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A water pipe having a 2.9 cm inside diameter carries water into the basement of a house at a speed of 0.87 m/s and a pressure of 174 kPa. The pipe tapers to 2.0 cm and rises to the second floor 7.8 m above the input point.
(a) What is the speed at the second floor?
____ m/s
(b) What is the water pressure at the second floor?
____ kPa
A 1500-kg car moving east at 28.00m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
A 10.5 kg uniform board is wedged into a corner and held by a string at a 50 degree angle. Determine the tension in the string. Hint: take torques about the corner and assume any length for the board.
Determine the coefficient of kinetic friction between the block & the table.
A research submarine has a 40.0cm -diameter window 8.30cm thick. The manufacturer says the window can withstand forces up to 1.10×106N
A 1300 {rm N} crate slides 13 {rm m} down a ramp that makes the angle of 30^circ with the horizontal. If the crate slides at a constant speed, how much thermal energy is created.
An elevator releases 11200J of gravitational potential energy as descending 4m between floors. How much does elevator weigh.
Determine the coefficient of kinetic friction between the crate and surface.
A box with a mass of 8 kg is lifted (without acceleration) through a height of 9 m, in order to place it upon the shelf of the closet.
explain What is the magnitude of the electric field next to the sheet.
What are the velocities of the two people after the snowball is exchanged. What is the greatest kinetic energy of the electrons removed from the cathode by this light.
An RL circuit consists of a switch, an emf source Eo, a 4 kΩ resistor, and a 5 H inductor. If the potential across resistor is 16 V 5 ms after switch is closed, find out the source emf, Eo.
What will transform in terms of the observable properties of the black hole as this process continues
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