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4 years ago

Determine the stiffness of the spring to hold the 85-kg crate in the position shown.

Physics

1 answer:

GalinKa [24]4 years ago

5 0

Correct position spring hold it

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A typical ten-pound car wheel has a moment of inertia of about 0.35kg⋅m2. The wheel rotates about the axle at a constant angular

QveST [7]

Answer:

The rotational kinetic energy of the rotating wheel is 529.09 J

Explanation:

Given;

moment of inertia I = 0.35kg⋅m²

number of revolutions = 35.0

time of revolution, t = 4.00 s

Angular speed (in revolution per second), ω = 35/4 = 8.75 rev/s

Angular speed (in radian per second), ω = 8.75 rev/s x 2π = 54.985 rad/s

Rotational kinetic energy, K = ¹/₂Iω²

Rotational kinetic energy, K = ¹/₂ x 0.35 x (54.985)²

Rotational kinetic energy, K = 529.09 J

Therefore, the rotational kinetic energy of the rotating wheel is 529.09 J

7 0

3 years ago

A few weeks later, you attend a rock concert at which the band plays at 120dB. How many times more intense is the rock concert t

wel

It would be more than it was but by how much would be 9

5 0

3 years ago

How much energy must be added to a 2-kg piece of glass with a specific heat

MAXImum [283]

Answer:

51520J

Explanation:

The energy added to the piece of glass is also called heat needed to increase its temperature from 10°C to 50°C and it depends on the mass, specific heat capacity and the change in temperature.

Q=m.c.ΔT

Q=(2kg).(644J/(kg°C)).((50°C)-(10°C))

Q=51520J

3 0

3 years ago

Which explains why light bends when it passes from air to water?

Serggg [28]

Answer: D
Key thing to keep note, is "refraction"...
Look at some experiments on YouTube, it's helps me a lot.

4 0

3 years ago

Read 2 more answers

He pictures show a grassy field that has been abandoned. Which best explains why this is an example of increasing entropy?

solmaris [256]

<h2>Answer:</h2>

The correct answer is option D. Which is "Over time, the lawn has naturally become disorderly".

<h3>Explanation:</h3>

Entropy, the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.
It is also a measure of the molecular disorder, or randomness, of a system.
According to above definitions of entropy option D is correct.
<u>So entropy of system is randomness/disorder that is increasing with time in case of lawn.</u>

6 0

3 years ago