3 years ago

An arrow leaves a bow at 60 m/s at an angle of 30 degrees to the horizon.

Physics

1 answer:

Orlov [11]3 years ago

4 0

Answer: 11

Explanation:

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The railroad tracks will expand because the heat waves make them bigger

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John flies directly east for 20km, then turns to the north and flies for another 10 km before dodging a flock of geese. what’s t

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30 points - how do I do 2 b and c?

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1. its must be B and 2. must be C

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An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s 1045 rad/s ). If a particular disk is

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Answer:

The magnitude of the average angular acceleration of the disk is $4139.74\ rad/s^2$ .

Explanation:

Given that,

Angular velocity, $\omega_i=968.7\ rad/s$

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Time, t = 0.234 s

We need to find the magnitude of the average angular acceleration of the disk. It is given by change in angular velocity per unit time. So,

$\alpha =\dfrac{\omega f}{t}\\\\\alpha =\dfrac{968.7\ rad/s}{0.234\ s}\\\\\alpha =4139.74\ rad/s^2$

So, the magnitude of the average angular acceleration of the disk is $4139.74\ rad/s^2$ .

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3 years ago

How much heat would be needed to completely evaporate 31.5 g of boiling water at a temperature of 100 "C? Express your answer in

BaLLatris [955]

Answer:

Heat needed = 71.19 J

Explanation:

Here heat required can be calculated by the formula

H = mL

M is the mass of water and L is the latent heat of vaporization.

Mass of water, m = 31.5 g = 0.0315 kg

Latent heat of vaporization of water = 2260 kJ/kg

Substituting

H = mL = 0.0315 x 2260 = 71.19 kJ

Heat needed = 71.19 J

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