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Damion Dooley

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โˆ™ 2021-10-06 18:34:25
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Cards in this guide (23)
A form of energy due molecular motion

Heat is the form of energy due to molecular motion. When energy is added to an object its molecules move faster and heat is generated.

How could you increase the kinetic energy of a wagon without increasing its mass

By increasing its speed, or velocity.

What is the rlationship between force and acceleration

force =mass x acceleration

therefore mass = force /acceleration

and acceleration = force/mass

Is the total mass and energy in the universe constantly changing

The Law of conservation of mass-energy indicates that the mass-energy of the universe is constantly changing to maintain the mass-energy constant.

Name the two forces that can affect an object's velocity

friction and gravity

How do you calculate vaparization heat of water

To determine the heat of vaporization you must first determine the amount of heat the substance gave off to water by multiplying the mass of water by the change in temperature and the specific heat capacity of water. You need to divide this number by the number of moles of the unknown substance.

How does a substance change when its thermal energy changes

For example, when heat energy (thermal energy) is added to a substance, either its temperature will increase, or it will change its state (as when ice is melted).

What is the force exerted by an object

Actually, when we say force exerted it is the what we called tension. Tension is the opposite type of compression. But it doesnt mean it redirects the word "force exerted" but the term magnitude of the pulling force exerted by an object.

this often happens on strings,cable,chain etc.

This would be its system of equilibrium:

A system is in equilibrium when the sum of all forces is zero.


Thermal conduction is the transfer of energy

Yes it is.

Heat is form of energy and can be transferred through 3 mode

Conduction Convection and Radiation

You test a machine and find that it exerts a force of 5 N for each 1 N of force you exert operating the machine What is the actual mechanical advantage of the machine

The mechanical advantage is 5.

Mechanical Advantage = Output Force/Input Force

What are three ways thermal energy can be transferred from one substance to another

Through conduction, convection, and radiation.

On what point does a lever point

A lever pivots on its fulcrum.

If the temperature is 79 degrees Fahrenheit outside what is the temperature in degrees Celsius

79F = 26.1C

A car rolling down the hill is an example of

Kinetic energy.

Is perspex a good conductor of heat

No, it's a thermal insulator.

Is swimming potential energy or kinetic energy

potential energy is stored energy and kinetic energy is being used.

So it is kinetic.

What is the relationship exists between the force exerted on a spring and the resulting elongation of the spring

F = kx

where F = force, k = spring constant or spring stiffness, x = elongation

Why if an object's mass decreases acceleration increases

Assuming constant Force, F = ma. When m decreases, to keep constant F, a increases.

How fast is 116 kph

116 kilometers per hour (kph) is 72.1 miles per hour.

What kinda of machine is made of two or more simple machines

A complex machine.

What is the point at which the net flow of thermal energy between two objects at the same temperature is zero

When the temperature of the two objects is equal, the Thermal Flow will stop.

What is the term of Convection Conduction and Radiation

Convection, conduction, and radiation are all methods of heat transfer.

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