Describe one piece of evidence to show light waves do not need a medium travel from one place to another

The period of revolution of the satellite in lunar months is:T_lunar = T/(2.36 × 10^6)

We can use Kepler's third law to relate the period of revolution of a satellite in circular orbit to its distance from the center of the body it orbits:

(T^2)/(R^3) = (4π^2)/(GM)

where T is the period of revolution, R is the radius of the orbit, G is the gravitational constant, and M is the mass of the body being orbited.

We can simplify this equation by expressing the radius of the orbit of the satellite in terms of the radius of the Moon's orbit. Let R_m be the radius of the Moon's orbit, then the radius of the satellite's orbit is:

R = 0.44R_m

Substituting this into Kepler's third law and solving for T:

(T^2)/[(0.44R_m)^3] = (4π^2)/(GM_e)

T^2 = [(0.44R_m)^3(4π^2)]/(GM_e)

T = √[(0.44R_m)^3(4π^2)/(GM_e)]

where M_e is the mass of the Earth.

To express the period in lunar months, we need to divide the period in seconds by the period of one lunar month. The period of one lunar month is approximately 27.3 days or 2.36 × 10^6 seconds.

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This means that the particles of the medium move up and down or side to side, while the wave itself moves .

In a transverse wave, the medium moves perpendicular to the direction that the wave travels

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In a transverse wave, the medium moves perpendicular to the direction that the wave travels.

A transverse wave is a type of wave in which the particles of the medium vibrate up and down or side to side, perpendicular to the direction in which the wave is moving. This means that the displacement of the particles is at right angles to the direction of wave propagation.

A common example of a transverse wave is a water wave. As a water wave travels across the surface of the water, the water molecules move up and down in a perpendicular motion. Another example is a light wave, where the electric and magnetic fields oscillate perpendicular to the direction of wave propagation.

It's important to note that in a transverse wave, the particles of the medium do not actually travel with the wave. Instead, they vibrate in place as the wave passes through them.

In summary, a transverse wave is characterized by the medium moving perpendicular to the direction of wave propagation. This type of wave can be observed in various phenomena, such as water waves and light waves.

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1.) The AMA is 2.5

2.) The VR is 5.

3.) The efficiency is 50%.

Given that the object has a weight of 250 N and the effort needed to push it up the ramp is 100 N, we can calculate the AMA as follows:

AMA = Load / Effort

AMA = 250 N / 100 N

AMA = 2.5

Therefore, the AMA is 2.5.

To calculate the VR, we need to find the distance moved by the effort and the distance moved by the load. The distance moved by the effort is the length of the ramp, which is 50 m. The distance moved by the load is the height it is raised, which is 10 m. Therefore, we have:

VR = Distance moved by effort / Distance moved by load

VR = 50 m / 10 m

VR = 5

Therefore, the VR is 5.

To calculate the efficiency, we need to find the work done by the load and the work done by the effort. The work done by the load is:

Work done by load = Load x Distance moved by load

Work done by load = 250 N x 10 m

Work done by load = 2,500 J

The work done by the effort is:

Work done by effort = Effort x Distance moved by effort

Work done by effort = 100 N x 50 m

Work done by effort = 5,000 J

Therefore, the efficiency is:

Efficiency = (Load x Distance moved by load) / (Effort x Distance moved by effort)

Efficiency = (2,500 J) / (5,000 J)

Efficiency = 0.5 or 50%

Therefore, the efficiency is 50%.

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The question involves determining the force exerted by the elevator floor on a person's feet and the lifting force exerted by the person on a package during an acceleration.

In this scenario, the elevator is undergoing acceleration, which affects the forces acting on the person and the package. To determine the force exerted by the elevator floor on the person's feet, we need to consider the person's weight and the acceleration of the elevator. The force exerted by the elevator floor on the person's feet is equal to the person's weight plus the force required to provide the upward acceleration.

The lifting force exerted by the person on the package can be calculated using Newton's second law (F = ma). Since the package is being lifted, there is an upward force exerted by the person on the package. This force is equal to the mass of the package multiplied by the acceleration. The acceleration in this case is the same as the elevator's acceleration, as they are both experiencing the same upward force.

