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3 years ago

Describing motion with velocity-time graphs.

Physics

1 answer:

irina1246 [14]3 years ago

5 0

This link should help you out!!

http://mszopiak.weebly.com/uploads/5/5/8/1/55815541/p_vtgraphskey_mszopiak.pdf

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As steam is slowly injected into a turbine, the angular acceleration of the rotor is observed to increase linearly with the time

gavmur [86]

Answer:

217.04 rad/s

Explanation:

We are given that

Initial velocity, $\omega_0=0$

t=10 s

Number of rev=20

We have to find the angular velocity at t=24 s

$\theta_1=2\pi\times 20=40\pi rad$

$\alpha=kt$

$\frac{d\omega}{dt}=kt$

$\int d\omega=\int_{0}^{t} ktdt$

$\omega=\frac{kt^2}{2}$

$\frac{d\theta}{dt}=\frac{kt^2}{2}$

$\int d\theta=\int_{0}^{t}\frac{kt^2}{2} dt$

$\theta=\frac{kt^3}{6}$

Substitute the values

$40\pi=\frac{k(10)^3}{6}$

$k=\frac{40\pi\times 6}{(10)^3}=\frac{24\pi}{100}$

Substitute the value of k and t=24

$\omega=\frac{24\pi\times (24)^2}{2\times 100}=217.04 rad/s$

8 0

4 years ago

What do you think is causing the moon to appear to get bigger and smaller?.

7nadin3 [17]

The Moon illusion is the name for this trick our brains play on us. Photographs prove that the Moon is the same width near the horizon as when it's high in the sky, but that's not what we perceive with our eyes. Thus it's an illusion rooted in the way our brains process visual information. Even though we've been observing it for thousands of years, there's still not a satisfying scientific explanation for exactly why we see it.

Hope this helps!
Please give Brainliest!

3 0

2 years ago

Knowledge and skills learned through socialization are an example of

ziro4ka [17]

Answer:

I think no.2 the answer

Because socialization and social resources are both for me

3 0

3 years ago

Which of the following statements is an accurate description of sound transmission through various mediums?

yaroslaw [1]

Answer: The accurate statement which describes the transmission of sound through various medium is D.

Explanation:

Sound is longitudinal wave in which the vibration of particles travels parallel to the propagation of the motion of the wave. It requires a medium to travel. It consists of compression and rarefaction.

Sound insulator prevents the sound to travel for example plastic, wood etc. Sound travels faster in solid medium than in liquid medium. Sound travels faster in liquid than in gas. Less elastic material absorbs sound for example paper in compare to inelastic material.

Therefore, the accurate statement which describes the transmission of sound through various medium is "Sound insulators prevent sound from being transmitted better than elastic solids.

3 0

3 years ago

Read 2 more answers

2. A car accelerates down the road. What is the "reaction" to the tires pushing on the road?

Artist 52 [7]

The answer would be friction

7 0

3 years ago