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A ball is thrown horizontally from the top of a building that is 15.67 m high with a speed of 23.47 m/s. Neglecting air resistance, at what angle with respect to the horizontal will the ball strike the ground?
A 17 kg girl slides down a playground slide that is 3.1 m high. When she reaches the bottom of the slide, her speed is 1.3 m/s. what is the coefficient of friction between the girl and the slide
A laser pulse has an energy of 25 J and a beam radius of 2 mm. The pulse duration is 6 ns and the energy density is constant within the pulse. What is the spatial length of the pulse
An FM radio station broadcasts at a frequency of 88.1 MHz. The power radiated from the antenna is 50 kW. How many photons per second does the antenna emit
A swift blow with the hand can break a pine board. As the hand hits the board, the kinetic energy of the hand is transformed into elastic potential energy of the bending board;
the electric potential immediately outside another charged conducting sphere is 200 v and 10.0 cm farther from the
The magnitude of each force is 271 N, the force on the right is applied at an angle 20? and the mass of the block is 13 kg. what is the magnitude of the resulting acceleration
A 0.029-kg bullet is fired vertically at 225 m/s into a 0.15-kg baseball that is initially at rest. How high does the combined bullet and baseball rise
question a proton charge 1.6 x 10-19 travels through a magnetic field of 1.78t with a velocity of 2.3 x 105 msec. what
In an emergency, you need to run a radio that uses 39.3 W of power when attached to a 16.0 V power supply, how many series resistors should you use
An airplane goes North with an average speed of 100m/s, What is the plane's velocity relative to the ground
A wooden cube of side 0.30 m has density of 700 kg/m^3 and floats partially submerged in seawater(density = 1025 kg/m^3). what is the total mass of the cube
A(n) 19_kg object floating in water has 0.24 of its volume above the surface of the water. What is the volume of the object
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