In summary, to find the force exerted by the elevator floor on the person's feet, we need to consider the person's weight and the elevator's acceleration. For the lifting force exerted by the person on the package, we use Newton's second law and consider the mass of the package and the elevator's acceleration.

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Answer: v= 80 m/s

Explanation: speed = wavelength×Frequency

Answer:

it's true...........

Answer:

The magnitude of the electrostatic force between the spheres is 2.25 x 10^-5 N, and its direction is towards the center of the two spheres (i.e., it is attractive).

Explanation:

To calculate the electrostatic force between two charged spheres, we need to use Coulomb's law:

F = k * (q1 * q2) / r^2

where F is the electrostatic force, k is Coulomb's constant (9 x 10^9 N m^2/C^2), q1 and q2 are the charges of the spheres, and r is the distance between their centers.

We don't have the charges of the spheres, so let's assume they have charges of q1 = 1 C and q2 = -1 C (positive and negative charges, respectively). The distance between their centers is r = 4 x 10^-1 m.

Plugging these values into Coulomb's law, we get:

F = (9 x 10^9 N m^2/C^2) * (1 C * -1 C) / (4 x 10^-1 m)^2

F = -2.25 x 10^-5 N

The negative sign indicates that the force is attractive, since the charges are of opposite signs.

Therefore, the magnitude of the electrostatic force between the spheres is 2.25 x 10^-5 N, and its direction is towards the center of the two spheres (i.e., it is attractive).

Answer:

F = 8.23 × 10⁻⁸N

Explanation:

F= kq²/r²

k= 9×10⁹Nm²/C²

q= 1.6×10⁻¹⁹C

r= 5.29×10⁻¹¹m

F= 9×10⁹× (1.6×10⁻¹⁹)²/  (5.29×10⁻¹¹)²

F = 8.23 × 10⁻⁸N

Answer:

C. A Covalent Bond

Explanation:

two covalent bond form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell

ANSWER

EXPLANATION

If force F keeps the object in equilibrium

Answer:

See below

Explanation:

Find the x components of all of the forces shown, add them together, the x-component of the force F will be exactly opposite ( same magnitude but 180 degrees different)

30 cos 55  +     40 cos 205   +   50 cos 320  =  19.26    <====x component sum of all of the forces shown

F  (the x component of ) will be   Either    - 19.26   At zero degrees

                                                                 Or 19.26 at 180 degrees

The minimum radius of the circle can be 230.2 meters.

Here, we have an example of centripetal acceleration. So there's an airplane moving in a vertical motion and we want the pilot to experience no more Than 4g of acceleration.

So the centripetal acceleration is at most 4g.

We have

Velocity at lowest point = 95m/s

And let us consider the mass of the plane be ‘m’

Then by using the equation on force in the circular motion we have

F = mv²/r

Or

ma = mv²/r

Mass cancels out from both sides and we are left with

a = v²/r

Therefore, r = v²/a

r = 9025/4g

r 9025/39.2

r = 230.2 m

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Answer:

16N

Explanation:

ΣF = ma

Fapplied = (8kg)(2m/s^2)

Fapp = 16N

There are a lot of reasons why the temperature of the water might stay constant even though the fire continues to burn.

Another given  reason could be that the water is being cooled by other factors, such as the air or the container in which it is placed. If the water is losing heat faster than it is being added by the fire, then its temperature will remain constant or even decrease.

Therefore, It is also possible that the water is being heated by the fire at a constant rate, so that the heat being added to the water is balanced by the heat being lost to the environment. In this case, the temperature of the water would remain constant.

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The frequency heard by a passenger on the train is lower than the original frequency, given that the train is moving away from the source of the sound.

When a source of sound is moving relative to an observer, the perceived frequency of the sound can be affected by the Doppler effect. The Doppler effect causes a shift in frequency when there is relative motion between the source and the observer.

In this case, the train is moving at a speed of 18.0 m/s relative to the ground, in a direction opposite to the first train and receding from it. As the train moves away from the source of the sound, the perceived frequency of the sound decreases.

The exact change in frequency can be calculated using the Doppler effect equation, which takes into account the relative velocity of the source and observer.

