3 years ago

What happens to the object when positive velocity and positive acceleration occur?

Physics

1 answer:

erik [133]3 years ago

7 0

The object increases in speed

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The ______________ scale has a single “anchor” point at the triple point of water.

Marysya12 [62]

The "Temperature" scale has a single "anchor" point at the triple point of water.

In short, Your Answer would be "Temperature"

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4 years ago

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A rotating wheel requires 3.05-s to rotate through 37.0 revolutions. Its angular speed at the end of the 3.05-s interval is 97.9

Setler79 [48]

Answer:

$\alpha=14.2rad/s^2$

Explanation:

The formula that relates angular displacement with angular acceleration is:

$\Delta \theta=\omega_i t+\frac{\alpha t^2}{2}$

We can obtain $\omega_i$ from the definition of angular acceleration:

$\alpha=\frac{\Delta \omega}{\Delta t}=\frac{\omega_f-\omega_i}{t}$

$\omega_i=\omega_f-\alpha t$

Putting all together:

$\Delta \theta=(\omega_f-\alpha t) t+\frac{\alpha t^2}{2}=\omega_f t-\frac{\alpha t^2}{2}$

Which, since we want the angular acceleration, is:

$\alpha=\frac{2(\omega_f t-\Delta \theta)}{t^2}$

And for our values is:

$\alpha=\frac{2((97.9rad/s)(3.05s)-(37(2\pi rad)))}{(3.05s)^2}=14.2rad/s^2$

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3 years ago

Which of the following is NOT an insulator?

sergejj [24]

I don’t know how air would be an insulator so I’m guessing that one isn’t

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Question 2 of 20 When a substance changes from a liquid to a gas, what happens to the motion of its particles? O A. They move at

Nuetrik [128]

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B. They move more quickly and independently.

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3 years ago

A bulldozer uses a 500 N force to push a load of dirt 16 m to the worksite. How much work

strojnjashka [21]

Explanation:

Force (F) = 500 N

Distance (d) = 16 m

work done (w) =?

We know that

w = F * d

= 500 * 16

= 8000 Joule.

The bulldozer performs 8000 Joule.

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