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A 1.0cm -tall candle flame is 2.0m from a wall. You happen to have a lens with a focal length of 42cm . (a) How many places can you put the lens to form a well-focused image of the candle flame on the wall?
Waves that are emitted in phase from two sources will undergo constructive interference when the paths from the sources differ by
A man applies a force of F = 3.00 102 N at an angle of 60.0° to a door, x = 1.90 m from the hinges. Find the torque on the door
A tiny source is emitting electromagnetic radiation equally in all directions. What is the power with which the source emits radiation
Metal disks are initially spinning on cushions of air, in a standard rotational dynamics apparatus. What is the final angular velocity of the two disks
A beaker with a capacity of exactly 100mL contains 99.5mL of ethanol at 19degrees C. If it's temperature rises at what temperature will it overflow? (Ignore expansion of the beaker). The answer is not 23.6 degrees C so I am not sure how to figure it ..
A spring with spring constant 15N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. What is its the mass of the ball
A person uses corrective glasses of power -8.5 D. If the glasses are worn 2.0 cm from the eye, what is the person's far point without glasses
An automobile of mass 1500 kg and a truck of 3500 kg collide at an intersection. What is the velocity (magnitude and direction) of the vehicles immediately after collision
A submarine is 304 m horizontally out from the shore and 126 m beneath the surface of the water. A laser beam is sent from the sub so that it strikes the surface of the water at a point 232 m from the shore. If beam just strikes the top of a building..
A plastic light pipe has an index of refraction of 1.53. For total internal reflection, what is the minimum angle of incidence
A carnot engine operates between reservoirs whose temperatures are650K and 350K. Which change gives the greatest improvement
A potential difference is applied between the electrodes in a gas discharge tube. In 1.7 s, 3.2 1016 electrons, What is the current in the tube
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