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An object is suspended from the bottom end of a spring. With the object in air, the spring exerts upward force Wa= 30 nt. With the object immersed in water, the spring exerts upward force Ww= 20 nt. With the object immersed in Liquid X, the spring exerts upward force Wx= 24 nt.Find the density of Liquid X.
What is the minimum pressing force that must be used.
Two spherical drops of mercury each have a charge of 0.14nC and a potential of 310V at the surface. What is the potential at the surface of the new drop
a bowling ball with a mass of 5 kg and traveling with a velocity of 4 ms-1 collides with an aluminum ball of 4 kg
You push your physics book 1.70 m along a horizontal tabletop with a horizontal push of 2.60 N while the opposing force of friction 0.750 N. How much work does gravity do on the book
A 74- kg ice hockey player standing on a frictionless sheet of ice throws a 6.2- kg bowling ball horizontally with a speed of 3.9 m/s. what speed does the hockey player recoil
An engine with reservoir temperatures of 387 K and 725 K operates at half the efficiency of a Carnot engine. obtain how much net work does the engine do in a cycle
A box starts from rest and is pushed a distance d = 1.25 meters along a frictionless ramp by a horizontal force, Fa, in 9.75 seconds. find the acceleration of the box as it slides up the ramp
A 50.0 kg skier is at the top of a slope. At the initial point at the top is 25.0 m vertically above point at the bottom. find the change in Potential energy of the skier-Earth system as the skier goes from top to bottom
One long wire lies along an x axis and carries a current of 43 A in the positive x direction. What is the magnitude of the resulting magnetic field at the point (0, 0.90 m, 0)
A 3440-kg spacecraft is in a circular orbit a distance1850 km above the surface of Mars. How much work must thespacecraft engines perform to move the spacecraft to a circularorbit that is 4360 km above the surface?
an electron is accelerated through an electric potential of 267 v then enters a 37 gauss magnetic field in a direction
A man stands on the roof of a building of height 16.6 m and throws a rock with a velocity of magnitude 25.6 m/s at an angle of 32.5 degrees above the horizontal. find the maximum height above the roof reached by the rock
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