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belka [17]
4 years ago
11

When an object loses electrons, it acquires a(n) ____________________ electric charge?

Physics
1 answer:
madam [21]4 years ago
4 0
It acquires a positive electric charge.
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What is the source of all mechanical waves?
igor_vitrenko [27]
The answer is vibration
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3 years ago
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The Kentucky Derby is one of the most exciting horse races run every year. In 1973, the horse Secretariat set a record that stil
lawyer [7]

Answer:

69.44kJ

Explanation:

Kinetic energy is expressed as;

KE = 1/2mv^2

m is the mass = 500kg

v is the velocity

Get the velocity;

v = displacement/time

velocity = 2000/120

velcoity = 16.7m/s

Gt the kinetic energy

KE = 1/2 * 500 * 16.7²

KE = 250*277.78

KE = 69,444.4Joules

Since 1000J = 1kJ

69,444.4Joules = 69,444.4/1000

69,444.4Joules = 69.44kJ

Hence the Secretariat's average kinetic energy is  69.44kJ

4 0
3 years ago
Imagine two people , each seating on an office chair with wheels. One pushes against the other Describe what happen next Explain
zaharov [31]

Answer:

The two chairs and those sitting on them will move in nearly opposite directions at almost the same speed (assuming that the wheels can only move into two directions - front or back and assuming that the weight of both people are almost the same)

Explanation:

Newton's Third Law states that If an object X exerts a force on object Y, then object Y must exert a force of equal magnitude and opposite direction back on object X.

In other words, when force is applied from source A at B and in direction of B, B also simultaneously returns the force on B and in the direction of B.

This law applies when we jump off the ground when a rocket takes off from the earth into space, etc.

While standing, the body pushes on the earth with a force equal to its own weight. If the ground underneath the body does not meet that force in an equal and opposite direction,  both standing on the earth will fall into the earth, with the earth caving underneath it.

You can see why it is important to have a strong foundation for a building and why the depth and strength of the foundation will depend on how much weight is going on it.

Cheers!

3 0
3 years ago
Name two processes that release nuclear energy?
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Answer:  Nuclear energy is released from an atom through one of two processes: nuclear fusion or nuclear fission. In nuclear fusion, energy is released when the nuclei of atoms are combined or fused together. This is how the sun produces energy. In nuclear fission, energy is released when the nuclei of atoms are split apart.

Let me know if it helps!

7 0
3 years ago
13. Litmus paper can be used to determine if a solution is an acid or a base. There are two types of
Over [174]

Answer:

The main use of litmus is to test whether a solution is acidic or basic. Light Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple.

Explanation:

7 0
3 years ago
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