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(i) How fast must a particle travel relative to an observer for its total energy to be double its rest-mass energy?
(ii) If the particle is an electron, how much work (expressed in keV) is required to accelerate it from rest to 0.50c?
(iii) How much kinetic energy would it have at this speed?
(iv) What would be its momentum?
A 150 g baseball is pitched at 50 m/s and is hit straight back at the pitcher at a speed of 60 m/s. What is the magnitude of the average force on the ball
a 2.54kg block is pulled across a floor by a 15.64 n force. the coefficients of static and kinetic friction are 0.4 and
A pedestrian walking with constant speed is at 5 s at x1 = 13 m and at 11 s at x2 = 18m. What is his position at 7.5 s
A(n) 0.497 kg football is thrown with a speed of 19.5 m/s. A stationary receiver catches the ball and brings it to rest in 0.0269 s. What is the magnitude of the impulse de livered to the ball? What is the average force exerted on the receiver?
A high intensity desk lamp is rated at 45 W and 12 Volts. It contains a transformer in its base that converts 120 V household voltage to the needed level. What is the current in the primary when the lamp is on
q1. an important news announcement is trans- mitted by radio waves to people who are 122 km away sitting next to their
if you add 1 kg of stainless steel at 100 degrees celsius to 5 kg water at 20 degrees celsius, What is the specific heat of stainless steel
A toy train rolls around a horizontal 1.0-m-diameter track. The coefficient of rolling friction is 0.10. What is the magnitude of the train’s angular acceleration after it is released?
A car is speeding at a constant 25 m/s (56 mi/h) in a school zone. A police car starts from rest just as the speeding car passes by it and accelerates at a constant rate of 5.0 m/s2. How fast is the police car traveling when it catches up with the ..
If the Volume of the vessel is 20 then we know that the maximum amount of displaced fluid will be [v] units and when you place the vessel in the water there will be [u] units of fluid displaced, which will flow into the graduated cylinder.
Two parallel, vertical, plane mirrors, 31.9 cm apart, face each other. A light source at point P is 29.8 cm from the mirror on the left and 2.1 cm from the mirror on the right. Find the number of reflections of light rays for each of these images
A spring with a spring constant of 251.9 N/m is compressed by 0.230 m. What is the speed of the ball bearing right after it loses contact with the spring
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