Conceptual Physics Day 5 Review Sheet

Conceptual Physics Day 5 review Sheet

1. Name three examples (of different phenomena) to which the inverse square law applies:
2. Gravity______Sound______
3. ______Light______
4. ______Heat______

1. A 10kg mass on Earth weighs
2. 20 pounds
3. 5 pounds
4. 10 pounds
5. 100 pounds

1. A 1600 pound weight is carried by rocket into space. As it flies upward, the force of gravity acting on it changes. Fill in the following table and make a quick sketch of the graph of weight versus distance from the center of the Earth.

Add title and axes labels, at a minimum

1. If I double the mass of an object, what happens to its weight?___Doubles______
2. If I double the mass of an object, what happens to its mass?____Doubles______
3. If I double the mass of the Earth, what happens to the weight of an object sitting on the Earth?_____Doubles______
4. If I double the mass of the Earth, what happens to the mass of an object sitting on the Earth?____No Change______
5. If I double the distance between an object and the Earth, what happens to the mass of the object?___No Change______
6. What is Mr. Davis’s cat’s name?______Mwane______
7. If I double the distance between me and the Sun, how much does the amount of heat I receive change?______Goes down by 4______
8. If I triple the distance between my bread and the elements of my toaster, how does the amount of heat my toast receives change?_____Goes down by 9______
9. What angle do I launch a projectile at to keep it in the air for the longest time?______

______90 degrees______

Brendan and Noah and the Big Rock

1. What is the momentum of a 100kg rock moving downhill at 20m/sec?__2000 kgm/sec______
2. The 100kg rock of problem (13) hits a 100kg Brendan. The rock stops and the Brendan starts rolling downhill. What speed is the Brendon moving at if the only effect is due to changes in momentum?______20m/sec______
3. The 100kg Brendan now hits a 75kg Noah. The Brendan stops and now the Noah starts rolling. What will the Noah’s speed be?___26.7m/sec______

1. A 10,000kg rocket moves through space by firing 100,000kg of fuel out the back at 10m/sec.
2. What is the momentum of the fuel?____1,000,000______
3. What is the resultant momentum of the rocket?___1,000,000______
4. What is the resultant speed of the rocket?______100m/sec______

1. If angle 1 is 30 degrees, what is angle 3? ____60 degrees______

1. Refraction is
2. The bouncing of light off a surface
3. The focusing of light by a mirror
4. The bending of light moving from one medium to another
5. The heating of an object in a flame.

1. Reflection: The angle____ of reflection______equals the angle______of incidence______as measured from the normal______.

1. What are three examples of refraction?
2. _Stick in water______rainbow______
3. ______sunset / sunrise______
4. ______Prism______

1. If the pressure goes down, what happens to the volume of something that can expand or contract?__Goes down______

1. If the pressure goes down, what happens to the temperature of something that cannot expand or contract?__Goes down______

1. If I open a jar under pressure in outer space, what happens to the temperature and pressure in the jar?
2. The pressure goes up and the temperature goes up
3. The pressure goes down and the temperature goes up.
4. The pressure goes up and the temperature goes down.
5. The pressure goes down and the temperature goes down.
6. Can sound pass through
7. Air? __X___Yes ______No
8. Water? __X___ Yes ______No
9. Ground? __X___Yes ______No
10. Metal? __X___Yes ______No
11. Vacuum? _____Yes ____X____ No

1. What causes an echo?
2. Reflection of sound off a surface
3. Refraction of sound due to different temperatures
4. Focusing of sound due to building structures
5. Resonance of sound causing amplification

1. The Big Bang
2. Assumes that the universe has existed forever
3. Suggests that the universe as we know it works in a big recurrent cycle
4. Indicates that the universe had a clear beginning
5. Explains the scientific basis for UFO sightings

1. If striking one tuning fork causes another one nearby to vibrate, the most likely explanation for this is that
2. The two tuning forks were made by the same manufacturer.
3. The two tuning forks are resonating at the same frequency.
4. The first tuning fork is causing the table to vibrate which causes the second tuning fork to vibrate at its own frequency.
5. The two tuning forks are both at the same temperature.