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Hunter-Best [27]
4 years ago
13

A sample of glass has a mass of 15 g and takes up 14.3 cm 3 of space. What is the density?

Physics
1 answer:
Lorico [155]4 years ago
3 0
The answer is 1.05g/cm
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they are used in periscopes,for signalling,in kaleidoscopes,to see round dangerous bends

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How could you weaken the force of gravity between cars and the Earth?<br>**I WILL MARK BRAINLEST**​
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The answer you have selected is correct.

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A one-piece cylinder has a core section protruding from the larger drum and is free to rotate around its central axis. A rope wr
PilotLPTM [1.2K]

Answer:

Magnitude the net torque about its axis of rotation is 2.41 Nm

Solution:

As per the question:

The radius of the wrapped rope around the drum, r = 1.33 m

Force applied to the right side of the drum, F = 4.35 N

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Force on the cylinder in the downward direction, F' = 6.62 N

Now, the magnitude of the net torque is given by:

\tau_{net} = \tau + \tau'

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\tau = Torque due to Force, F

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tau = F\times r

tau' = F'\times r'

Now,

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\tau_{net} = - 4.35\times 1.33 + 6.62\times 0.51 = - 2.41\ Nm

The net torque comes out to be negative, this shows that rotation of cylinder is in the clockwise direction from its stationary position.

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3 0
3 years ago
A Sodium ion has a positive charge because it has
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Explanation:

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A 20.0-kg rock is dropped and hits the ground at a speed of 90.0 m/s. Calculate the rock’s gravitational potential energy before
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Answer:

<span>GPE=81000J or 81kJ</span>

Explanation

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<span>To find H use one of the equation of motion </span>

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<span>Potential Energy = mgh = 20 x 9.8 x 8100 /2(9.8) = 81000 J</span>

5 0
3 years ago
Read 2 more answers
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