examining black holes. For example, we can learn more about the properties of gravity and the behavior of matter under intense conditions by examining black holes.

3. To detect gravitational waves:The detection of gravitational waves is one of the most significant recent achievements in physics. By learning more about black holes, scientists can improve their ability to detect gravitational waves, which can provide important information about the universe.

4. For Space exploration:If humanity intends to travel beyond our solar system, we will need to learn how to navigate black holes. By studying black holes, we can learn more about the properties of space-time, which will be essential for future space exploration.

5. For developing new technologies:Scientific studies frequently lead to technological advancements. By studying black holes, scientists can learn about new technologies that may have a variety of applications, including space exploration and energy production.

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Answer:

C. A quantity with magnitude and a direction.

Explanation:

A vector can be defined as a quantity with magnitude and direction. Some examples of vector quantities are velocity, position, displacement, force, torque, acceleration.

For example, given the following data;

Time, t = 18.5secs

Final velocity = 78m/s

Initial velocity = 0

Substituting into the equation;

\(a = \frac{78 - 0}{18.5}\)

\(a = \frac{78}{18.5}\)

Acceleration, a = 4.22m/s²

Therefore, the acceleration of the object is 4.22m/s² due North.

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is final and initial velocity respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

Answer:

C. A quantity with magnitude and a direction.

Explanation:

A physical Quantity, which has magnitude, direction and units But must follow the traingle law of vector addition

To find the number of antinodes in the standing wave pattern, we need to find the wavelength of the fifth harmonic. The fifth harmonic has a frequency of 5 times the fundamental frequency, and the fundamental frequency is equal to the speed of sound divided by the length of the pipe. Thus, the wavelength of the fifth harmonic is the speed of sound divided by 5 times the fundamental frequency, which is equal to 340 m/s / (5 * (340 m/s / 1.5 m)) = 0.3 m.

Since the length of the pipe is 1.5 m, and the wavelength is 0.3 m, there will be 1.5 m / 0.3 m = 5 full wavelengths in the pipe. Since there is an antinode at both ends of the pipe, there will be a total of 5 + 2 = 7 antinodes in the standing wave pattern. Therefore, the correct answer is (C) 7.