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1. A baseball fan sitting the “cheap seats” is 255m from home plate. How much time elapses among the instant the fan sees a batter hit the ball and the moment he hears the sound?
2. A camera is equipped by a lens with a focal length of 30cm.when an object 2 m (200cm) away is being photographed; how far from the field must the lens be placed? What is the magnification?
2.0 kg block is attached to a spring with spring constant 22 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 46 cm/s.
A polar explorer pulls a sled on dry snow (the coefficient of kinetic friction is 0.12 for sled on snow). The rope attached to the sled pulls at an angle of 9° above the horizontal and the explorer pulls with with 600 N of force. The sled has a to..
question a 75kg student is standing atop a spring in an elevator that is accelerating upward at 3.0ms2 the spring
the san vicente reservoir north of san diego currently has a residence time for water of approximately 14 days. the
question what is the force per meter on a straight wire carrying 5.0 s when it is placed in a magnetic field of .020 t?
a stiff straight horizontal wire of length 25 cm and mass 20g is supported by electrical contacts at its ends but is
at what speed must an object be moving in order that it haskinetic energy 1.50 times its rest energy
Two point particles of charge Q1 = 46 µC and Q2 = 81 µC are found to have a potential energy of 43 J. What is the distance between the charges
A charge = 5.00 is placed at the origin of an xy-coordinate system, and a charge = -3.00is placed on the positive axis at 4.00, Find the direction of this force
A long solenoid lying along the x-axis, as shown, has a 0.2 T field inside its coils. What is the magnitude of the magnetic force on the particle
question a 100g iron ball specific heat0.473 jgc is heated to 125c and is placed in a calorimeter holding 200g of water
An airplane needs to reach a velocity of 487 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
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