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A ball is thrown upward from the edge of a building that is 100mtall. On its way back down, the ball just misses the building,falling to the ground below. The elapsed time between the throw andthe ball hitting the ground is 6.5 sec.A) The initial speed of the ballC) The maximum height reached by the ball, measured above the ground.
A man strides across a bed of embers. Assume the glowing charcoal is covered with a thin layer of ash 0.50 mm thick and is at a temperature of 650C. The thermal conductiviity of ash and charcoal is 1.5 W/ (mxK). (a) Estimate the heat transferred t..
A person walks up a stalled 14 m long escalator in 81 s. When standing on the same escalator, now moving, the person is up in 48 s. How much time would it take that person to walk up the moving escalator?
A uniform magnetic field points out of the page. The field fully penetrates a wire loop in the plane of the page. what is the averaged induced current
A real heat engine working between heat reservoirs at 987 K and 659 K produces 540 J of work per cycle for a heat input of 2400 J.
An ordinary glass is filled to the brim with 310.0mL of water at 100.0 ?C. how much water could be added to the glass
Kathy tests her new sports car by racing with Stan, an experienced racer. Both start from rest, Find the time at which Kathy overtakes Stan
You are on the tilt-a-whirl ride and it begins to spin. Model the ride as all the mass at a radius of 1.60 m. The mass of the ride with people is 230.0 kg. What is the moment of inertia of the ride
Estimate the magnitude of the electric field strength due to a proton in a hydrogen atom at a distance of 5.29E-11 m, the expected position of the electron in the atom
An excited state of a certain nucleus has a lifetime of 5 X10-18s. Find the mimimum possible uncertainty of it's energy
The energy gap in silicon is 1.1eV. The average electron effective mass is 0.31m, where m is free electron mass. Calculate the electron concentration in the conduction band of silicon at T=300K
Using the mass-luminosity relationship if a main sequence star has a luminosity of 3000 times the luminosity of the Sun, what is its mass in relation to the Sun?
an elastic collision occurs between a 300g cart moving at 2m/s to the right and a 500 g cart moving at 6m/s to the left, find the velocity of each cart after the collision
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