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3 years ago

Describe two sources of earth's energy that are not produced

1 answer:

6 0

Here is the answer. Two sources of Earth's energy that are not produced would be Cosmic rays and Tidal Energy. Cosmic rays <span>are high-energy protons and atomic nuclei that come from outside the solar system. Whereas, tidal energy is the energy produced by both the moon (2/3) and the sun (1/3). Hope this answers your question.</span>

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Imagine that you have two marbles on a table. You roll one marbles towards another. When the marble collide, the marble at rest

Alika [10]

Because that's called friction. When to things collide it causes friction which makes them stop rolling>

8 0

3 years ago

Which activities demonstrate speed the most?

blsea [12.9K]

Answer:I think sprinting

Explanation:

6 0

3 years ago

What came first the chicken or the egg

maxonik [38]

Answer:

The Egg

Explanation:

personally the Chicken who would lay the egg would have to come from an Egg itself, then It would have to grow up and then Produce an egg that will produce a chicken and so on.

6 0

3 years ago

A girl is sitting in a sled sliding horizontally along some snow (there is friction present).

Naddika [18.5K]

Answer:

159 N

Explanation:

The force of friction is a resistive force that acts against an object in motion (or on the verge of moving).

There are two types of force of friction:

Force of static friction: it occurs when the object is still at rest
Force of kinetic friction: it occurs when the object is sliding on a surface and it is in motion

In this problem, we are in the 2nd situation, so we want to calculate the force of kinetic friction.

This force is given by:

$F=\mu_k N$

where

$\mu_k$ is the coefficient of kinetic friction

N is the normal force exerted on the object

For the sled and the girl in this problem,

$\mu_K = 0.25$ is the coefficient of kinetic friction

N = 636 N is the normal force

So the force of friction is

$F=(0.25)(636)=159 N$

8 0

3 years ago

The largest number of stable nuclei have an ________ number of protons and an ________ number of neutrons.

xxMikexx [17]

Answer:

83 protons 126 neutrons. Bismuth Atom

Explanation:

The largest number of stable nuclei which could ever exist is the bismuth atom. A nuclei which is higher than that 83 protons is unstable and the nucleus will eventually breakdown through radioactivity.

4 0

3 years ago