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physics exam-09

dexheimer

QuestionAnswer
Greek philosophers thought that ________ occurred because an element traveled in a straight line to its own natural place motion
Galileo argues that the planets circled the _________ sun
The unit of speed, m/s, is an example of a ________unit derived
the degree of exactness to which the measurement of a quantity can be reproduced is called_________ precision
A variable that can be manipulated in an experiment is the ____________variable independent
when constructing a graph from data, the range of the x-axis is determined by the range of the _________variable independent
A graph that is a hyperbola represents an _________ relationship inverse
_________is considered to be the father of modern experimental science Galileo Galilei
Physics is the study of_________ matter and energy
In scientific notation, a number between 1 and 10 is multiplied by________ a whole-number power of 10
The base SI unit for time is the _________ second
The slope of a straight-line graph is the rise_________the run divided by
The metric prefix that means 1/1 000 000 000 is_________ nano
Describe the difference between base units and derive units base is what you start with like m and s, derived is the finish like m/s
Difference between precision and accuracy precision is doing something multiple times and hitting it in the same area, accuracy is doing something once the way it should be
Physicists study problems using _________ the Scientific Method
Displacement is to distance as velocity is to_________ speed
The _________ of an object is equal to the product of its average velocity and the time interval displacement
The ratio of chance in velocity to the time interval in which the change is made is defined as_________ average acceleration
If a truck has a negative velocity and a negative acceleration, the truck is _________ in the negative direction speeding up
How can an object have a negative position if the object is to the left of the origin
The downstream velocity of a river that flows south_________a boat’s eastward velocity has no effect on
When adding vectors graphically, the direction and length of each vector must_________ not be changed
You walked 10km west and ran 10 km north. During each part of the journey, the _________was the same. distance
The magnitude of the resultant vector is_________ calculated using the Law of Cosines
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? 10km east of the lot
After a bike ride, your displacement is 10km, 30 degrees east of north. In which direction is your displacement greatest north
A swimmer wants to swim due east in a stream that flows south. In which direction should the swimmer swim? northeast
The vertical and horizontal components of a vector are both negative values in a coordinate system. If the vector is in quadrant III, in what direction does the x-axis point? west
The slope of the tanger line to a curve of a position-time graph instantaneous velocity
change of position of an object displacement
displacement divided by the time interval during which the displacement took place average velocity
motion in which equal displacements take place in successive equal time periods uniform motion
change of velocity divided by the time interval during which the change took place average acceleration
the slope of the tangent to a curve of a velocity-time graph instantaneous acceleration
motion that is described by a line of constant slope on a velocity-time graph constant acceleration
the constant acceleration that acts on falling bodies acceleration due to gravity
On a position-time graph, the average velocity equals_________ rise divided by the run
A child drops a ball. The instantaneous velocity of the ball as the child lets go is_________ zero
A child drops a ball. The instantaneous acceleration of the ball as the child lets go is_________ -9.8m/s^2
A toy rocked it launched vertically upward. When the rocket reaches its highest point, its velocity is_________ zero
According
to Newton’s_________law, and object with no net force action on it remains at rest or in motion with a constant velocity first
Losing speed as you ride your bike uphill demonstrates Newton’s_________law. second
If you push against a wall, the wall push back against you with_________force. equal
An object is in equilibrium if_________ the net force on it is zero
the gravitational force exerted by a large body, such as earth, is_________ weight
Mass and weight are related by_________ the force of gravity
If the weight of a balloon is 3000N and the lift force provided by the atmosphere is 3300 N, in which direction is the net force acting? upward
When the drag force on an object equals the force of gravity, the object attains_________ terminal velocity
The period of a simple pendulum depends upon_________ the length of the pendulum
to produce mechanical resonance, the time between applied forces must equal the_________of the object period
The equilibriant force is_________the resultant equal in magnitude but opposite in direction to
As the angle of an incline plane increases, the parallel component of the weight force_________and the perpendicular component of the weight force_________ increases,decreases
The horizontal acceleration of a projectile_________as its position changes is zero
The initial horizontal velocity of a projectile is_________its final horizontal velocity equal to
The rising and falling times of a projectile are equal if the launching position is_________the landing position the same height as
For a fast ball to pass the height of a batter’s chest, the pitcher must aim the ball_________ just above the height of the batter’s chest
An object in circular motion travels a distance of_________during its period 2pir
To start or stop rotation, the force applied to an object must_________ have a component that is perpendicular to the lever arm
During its orbital period, as a planet moves closer to the sun, the orbital velocity of the plant_________ increases
According to Newton’s law of universal gravitation, the force of attraction between any two masses is directly related to the_________ velocity of the two masses
as the distance between two bodies increases, the force of attraction between the bodies_________ decreases
Astronauts is an orbiting space shuttle experience a sensation of weightlessness because_________. the space shuttle is falling freely toward earth
anything that has mass is surrounded by a _________ gravitational field
the force of gravity exerts a_________on an orbiting satellite centripetal force
The attractive force between two objects is a measure of_________ gravitational mass
The linear momentum of an object can be calculated by multiplying the mass of the object by its_________ velocity
The greatest change in momentum will be produced by a _________ large force acting over a long time
Impulse can be represented by_________ F delta t
When a golf club hits a golf ball, the change in momentum of the ball is _________ the change in momentum of the club equal to
A system is closed if_________. the system does not gain or lose mass
An internal force_________the total momentum of a closed system does not change
A person is standing on roller blades and is holding and is holding a heavy medicine ball. If he throws the medicine ball horizontally to the right, what will be his resulting motion? to the left
Two moving objects collide and move on paths that are 120 degrees apart. The total momentum of the objects after the collision is _________ the momentum before the collision equal to
In a closed and isolated system, the sum of all the individual_________remains constant momenta
Any object that has energy has the ability to_________ produce a change
If the environment does work on a system, _________ the energy of the system increases
When a force is exerted on an object, work is done only if the object_________ moves
In which of the following situations is no work done on a football? carrying the football down the field
In which of the following situations is work done on the football by a person? picking up the football
In which of the following situations is the work done on the football by gravity? dropping the ball
One definition of _________is “work done per unit time” power
A machine with a mechanical advantage greater than 1 increases force
For an ideal machine efficiency is always_________percent 100
If the mechanical advantage of a machine is less than 1,effort force is _______ than resistance force greater
A wedge used to split wood is a _______machine simple
A pair of gears make up a _______machine compound
When you throw a ball into the air, its mechanical energy at any point is the _______in its kinetic energy and gravitational potential energy sum
As an object falls towards Earth, the gravitational potential energy of the object _______ decreases
The total amount of energy in an isolated, closed system _______constant remains
If a tabletop is used as a reference point in a mechanical-energy problem, an object lying on the tabletop has a gravitational potential energy_______ equal to zero
The measure of hotness of an object is its_______ temperature
The amount of heat needed to melt 1kg of a substance is the_______ heat of fusion
A heat engine continuously converts_______ thermal energy to mechanical energy
Entropy is the measure of a systems_______ disorder
Energy that flows as a result of a difference in temperature is called_______ heat
Two objects are in thermal equilibrium if they_______ are at the same temperature
According to the second law of thermodynamics, natural processes go in a direction that maintains or _______the total entropy of the universe increases
The total increase in the thermal energy of a system is the work done on it _______the heat added to it plus
A _______is a refrigerator that can be run in two directions heat pump
An increase in the average kinetic energy of particles means an increase in _______ temperature
Convection typically takes place in _______ fluids
A thermometer is used to measure_______ temperature
Created by: rangerlove13
 

 



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