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A 1500 kg mass is lowered 200 m and as it is lowered it runs a generator which lights a 100 watt light bulb. Assuming perfect efficiency of this process, how long does the light bulb stay lit?
A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s and accidentally drops a bomb, How far does it travel horizontally while falling
A cylindrical grain bin 24.0 ft in diameter is filled with corn whose weight density is 45.1 lb/ft^3. How tall can the bin be for the floor
I hold a flat mirror 24.6 cm in front of my face. There is a freckle on my face 1 mm in diameter. Find the angular size of the freckle on the image of my face as viewed by my eye
Tilted Land is flat, much like Western Utah, but in Tilted Land gravity does not point straight down! Where does the ball hit the ground
A 8.51 -m ladder with a mass of 21.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 245 N. What is the net torque acting on the ladder
Two waves are generated on a string of length 3.0 m to produce a three-loop standing wave with an amplitude of 4.6 cm, What are the lowest frequency
In 1939 or 1940, Emanuel Zacchini took his human-cannonball act to an extreme: After being shot from a cannon, he soared over three Ferris wheels and into a net, If he reached maximum height over the middle wheel, by how much did he clear it
Consider a string of length 1.0 meter, fixed at both ends, with mass 100 grams and tension 100 Newtons. Give the number of nodes and antinodes set up on the string if it is driven at a frequency of 95 hertz. Be sure to include the ends of the string ..
Three charged particles are fixed to an x axis: Particle 1 of charge q1 = 2.1e-8 C is at position x=20 cm and particle 2 of charge q2 = 2.00q1 is at position x = 30 cm, particle 3 of charge q3 = -4.00q1 is at position x = 70 cm.
A 2cm x 2cm square loop of wire in the xy plane with resistance .010 ohms has one edge parallel to a long straight wire. What is the current in the loop
The "power cube" transformer for a portable CD player has an output of 4.5 V and 550 mA (both rms) when plugged into a 120 V/60 Hz outlet. What is the peak current in the primary coil
A constant force applied to object A causes it to accelerate at 6 m/s^2 .The same force applied to object B causes an acceleration of 3 m/s^2. Which object has the smallest mass
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