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3 years ago

Which of the following statements is true about the nature of light?

Physics

1 answer:

lukranit [14]3 years ago

4 0

Light shows duality i.e it shows properties of both particle as well as wave.

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Simple pendulum, is show in several states In case A the mass is travelling back down to the bottom and is in between the bottom

uysha [10]

The angular acceleration is maximum in case C

Explanation:

The motion of the bob in the simple pendulum is a portion of a circular motion. In a circular motion, the angular acceleration is related to the tangential acceleration by

$a=\alpha r$

where

a is the tangential acceleration

$\alpha$ is the angular acceleration

r is the radius (the length of the pendulum)

Moreover for a pendulum, the tangential acceleration is given by the component of the acceleration of gravity in the tangential direction, so

$a=g sin \theta$

where

g is the acceleration of gravity

$\theta$ is the angle of the pendulum with the vertical

So we have

$\alpha = \frac{g sin \theta}{r}$

Since g and r are constant, we see that the angular acceleration is proportional to the angle: the larger the angle, the larger the angular acceleration, and the smaller the angle, the smaller the angular acceleration.

Therefore, the angular acceleration is maximum when the pendulum is at its maximum height, and zero when it is at the lowest position. So, the correct statements are

It is maximum in case C

Learn more about periodic motion:

brainly.com/question/5438962

#LearnwithBrainly

3 0

3 years ago

Two people are standing on a 2.50-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of a

trasher [3.6K]

Answer:

The platform move before coming to rest again 0.045 m far

Explanation:

Given

Ball is in motion

M (Platform mass + 2 people mass)

V (recoil velocity of the platform)

m (ball mass)

v (velocity ball)

MV + mv = 0

Distance of the platform movement is

t (time that the ball is in the air)

x = Vt

t = $\frac{L}{v - V}$

Knowing the platform and the ball are moving while the ball is in the air

x = $\frac{V}{v - V} * L$

Also knowing that

$\frac{V}{v} = \frac{-m}{M}$

This way,

x = $((\frac{V}{v}) * L) / (1 - \frac{V}{v})$ = $-\frac{m*L}{M + m} = -\frac{3.63 kg * 2.50 m}{198 kg + 3.63 kg} = -0.045 m$

The minus sign means the displacement of the platform is in opposite direction to the displacement of the ball.

6 0

3 years ago

A wave with low frequency would have relatively ________.

N76 [4]

Answer A, low energy and long wavelength.

3 0

3 years ago

Read 2 more answers

Work and power!

Tema [17]

Answer:

The work done in a unit of time is C. Power.

Explanation:

Hope this helps

5 0

3 years ago

A friend asks you how much pressure is in your car tires. You know that the tire manufacturer recommends 30 psi, but it's been a

Rama09 [41]

Answer:

21 psi

Explanation:

The weight of the car is:

W = mg

W = 1000 kg * 9.8 m/s²

W = 9800 N

Divided by 4 tires, each tire supports:

F = W/4

F = 9800 N / 4

F = 2450 N

Pressure is force divided by area, so:

P = F / A

P = (2450 N) / (0.13 m × 0.13 m)

P ≈ 145,000 Pa

101,325 Pa is the same as 14.7 psi, so:

P ≈ 145,000 Pa × (14.7 psi / 101,325 Pa)

P ≈ 21 psi

3 0

3 years ago