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A pickup truck is moving at 25 m/s when suddenly the brakes are applied and the truck comes to a stop in 4.7 s. A tool box of mass m rests on the bed of the truck 2.5 m from the cab. If the coefficient of kinetic friction between the tool box and the bed of the truck is 0.28, how much time elapses before the tool box strikes the cab?
A high-energy pulsed laser emits a 1.2-ns-longpulse of average power 1.7×1011W. Determine the rms value of the electric field
In an EM wave the electric field oscillates 4 X 10^14 HZ at in the North - South direction. In what direction is the magnetic field oscillating
A child goes down a playground slide with an acceleration of 1.40. Find out the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 31.0 below the horizontal.
By measuring the spectrum of wavelengths of light from our sun, we know that its surface temperature is 5760 K. Use this information to calculate the diameter of our sun
What is the result of mixing 80g of ice at -20 degrees Celsius, into a 200g of water at 20 degrees Celsius? What fraction of the ice cube melts
a bee that is 3m away from a person produces a buzzing sound that is barely audible (the intensity is the threshold of hearing I0) What is the decible level of 1000 bees
A certain loudspeaker (assumed to be a point source ) emits 30.0 W of sound power. Calculate the power intercepted by the microphone
Unexpectedly, is about the similar for the muscles of all animals and has the numerical value of in SI units.
A lottery machine uses blowing air to keep 2000 Ping-Pong balls bouncing around inside a 1.0m X 1.0m X1.0m box. What is the mean free path between collisions
A catapult on a cliff launches a large round rock towards a ship on the ocean below. calculate the speed at which the rock is launched
In a period of 1.4 s, 5.0 1023 nitrogen molecules strike a wall of area 8.9 cm2. find the pressure exerted on the wall
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable below the worker
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