However, since the specific frequency of the sound source is not provided in the question, it is not possible to calculate the exact frequency heard by the passenger on the train

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Answer:

v = 1.63 m/s

Explanation:

Given that,

The mass of a car, m = 1500 kg

The kinetic energy of a car, K = 2004 m/s

We need to find the speed of a car. The formula for the speed of a car is given by :

\(K=\dfrac{1}{2}mv^2\\\\v=\sqrt{\dfrac{2K}{m}} \\\\v=\sqrt{\dfrac{2\times 2004}{1500}} \\\\v=1.63\ m/s\)

So, the speed of the car is equal to 1.63 m/s.

Answer:taking my points !

Explanation:

Answer:

The right answer is c because when we heat solid object the molecule will start lose attraction on object

Explanation:

brain list

Answer:

may be upside down alphabet :"T"

Explanation:

Throughout the reflection, make sure you have a copy of the student guide, pdf or word and your data tables. Use the drop-down menus to complete the statements. In this experiment, the type of cream (medicated or placebo) was intentionally manipulated. This was the independent variable. The dependent variable measured was the number of pimples on each participant's face.

Reflection or reflection is a change in the direction of propagation of light toward the side of origin, after hitting the interface of two media. Reflection in the era of geometric optics is described by the law of reflection, namely: The incident ray, the reflected ray, and the interface normal axis are in the same plane.

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Answer:

Step-by-step explanation to arrange a magnet so that the hoop does the opposite of what it did previously:

1. Place the magnet on a flat surface.

2. Identify the direction that the hoop moved previously (i.e., whether it continued or stopped).

3. Turn the magnet so that the poles are facing in the opposite direction of the previous movement of the hoop.

4. Observe the new movement of the hoop and check if it is doing the opposite of the previous movement.

How did the arrangement of the magnet differ in this case? In this case, the arrangement of the magnet was different because the poles were faced in the opposite direction of the previous movement of the hoop. This change in the direction of the magnet's poles caused the hoop to move in the opposite direction.

Answer:

B: transmission

Explanation: Transmission of waves occurs when waves pass through a given point or medium. Sound waves are transmitted through solids, liquids, and gases therefore the answer is the transmission

Galileo classifies qualities into primary and secondary qualities. Primary qualities are those that are inherent in an object and cannot be changed.

key characteristics include, An object's mass, which defines its weight and measures its resistance to acceleration, is the total amount of matter in the object.

The length, width, and height of an object establish its size or dimensions, which in turn determine its volume.

Shape: An object's form or configuration, which influences how it looks and how it is outlined.

Motion is the act of an item moving, including its speed, acceleration, and direction.

Location: An object's coordinates can be used to define its position in space.

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Answer:

the scientific concept being illustrated in this model is dispersion

International space station is the mission of NASA. It has launched 134 successful space missions.

International space station is a huge place in the space but in the close orbit with all possible facilities for astronauts , scientists and others

The National Aeronautics and Space Administration (NASA) is an acronym for the National Aeronautics as well as Space Administration. NASA was established as a division of the United States government on October 1, 1958. NASA is just in charge of all research and technology related to aviation and space in the United States.

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To present an equally small bull's eye as throwing a dart at a dime, the dime would need to be approximately 22.5 billion kilometers away.

Creating an analogy to understand the difficulty of the Mars mission in terms of throwing a dart at a dime can help provide a perspective. Let's assume the size of the bull's eye on the dime represents the accuracy required for the mission.

To create an equally small bull's eye on a larger scale, we can consider the ratio of the distances between Earth and Mars and the dime in our analogy.

The average distance between Earth and Mars is approximately 225 million km. Let's assume the dime is 1 cm in diameter.

If we scale up the distance by the same ratio as the size of the dime, we get:

(225 million km) / (0.01 cm) ≈ 22.5 billion km

Therefore, to present an equally small bull's eye as throwing a dart at a dime, the dime would need to be approximately 22.5 billion kilometers away.

This analogy demonstrates the immense challenge and precision required for a mission to Mars. Achieving the necessary orbital alignment, timing, and accuracy is a complex task that requires careful planning and advanced technology.

