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A 1-m-tall barrel is closed on top except for a thin pipe extending 4.2m up from the top. When the barrel is filled with water up to the base of the pipe (1 m deep) the water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is added to fill the pipe to its top?
A spring (k =805N/m) is hanging from ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.47m/s2.
a 20 kg mass sits on an inclined plane with friction making an angle of 50 degrees with respect to the horizontal. calculate the frictional force required to keep the mass from sliding down the incline
What is direction of the velocity of the canoe
If the pump outlet is blocked and the handle pushed until internal length of the pump cylinder is 21, by how much does the air temperature rise? Suppose that no heat is lost.
How much time does the ball spend in the air. What is the longest "hole in one" that the golfer can make, if the ball does not roll when it hits green.
A yo-yo has a rotational inertia of 1140 g·cm2 and a mass of 81.3 g. Its axle radius is 3.27 mm, and its string is 106 cm long, translational kinetic energy, rotational kinetic energy
Suppose you have to move a heavy crate of weight 875 N by sliding it along a horizontal concrete floor. What is the magnitude Fp of the minimum force you need to exert on the crate to make it start sliding along the floor
An alpha particle of mass m = 6.68×10-27 kg, positive charge q = 2e, and initial kinetic energy K = 9.00 MeV is projected, how close to the center of the nucleus is the particle when it comes momentarily to rest
If the heat necessary to warm 545 g of water from a temperature of T1 = 25.0 °C to T2 = 81.0 °C, what would be the speed of water
The cockroach finds a bread crumb on the rim and, of course, stops. Illustrate what is the angular speed of the lazy Susan after the cockroach stops?
Consider a regular hexagon of side length, L=10cm. A charge, Q=2uc, is located at each vertex(there are 6). find the electostatic potential at the center of the hexagon
2 stationary positive point charges, charge 1 of magnitude 3.20nC and charge 2 of magnitude 1.60nC, What is the speed Vfinal of the electron when it is 10.0cm from charge 1
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