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By holding a magnifying glass 32 from your desk lamp, you can focus an image of the lamp's bulb on a wall 1.8 from the lamp. What is the focal length of your magnifying glass?
A bullet with mass 4.59 g is fired horizontally into a 1.958-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
A small, rigid object carries positive and negative 3.00-nC charges. It is oriented so that the positive charge has coordinates (?1.20 mm, 1.00 mm) and the negative charge is at the point (1.50 mm, ?1.30 mm).
A ball thrown upward returns to the same level after 4s in the air. How long would that ball take to reach the same level
a person of mass 50 kg has a wavelength of 4.42 x 10^-36 m when running. how fast is she running
A white billiard ball with mass mw = 1.57 kg is moving directly to the right with a speed of v = 3.43 m/s and collides elastically with a black billiard ball with the same mass mb = 1.57 kg that is initially at rest. What is the final speed of the..
A solid sphere is released from rest and allowed to roll down a board that has one end resting on the floor and is tilted at 22° with respect to the horizontal. find the sphere's speed when it reaches the lowest end of the board
assume that the tale applies a constant force of friction of 0.5 N block. if the block compresses the spring by 3cm after hitting it, what was the speed of the ball(hit spring)
Two parallel conductors carrying current in the same direction attract each other. If they are permitted to move toward each other, the forces of attraction do work. Where does the energy come from? Does this contradict the assertion in that magne..
An emf of 22.0 mV is induced in a 497 turn coil when the current is changing at a rate of 9.0 A/s. What is the magnetic flux through each turn of the coil
Drag racing combines the reflexes of the driver with a powerful engine to propel a specially designed car across a quarter mile as quickly as possible. What is the time for the car to go the quarter-mile
Two loudspeakers, 5.0 m apart and facing each other, play identical sounds of the same frequency, What is the frequency of the sound (in Hz)
a wooden box on a wooden table is pulled at constant speed by a 10n force at a 30 degree angle. what is the mass of the
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