#1. How does the mass of a toy car affect the distance a piece of wood moves?
Problem:How does the mass of a toy car affect t the distance a piece of wood moves
Hypothesis: I thought that the big red dumb truck would make the block of wood move the farthestbecause it is the biggest and will hit the block with more force
Experiment: CV: degree of the ramp, weight of block of wood, starting point
IV: car
DV: meter stick
Procedure: 1. find block of wood
2.put it at the end of the ramp
3. Push the car down the ramp
4. Measure the distance between the end of the ramp and to the block of wood depending on how far it moved
5. Repeat steps 2 -4 3 times
6. Clean up
Materials:block of wood, 3 cars, ramp, flat surface, tape, scale, meter stick
Conclusion: our hypothesis was correct. The dump truck made the block of wood go the farthest because the dump truck weighed the most and made the block of wood fly the farthest.
Hypothesis: i think it depends on the mass of the car because if its big the wood will move farther.
#2- Problem: What impact does the surface of the track have on the time it takes to reach the bottom?
Hypothesis: I think that the sawdust will make it the fastest because its smoother
Experiment: Materials needed: kleenex box, tape, tracks, sawdust, baby powder, toy car, Timer
1. Gather all materials
2. Place sawdust or baby powder on track spreaded out.
3. Get the timer ready.
4. Place toy car at top of track
5. Time how long it takes to get the car to get to the bottom.
6. Record
7. Do steps 2-6 3 more times
8. Clean up
CV: baby powder, track, sawdust,
Observation: In our experiment we just made a track and put baby powder and sawdust on it and saw which one made the toy car hit the bottom the fastest and the baby powder was the fastest.
1.08 sawdust
.81
1.14
.90
Baby powder
1.14
.80
.84
1.01
Nothing
.80
.97
.78
Conclusion: My hypothesis was incorrect . The sawdust was not the best. It was nothing. If anything I think the sawdust slowed it down.
#3-Problem: what impact does the angle of decent have on the rate of deceleration?
Hypothesis: I think that the first line that we made with tape will make it faster to the 2nd line because its going at a faster speed down the track
Experiment: materials needed: track. Tape. Laptop, car, timer
1.gather all materials
2. Place tape where you need to put it so that you can time where the 1st and 2nd line of tape meet
3. Place car on top of track and when it hits the first line of tape hit the timer and when it hits the other line of tape stop the timer
4. Repeat steps
5. Clean up
CV: car, track
IV: tape
Observation: we just put a race car on top of the track and when it hits the line of tape you time it until it gets to the other line of tape and record how long it takes to get to the other piece of tape
19 miliseconds'
16 milseconds
17 milseconds
17 miliseconds
16 milliseconds
14 milliseconds
Conclusion: for my conclusion our hypothesis was correct. It was faster to hit the the 1st line to the 2nd because the car was going down the track fast so it flew by faster which made the time better
#4- Chain Reaction Contraption Rube Goldberg- It starts off with a ball rolling down a n inclined plane on long track and then hits a piece of wood that’s tied with a string to a can of food. The wood falls off which makes the can start rolling down another piece of wood which hits something else making potential energy then making a ball roll down another inclined plane hitting something which triggers a light to turn on making kinetic energy then the ball rolls down a ruler and hits a switch that makes a piece of wood pop a balloon.
#5-Dear Government,
In today's climate people need growing energy needs and increasing environmental concern.
Solar energy is quite simple. It is the energy produced directly by the sun and collected by normally the Earth.
The sun creates its energy through a thermonuclear process that converts about 650,000,000 tons of hydrogen to helium every second. The process creates heat and electromagnetic radiation. The heat stays in the sun and is good in maintaining the thermonuclear reaction. The electromagnetic radiation including visible light, infra-red light, and ultra-violet radiation, streams out into space in all directions.
Because of the nature of solar energy, two components are required to have a solar energy generator. These two are a collector and a storage unit. The collector collects the radiation that falls on it and converts a fraction of it to other forms of energy (either electricity and heat or heat alone). The storage unit is required because of the non-constant nature of solar energy.
Solar energy can be used for other things besides heating.
one of the most common uses of solar energy today is cooling. Solar cooling is more expensive than solar heating, so it is almost never seen in homes. Solar energy is used to cool things by phase changing a liquid to gas through heat, and then forcing the gas into a lower pressure chamber.
Solar power has two big advantages over fossil fuels. The first is that it is renewable and it is never going to run out. The second is its effect on the environment.
