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2 years ago

_____ is the kinetic energy of an object, proportional to the object's moment of inertia and the square of its angular velocity.

1 answer:

7 0

Rotational kinetic energy <span>is the kinetic energy of an object, proportional to the object's moment of inertia and the square of its angular velocity.</span>

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1. How does RNA differ from DNA?

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The answer is c) RNA contains uracil and ribose.

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When making sweet tea, McDonalds adds the sugar while the tea is hot. The sugar is added at this step so that the tea can be as

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Explain the process that causes dew to form on blades of grass?

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<span>Heat is radiated, atmospheric moisture condenses at a rate greater than that at which it can evaporate, resulting in the formation of water droplets.</span>

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A 24 kg child slides down a 3.3-m-high playground slide. She starts from rest, and her speed at the bottom is 3.0 m/s.a. What en

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Answer:

(a) Potential energy of the child is converted into the kinetic energy at the bottom off the slide and a part of which is lost into friction generating heat between the contact surfaces.

(b) $U=668.16\ J$

Explanation:

Given:

mass of the child, $m=24\ kg$

height of the slide, $h=3.3\ m$

initial velocity of the child at the slide, $v_i=0 m.s^{-1}$

final velocity of the child at the bottom of slide, $v_f=3\ m.s^{-1}$

(a)

∴The initial potential energy of the child is converted into the kinetic energy at the bottom off the slide and a part of which is lost into friction generating heat between the contact surfaces.

Initial potential energy:

$PE=m.g.h$

$PE=24\times 9.8\times 3.3$

$PE=776.16\ J$

Kinetic energy at the bottom of the slide:

$KE=\frac{1}{2} m.v^2$

$KE= 0.5\times 24\times 3^2$

$KE= 108\ J$

(b)

Now, the difference in the potential and kinetic energy is the total change in the thermal energy of the slide and the seat of her pants.

This can be given as:

$U=PE-KE$

$U=776.16-108$

$U=668.16\ J$

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2 years ago

What is a/an Diorama???

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A three-dimensional miniature or life-size scene in which figures, stuffed wildlife, or other objects are arranged in a naturalistic setting against a painted background.

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