Newton's Laws 3
What is the formula for mass?
m = F/a
What is wind energy?
Wind energy refers to the process of creating electricity using the wind, or air flows that occur naturally in the earth's atmosphere. Modern wind turbines are used to capture kinetic energy from the wind and generate electricity.
What are some examples of matter as a mixture?
sand, concrete and soil
Out of these three substances: mercury, salt water, oxygen, which one is not a substance?
What is the transfer of internal energy in the form of electromagnetic waves?
Radiation
What is net force?
It is the vector sum of forces acting on a particle.
What are examples of fossil fuels?
Coal, natural gas, oil
Ice is a solid if it melts it is a _______?
liquid
What is density?
A quantitative expression of the amount of mass contained per unit volume .
How does the weight of a object affect buoyancy?
Buoyancy is equal to the weight of the fluid displaced by the object.
If you use the same force to push a car in truck which will have more acceleration? Why?
The car because the car has less mass.
What type of energy is released when a reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity?
Hydropower
What would be a demonstration of graphic changes in state matter?
solid to liquid to gas
If you put a pan on the stove what do you have to do next to conduct heat to the pan?
Turn on the stove to conduct heat from the stove to the pan.
How does movement of heat by convection work?
It is transferred by heat from one place to another by fluids
How do you calculate the weight of an object?
Multiply the mass by 9.8 or to find mass in kg, divide the weight by 9.8 N
Name three different types of energy that can be transformed from one type to another.
Multiple examples
An object has a volume of 64cm and a mass of 34g what is the density?
0.53g/cm
How does the pressure of gas affect volume?
An increase in the number of gas molecules in the same volume container increases pressure. A decrease in container volume increases gas pressure.
In what way does particle motion affect temperature?
When the molecules and atoms vibrate faster, the temperature goes up.
A cat of mass 5kg jumps on a dining table of mass 30kg. As the cat walks around on the table, what is the average force that the table applies to the cat?
50N
What is nuclear energy and what is one reason it has become more attractive in recent years?
The energy released during nuclear fission or fusion, especially when used to generate electricity
It has become much more attractive is that it decreases our dependence on fossil fuels.
If a ball goes though room temperature water, and it take 3 seconds, what happens if the water is heated up, will it take longer for the ball to go though?
No, the ball will go through faster
If there is a cup full to the top with water (25 mL), and you place a ball (10 mL) is put in the cup, how much water will fall out?
10 mL
What types of phase changes can a phase change graph tell you?
Melting, freezing, vaporization, sublimation, etc.