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yanalaym [24]
2 years ago
11

I need help with this one pls, ty! ASAP

Chemistry
1 answer:
LuckyWell [14K]2 years ago
4 0

Answer:

Explanation:

1. A measure of how quickly velocity is changing is the acceleration

Acceleration is the rate of change of velocity with time. The rate at which a body is changing its velocity is known as the acceleration.

It is measured in the unit m/s²

2. Speed in a given direction is the velocity

Velocity is a vector quantity which measures the magnitude of motion in a specific direction. It is simply speed in a given direction.

When we say a motorcycle travels at the rate of 5m/s due east, we are describing the velocity of such body.

3. Force that resists moving one object against another is the friction

Friction is a force that opposes motion. It prevents a body from moving.

4. Measure of the pull of gravity on an object Weight

Weight is a measure of the amount of gravitational force on a body. It is mathematically expressed as;

         W = mg

W is the weight, m is the mass and g is the acceleration due to gravity

5 Tendency of an object to resist a change in motion is inertia

Inertia is the tendency of body to resist change in motion. It is the ability of a body to remain in a perpetual state of rest.

6 Size is the magnitude

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True

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What element has 80 protons, 81 neutrons, 79 electrons?
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Answer:

The element will be ^{161}_{80}X

Explanation:

Given that,

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Number of electron = 79

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According to atomic number,

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We need to calculate the atomic mass

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Using atomic mass and atomic number

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So, the element will be

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