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oksian1 [2.3K]
3 years ago
15

A teacher performing a demonstration finds that a piece of cork displaces 44.5ml of water. The piece of cork has a mass of 11.1g

. What is density of the cork
Physics
1 answer:
stich3 [128]3 years ago
8 0

Explanation:

Density = mass / volume

ρ = 11.1 g / 44.5 mL

ρ = 0.249 g/mL

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Answer:

r=0.41m

Explanation:

Torque is defined as the cross product between the position vector ( the lever arm vector connecting the origin to the point of force application) and the force vector.

\tau=r\times F

Due to the definition of cross product, the magnitude of the torque is given by:

\tau=rFsin\theta

Where \theta is the angle between the force and lever arm vectors. So, the length of the lever arm (r) is minimun when sin\theta is equal to one, solving for r:

r=\frac{\tau}{F}\\r=\frac{55\frac{N}{m}}{135N}\\r=0.41m

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2 years ago
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Answer:

The answer is "No, Hoverboards are risky, and riders are in danger of falling".

Explanation:

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As we can see that there is heat entering the reservoir so it will be negative while cold reservoir will be positive else the process would be impossible.

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