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When an object is placed 6.0cm in front of a converging lens, a virtual image is formed 9.0 cm from the lens. What is the focal length of the lens?
A radar antenna is tracking a satellite orbiting the earth. At a certain time,the radar screen shows the satellite to be 162 km away.The radar antenna is pointing upward at the angle of 62.3 degrees from the ground.find the x and y components(in k..
An ideal gas is kept in a container of constant volume. Thepressure of the gas is also kept constant. The number of moleculesin the gas is halved. what is the final rms speed
A train on one track moves in the same direction as a second train on the adjacent track. The first train, which is ahead of the second train and moves with a speed of 30.4 m/s, blows a horn whose frequency is 124 Hz. If the frequency heard on the se..
A galvanometer has a coil resistance of Rgalv = 89.7 ?. It is to be made into an ammeter with a full-scale deflection equal to I = 2.35 A. If the galvanometer deflects full scale for a current of Igalv = 135 mA, what size shunt resistor should be use..
You are designing a lathe motor, part of which consists of a uniform cylinder whose mass is 90 kg, At what rate is the angular momentum increasing
two large parallel conducting plates are 12 cm apart and have charges of equal magnitude and opposite sign on their
A circuit consists of a 215-Ω resistor and a 0.200-Hinductor. These two elements are connected in series across generator that has a frequency of 130 Hz and a voltage of 245 V.
Suppose you are given two bars, one is anelectric dipole and the other is a magnetic dipole. Can you think of some simple experiments that would help you figure out which is which using a battery or a balloon?
The momentum of a soccer player is 100kg-m/sec and he hits a soccer ball with a mass 0.1 kg, find the speed(velocity) of the soccer ball
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. find How long was the ball in flight
1. what is the minimum necessary power output rating of the water pump in watts?2. what is the minimum necessary power
A 89.0 kg skydiver hanging from a parachute bounces up and down with a period of 1.50 s. What is the new period of oscillation when a second skydiver
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