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| The BCS theory was developed to explain.. |
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| the lowest possible temperature for matter |
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| What is called the "language of physics"? |
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| the study of matter and energy |
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| Why is the work of theoretical physicists in superconductivity not finished? |
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| There is no complete explanation of how new superconductors work |
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| Aristotle believed that all matter is composed of _________ |
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| Aristotle and his followers were mainly concerned with finding out |
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| why specific events occur. |
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| One of the 1st European scientists to claim publicly that knowledge must be based on observations and experiments was _________ |
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| A surprising aspect of physics is that its results can be described by a small number of relationships, or _____ |
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| In scientific notation, a number between 1 and 10 is multiplied by |
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| a whole-number power of 10 |
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| What is the metric prefix that means 100? |
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| When multiplying quantities expressed in scientific notation that have different exponents, you multiply the values of M and _____ the exponents. |
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| Laboratory instruments must be read _______ to avoid parallax errors. |
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| What is the degree of exactness to which the measurements of a quantity can be reproduced? |
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| When adding or subtracting measurements, first perform the operation and then round off the result to correspond to the _____ value involved. |
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| A variable that can be manipulated in an experiment is |
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| When constructing a graph from data, the range of the x-axis is determined by the range of the ____ |
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| What is indicated by a smooth, upward curving line on a graph? |
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| a direct relationship between y and with the square of x |
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| The slope of a straight-line graph is the vertical change _____ the horizontal change. |
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| A graph that is a hyperbola represents _____ relationship. |
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| To solve the equation vt=d for t, |
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| divide both sides of the equation by v |
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| An equation is wrong if both sides contain... |
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| different units of measurements |
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| A runner is 5.0 km east of another runner, who is 5.0 km east of a parking lot. Where is the first runner with respect to the parking lot? |
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| Distance is a quantity that |
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| A cyclist finishes a 100-km race in 2.7 hours. The average velocity equals |
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| the displacement divided by the total time |
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| If the average velocity of an object is the same for all time intervals, then the object moves |
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| On a position-time graph, the velocity equals |
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| the rise divided by the run |
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| Using ______ rise and run will result in the most accurate slope on a position-time graph. |
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| A runner traveled 15 km east then backtracked 11 km before stopping. The displacement from the original position is |
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| The ___ of any point on a velocity-time graph equals the instantaneous velocity at the time. |
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| The area under the curve on a velocity-time graph equals the |
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| displacement from the original position to its position at the time |
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| A child on a bicycle rides eastward past a house, as a car, also traveling eastward, slowly passes. Which of the following people would perceive the biker as having the greatest velocity? |
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| The slope of the tangent on a position-time graph equals the |
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| The change in a runner's velocity with time is the runner's... |
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| A child lets go of a ball at the top of a driveway. The instantaneous velocity of the ball as the child lets go is |
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| On a velocity-time graph, the slope of the tangent to the curve at a given point is the |
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| instantaneous acceleration |
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| Constant acceleration on a velocity-time graph produces a curve that is |
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| The area under the curve on a velocity-time graph for an object moving with uniform acceleration is the _____ of that object |
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| The slope of a position-time graph is the ____ of an object. |
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| Which best describes the relationship between the final and initial velocities of a uniformly accelerating object? |
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| the final velocity increases as the initial velocity increases |
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| (Ignoring air resistance) If a 10-kg ball and a 200-kg crate were both dropped from the top of a building, the acceleration of the crate would be ______ the acceleration of the ball. |
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| In Greenland, the acceleration due to gravity is ______ the acceleration due to gravity at the Earth's equator. |
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| A toy rocket is launched straight up into the air. When the rocket reaches its max height, its velocity is at its |
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| The total displacement of a toy rocket upon landing is |
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| the attractive force that acts on all objects is |
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| Metals such as copper can be pounded into thin sheets due to |
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| Which of Newton's laws state that an object with no net force acting on it remains at rest or in motion with a constant velocity? |
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| Which law states that the acceleration of a body is directly proportional to the net force on it and inversely proportional to its mass? |
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| Losing your speed as you ride your bike uphill demonstrates Newton's _____ law. |
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| Two teams in a tug of war exert the same amount of force on eachother and the rope doesn't move. Newton's _____ law explains why the rope does not move. |
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| If you push against a wall, the wall pushes back against you with ____ force. |
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| The gravitational force exerted by a large body, such as Earth, is |
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| Mass and velocity are related by |
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| Difficulty in pushing a large crate from rest involves |
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| When the drag force on an object equals the force of gravity, _______ occurs |
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| The effect of air resistance on the tail of a kite is ______ the effect of air resistance on the body of the kite. |
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| If the force of gravity on a balloon is 3000 N, then the lift force provided by the atmosphere is 3300 N, in which direction is the net force acting? |
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| A hiker moves 15 km due east then heads due north for 8 km. What is the direction of the resultant vector? |
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| The downstream velocity of a river that flows south ______ a boat's eastward velocity. |
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| When adding vectors graphically, the length and direction of each vector must |
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| Knowing the magnitude of the hypoteneuse of a right triangle and the side opposite angle Y, you could compute the _____ of angle Y. |
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| The effect of the resultant vector is ______ the effect of the original vectors. |
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| Suppose you pull a wagon along on a horizontal sidewalk. The force that pulls the wagon forward over the sidewalk is the _____ force. |
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| If the horizontal component of a force is positive, then, by convention, the force acts |
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| An object is an equilibrium when |
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| the net sum of the forces is zero |
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| The equilibrant force is ______ the resultant. |
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| equal in magnitude but opposite in direction to |
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| To resolve a force vector into its components, a set of perpendicular axes is drawn. Then the _____ is drawn to scale at the corract angle. |
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| When vectors are resolved into components on an inclined plane, the _____ force is the one that acts along the incline |
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| As the angle of an inclined plane increases, the parallel force ______ and the perpendicular force _______ |
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| For an object moving along a trajectory, the horizontal acceleration of the object ______ as the position changes. |
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| The vertical change in position of an object that is dropped and that of an identical object that is thrown horizintally from the same height... |
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| Suppose an object is dropped from a moving train. The time it takes to fall is... |
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| independent of the observer's position |
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| In trajectory motion, the initial velocity is ____ the final horizontal velocity. |
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| In a projectile motion, the rising and falling times of the object are equal if the launching position is ______ the landing motion. |
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| Where would the pitcher have to aim a fast ball in order to have it pass at the height of the batter's chest? |
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| just above the height of the batter's chest |
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| Momentum can be calculated by multiplying |
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| If no net force acts on a body... |
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| the velocity of the body is constant |
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| The greatest change in momentum will be produced by... |
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| a large force acting over a long time |
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| If an object with a velocity of 50 m/s has the same momentum as that of a 10 kg mass having a velocity of 20 m/s, the mass of the object is |
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| Impulse can be repesented by |
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| force times the change in time |
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| If an object moving at a rate of 20 m/s collides with a stationary object and the two objects move away together, the velocity of the combined objects will be |
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