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3 years ago

What are two types of diffraction?

1 answer:

7 0

Fresnel and Fraunhofer diffraction. Fresnel diffraction is produced when light from a point source meets an obstacle, the waves are spherical and the pattern observed is a fringed image of the object. Fraunhofer diffraction occurs with plane wave-fronts with the object effectively at infinity. The pattern is in a particular direction and is a fringed image of the source.

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You are throwing a ball straight up in the air. At the highest point, the ball’s

Afina-wow [57]

The answer is C. Acceleration is nonzero, but it’s velocity is zero

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4 years ago

Nisha was making a list of things that are obtained from plants and Amol was making a list of things that can dissolve in water.

Allisa [31]

Answer:

Sugar

Explanation:

Nisha's list: Amol's list

Jute Vinegar

Wood Lemon juice

Rubber Cooking soda

Nisha's list is made up of things that can be derived from plants. From the list given, oil, sugar and cotton can also be obtained from plants.

Most plant materials are organic matter.

Amol's list is made up of things that can dissolve in water. Sugar and table salt can also be dissolved in water.

Water is able to dissolve these materials because they are polar compounds. One rule of solubility is that like dissolves like.

New list:

Nisha's list: Amol's list

Jute Vinegar

Wood Lemon juice

Rubber Cooking soda

Sugar Sugar

Only sugar from the list can be added to both lists. It can be obtained from plant and can also dissolve in water.

6 0

4 years ago

If you push a crate across a factory floor at constant speed in a constant direction, what is the magnitude of the force of fric

poizon [28]

Answer:

The magnitude of the force of friction equals the magnitude of my push

Explanation:

Since the crate moves at a constant speed, there is no net acceleration and thus, my push is balanced by the frictional force on the crate. So, the magnitude of the force of friction equals the magnitude of my push.

Let F = push and f = frictional force and f' = net force

F - f = f' since the crate moves at constant speed, acceleration is zero and thus f' = ma = m (0) = 0

So, F - f = 0

Thus, F = f

So, the magnitude of the force of friction equals the magnitude of my push.

3 0

3 years ago

Which of the following is an example of an electromagnetic wave?

PtichkaEL [24]

Answer:

red light light is an electromagnetic wave thats whyy

hope it helped

Explanation:

4 0

2 years ago

When a sound wave moves through a medium such as air, the motion of the molecules of the medium is in what direction (with respe

Alchen [17]

<span>A sound wave is a pressure wave that results from the vibration of the particles o the medium from the source. The motion of the particles in the medium is parallel to the direction of the energy transport. The type of wave formed by a sound wave is the longitudinal wave. </span>A longitudinal wave is characterized by rarefactions. A longitudinal wave is a wave motion wherein the particles in the wave medium are displaced parallel to transport. When motion is detected from the source, the particle next to it vibrates from its rest position and a progressive change in phase vibration is observed at each particle within that wave. The result is that the energy is transported from one region to the other. These combined motions result in the movement of alternating regions of rarefaction in the direction of propagation.

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3 years ago