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### 55 Cards in this Set

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• Back
 What is the function of a generator? mechanical to electrical A circuit that has 2 or more branches to flow through is.... parallel circuit Objects that keep their magnetic properties permanent magnets ride a bike up and down a hill.... negative then positive formula for speed speed=distance/time A single point on a time graph tells instantaneous speed When a force is exerted on a box.... action/reaction To which of the following is convection? liquids and gases If gravity did not affect the bath of a horizontally thrown ball... it would keep going horizontally abbreviation for momentum? P=momentum Newton's First Law of Motion is also called the... Law of Interia For an object, the greater the force the greater the... acceleration the speed on a speedometer... instantaneous speed the amount by which a machine multiples a effort force... mechanical advantage what is the acceleration due to gravity? 9.8m/s2 Which would be the best insulator? air a real car moving at 10km per hour has more momentum than a toy car b/c it has... greater mass a path that allows only one route for electricity... series circuit The unit for momentum is kgm/s2 which of the following is a device to open an overloaded circuit? circuit breaker a static discharge differs from a electric current.... blast for only a fraction of a second if a weightlifter is holding barbells above his head what does he have to do to do work? move to side to side the size of gravitational force depends on.... masses and the distances between them.. the unit for power watt a merry go round horse moves at a constant speed with changing.... velocity a bus engine changes chemical potential energy so the bus moves and releases kinetic energy 3 meters per second north velocity when 2 balls collide the momentum of the balls after the collision is explained by... the law of conservation of momentum a bad condutor air the SI unit for energy joule energy from the sun travels to the earth as... radiate energy in the absence of air, a penny and a feather will drop... at the same rate which does not make use of electric energy... piano a horizontal line on a velocity timegraph shows _____ acceleration.. zero a bar that is free to pivate around a fixed point lever a transformer that increases voltage step up transformer the equation used to find acceleration? vf-vi/t the rate at which work is done power the statement that voltage differance is equal to current is... Ohm's law a material that reduces the flow of heat insulator the magnetic force of a magnet is stongest at the poles a device that increases or decreases voltage in a powerline transformer a winding mountain road incline plane in the u.s. powerlines can carry as much as 750,000 a transformer lowers it to 120 volts increasing the speed of an object does what to it's pontential energy? has not effect a lever with mechanical advantage greater than one is used to increase force a current that reverses direction in a regular pattern alternating a device that does work with only one movement and changes direction and force.. simple machine a feather will fall slower than a brick b/c of air resistance Motion is a change in position a material through which electrons do not flow insulator an object in freefall appears weightless an incline plane rapped around a cylentrical post is a screw the function of an electric motor is to change electrical energy into mechanical energy the function of generator is to change mechanical into electrical