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3 years ago

A wave is incident on the surface of a mirror at an angle of 30° with the normal. At what angle will the outgoing wave reflect?

2 answers:

6 0

<span>One of the laws of reflection is that angles of incidence and of reflection are the same, there the reflected angle should be 30degrees.</span>

adelina 88 [10]3 years ago

4 0

The angle of reflection is equal to the angle of incidence there it will be reflected at an angle of 30 degrees from the normal

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A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the freque

boyakko [2]

Answer:

Explanation:

There is not enough information in the question. A beat is the observed differences between two frequencies.

Hence, 3 beat represents a difference of 3-hertz between the two frequencies. So the frequency of the piano string could be 1056+3 = 1059-hertz or 1056-3= 1053-hertz.

In order to ascertain the actual value i.e if it is an increase or a decrease in frequency observed, we need more information.

4 0

3 years ago

Determine la fuerza aplicada sobre un émbolo en una prensa hidráulica si se quiere cargar una lanza de 2970kg; toma en cuenta qu

Artist 52 [7]

I’m not sure sorry I really wish I could help

4 0

3 years ago

What is the primary cause of diffusion?

Lostsunrise [7]

<span><u>Answer</u>
c). random internal motion of atoms and molecules.

<u>Explanation </u>
Diffusion is the movement of particles from a region of high concentration to region of low concentration. The rate of diffusion can be increased by increasing amount of temperature but this is not its primary cause. Diffusion is primarily caused by movement of molecules or atoms in a substances. Form the choices given, the correct answer is c. random internal motion of atoms and molecules.
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3 0

3 years ago

Read 2 more answers

The man is walking with speed v1 = 1.35 m/s to the right when he trips over a small floor discontinuity. Estimate his angular ve

soldier1979 [14.2K]

Answer:

The angular velocity, $\omega = 1.05 rad/s$ clockwise

Explanation:

The mass of the man, m = 72 kg

The center of mass of the man will be at the middle of his body, particularly around his abdomen.

Height of the center of mass, h = 0.71 m

The speed of the man, v₁ = 1.35 m/s

Moment of inertia about the ankle joint, I = 66 kg/m²

Based on the principle of conservation of angular momentum (about the ankle joint):

Angular momentum before impact = Angular momentum after impact

Angular momentum before impact = -mv₁h

Angular momentum before impact = -(72 * 1.35 * 0.71)

Angular momentum before impact = -69.012 kg m²/s...............(1)

Angular momentum after impact = $I \omega$

Angular momentum after impact = $66 * \omega$ .................(2)

$66 \omega = -69.012\\\omega = -69.012/66\\\omega = -1.05 rad/s$

The angular velocity, $\omega = 1.05 rad/s$ clockwise

8 0

3 years ago

A car traveling at 7.3 m/s accelerates at the rate of 0.82 m/s2 for an interval of 7.4 s. Find vf.

MArishka [77]

<h2>Final velocity is 13.37 m/s</h2>

Explanation:

We have equation of motion v = u + at

Initial velocity, u = 7.3 m/s

Final velocity, v = ?

Time, t = 7.4 s

Acceleration,a = 0.82 m/s²

Substituting

v = u + at

v = 7.3 + 0.82 x 7.4

v = 13.368 m/s

Final velocity is 13.37 m/s

4 0

4 years ago