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Using Stokes' Theorem, the work done by the force field F along the given closed path is found to be zero.

Stokes' Theorem relates the surface integral of a vector field over a closed surface to the line integral of the same vector field along the boundary of the surface. In this problem, the force field F(x, y, z) is given as

\(F(x, y, z) = z^2i + 3xyj + 5y^2k\)

The path of the particle is a closed path that starts and ends at the origin (0, 0, 0) and passes through the points (2, 0, 0), (2, 3, 1), and (0, 3, 1).

To find the work done by the force field F along this closed path, we first need to find the curl of F. The curl of F is given by the vector differential operator ∇ x F. After computing the curl, we can find the surface integral of the curl over the surface enclosed by the path using the given points. However, since the curl of F is zero (as verified by calculating the curl), the surface integral over the enclosed surface is zero.

According to Green's theorem, the work done by the force field along the closed path is equal to the surface integral of the curl over the surface, which is zero. Therefore, the work done by the force field F along the given closed path is zero.

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The Complete question is

A particle moves along line segments from the origin to the points (2, 0, 0), (2, 3, 1), (0, 3, 1), and back to the origin under the influence of the force field

F(x, y, z) = z2i + 3xyj + 5y2k.

Use Stokes' Theorem to find the work done.

Answer:

A

Explanation:

The wavelength is the spatial time of an occasional wave, the distance over which the wave's shape rehashes.

Hope this helped!!

Answer:

wavelength

Explanation:

Answer:There are total four forces acting on the bicyclist namely, gravitational force, normal force, pushing force and air drag.

The magnitude of net force acting on the bicyclist is 165 N.

The required magnitude of force generated for the pedaling is of 225 N.

Given data:

The mass of bicyclist is, m = 75.0 kg.

The magnitude of acceleration is, .

The magnitude of drag force is, F = 60.0 N.

(1)

There are in total 4 forces acting on the bicyclist:

The gravitational force on the bicyclist, acting vertically downward, of magnitude , where m is the mass of the bicyclist and g is the acceleration due to gravityThe normal force exerted by the floor on the bicyclist and the bike, N, vertically upward, and of same magnitude as the gravitational forceThe force of push F", acting horizontally forward, given by the push exerted by the bicyclist on the pedalsThe air drag, F, of magnitude F = 60.0 N, acting horizontally backward, in the direction opposite to the motion of the bicyclist

(2)

The magnitude of net force acting on the bicyclist is given as,

Thus, the magnitude of net force acting on the bicyclist is 165 N.

(3)

We need to find the forward force of push, F'', which is actually the force generated during pedaling.

Then the expression for the forward pushing force F" is given as,

Thus, we can conclude that the force  generated for the pedaling is of 225 N.

Explanation:

The magnitude of the net force on the bicyclist was 0 N.

Her pedaling is generating  a force of  50 N in opposite of the drag force .

Force is defined in physics as: the push or pull on an object with mass that causes it to change velocity. Force is an external agent that can change the state of rest or motion of a body. It has a magnitude as well as a direction.

A spring balance can be used to calculate force.

As the bicyclist (including the bicycle) is pedaling right with a constant speed, the magnitude of the net force on the bicyclist was = mass × acceleration

= 70 kg × 0 m/s²

= 0 N.

Again her pedaling is generating  a force = drag force = 50 N in opposite of the  drag force . So that, net force on it becomes zero.

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Assuming that air resistance is neglected, both the ping pong ball and the bowling ball will hit the ground at the same time.

This is because, according to the laws of physics, the acceleration of an object due to gravity is independent of its mass. Both the ping pong ball and the bowling ball will experience the same acceleration due to gravity as they fall, which is approximately 9.8 meters per second squared (9.8 m/s^2) near the surface of the Earth.

Since the acceleration due to gravity is the same for both balls, they will both accelerate at the same rate and therefore reach the ground at the same time, neglecting air resistance.

It's worth noting that in the presence of air resistance, the balls would experience a drag force that would slow them down and cause them to fall at different rates. However, if air resistance is neglected as stated in the question, then both balls will hit the ground at the same time.

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