# Shared Flashcard Set

## Details

Ryan Standard Final
Random Questions Pulled From Old Tests
48
Physics
11th Grade
06/05/2011

## Cards Return to Set Details

Term
 Momentum can be calculated by multiplying mass by ______
Definition
 velocity
Term
 If no net force acts on a body ____
Definition
 the velocity of the body is decreasing
Term
 The greatest change in momentum will be produced by _______
Definition
 a large force acting over a large time
Term
 Impulse can be represented by _____ (formula)
Definition
 (F)(t)
Term
 When a large truck collides head on with a small car the force on the car is _____ the force on the truck.
Definition
 equal to
Term
 When a large truck collides head on with a small car the impulse on the car is _____ the impulse on the truck.
Definition
 equal to
Term
 When a large truck collides head on with a small car the change of momentum on the car is _____ the change of momentum of the truck.
Definition
 equal to
Term
 When a large truck collides head on with a small car the acceleration of the car is _____ the acceleration the truck.
Definition
 greater than
Term
 An internal force ___ the total momentum of a system
Definition
 does not change
Term
 "There is no such thing as suction" What does he mean by that?
Definition
 It is actually just pressure. When the "suction" cup is pushed down, the air inside gets forced out and seals, which leads to the pressure in the space under the cup is now lower because there are less air particles in it. On the outside, there is a standard amount because there are more particles pushing down on the seal than in the contained space. It is just an issue in air pressure
Term
 A glass of water with ice floating in it is filled to the top. When the ice melts will the water overflow, go below, or stay the same?
Definition
 Stay the same. Since water and ice are the same material , it displaces the same amount of itself. When the ice melts, it will displace the same amount of water as it did when it was a solid
Term
 What if the ice had a rock frozen in it first? Whats happens then?
Definition
 The water level would go down because the rock displaces less water than the ice cube itself did.
Term
 What is Archimedes' Principle?
Definition
 The buoyant force of an object is equal to the weight of the liquid it displaces.
Term
 For a floating object the "amount" of water displaced is equal to the ____ of that object
Definition
 weight
Term
 For an object under water the "amount" of water displaced is equal to the ____ of that object
Definition
 volume
Term
 The electrostatic force between two charges located 1 meter apart is 10 N. What will be the force between there two charges when they are located 2 meters apart?
Definition
 2.5 N
Term
 A +2C charge and a -4C charge attract each other with 10 N of force. How much will a -2 C charge and an +8C charge attract each other when placed the same distance apart?
Definition
 20 N
Term
 In a good insulator, the charges are usually ______
Definition
 tightly bound in place
Term
 Which method of charging involves direct contact between objects involved?
Definition
 friction and contact
Term
 Which method of charging does not require objects to ever come in contact?
Definition
 polarization and induction
Term
 Which method of charging doesnt actually cause the object to gain or lose charges (they remain neutral, but act like they are charged)?
Definition
 polarization and induction
Term
 Which method of charging occurs most of the time only with insulators?
Definition
 friction and polarization
Term
 Friction
Definition
 Ripping the tape off the table which rips the electrons off the table
Term
 Induction
Definition
 the pith ball being attracted to the balloon
Term
 Polarization
Definition
 the water stream being attracted by the balloon
Term
 Contact
Definition
 the small circles of paper being attracted to the balloon and making contact and gaining an electron making the paper neutral, thus it falls onto the table and off the balloon
Term
 Difference between an insulator and conductor
Definition
 insulators do not allow electrons to flow easily through them like conductors do. conductors, or metals mostly, have free moving electrons, while insulators don't. this means that the outer shell of conductors, on the atomic level, are not full and have free moving electrons.
Term
 How many constellations are there?
Definition
 88
Term
 What is the Zodiac and why is it special
Definition
 The Zodiac are the 12(13) special constellations that are special because they make up the apparent path of the Sun, moon, and planets across the celestial sphere over the course of the year.
Term
 What is the other name for the North Star
Definition
 Polaris
Term
 How many stars can you see with the naked eye if it was totally dark? Why would it help if it was totally dark?
Definition
 5,000. It helps because there wouldnt be any excess light that would block out any stars
Term
 What is retrograde motion?
Definition
 It refers to the path planets take in the sky. If a planet is retrograding, then it appears to be moving backward.
Term
 How did Ptolemy explain retrograde motion?
Definition
 [image]He explained it by using epicycles, he used Jupiter and said that as it traveled around earth, it also travels in a circle on it's orbit
Term
 How does Copernicus explain retrograde motion for Mercury and Venus?
Definition
 Mercury and Venus orbit the Sun with orbits smaller than Earth’s.
Term
 What is the "Problem of Parallax"
Definition
 There is no parallax
Term
 Which two cosmologies have it as a problem and why would they? What is Copernicus' answer to it?
Definition
 Aristarchus and Copernicus do because they believe in helio-centric models. Copernicus answers the problem of parallax by assuming that the universe is very large, perhaps even infinite, so we can not see it, although its taking place.
Term
 What is an eccentric? Who uses it?
Definition
 Ptolmey. He thought everything orbited the earth, but the earth was not the center of the orbit so he used eccentrics to explain it.
Term
 3 things Galileo saw through his telescope
Definition
 1. Moons of Jupiter- proved that things revolve around other things than the Sun 2. Craters on the Moon- the moon isnt a perfect spherical model, yet has marias (seas) and craters 3. Sunspots - proves the sun has imperfections and sun spots that generate radiation
Term
 Two interesting things about Tycho Brahe
Definition
 1. Lost his nose in a duel 2. Tycho Brahe made a remarkable star catalogue of over 1000 stars. This was not the biggest catalogue in the number of stars, but in accuracy. His improvements of methods and accuracy in observations was very significant.
Term
 Kepler's Three Laws
Definition
 1. Law of Ellipses 2. Law of Equal Areas 3. The Law of Harmony
Term
 What does the Big Bang Theory say about the beginnings of the universe? How old is it?
Definition
 It was created from nothing and space kept expanding at an incredibly fast pace. about 14 billions years
Term
 How can we tell the universe is expanding?
Definition
 No matter where you look in the sky, nearly all galaxies are moving away from us, therefore the farther away a given galaxy is, the faster it is moving away
Term
 2 pieces of evidence that support the Big Bang Theory
Definition
 1. The dark night sky 2. Evolution of stars, galaxies, etc.
Term
 Frozen Frictionless Pond question
Definition
 In a closed system, the total momentum of the system is conserved. The system is you and the rock. Before you throw the rock, everything has a momentum of zero. After you throw the rock, due to the conservation of momentum, your total momentum will still be zero despite the fact that you now have greater velocity in the opposite direction of the rock. You will get off the pond, but the total momentum of the system will still be zero. But if you multiply the mass by the velocity of the rock & add it to the mv of you, it will equal zero
Term
 Conservation of Momentum
Definition
 cant be created nor destroyed (only change forms)
Term
 Conservation of Energy
Definition
 the total energy remains the same throughout a system
Term
 Pascals Principle
Definition
 the pressure is transmitted evenly through a liquid. That's why when you inflate a balloon with air, it expands evenly in all directions
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