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The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have masses of 13 and 40 kg. If A and B are 6.0 and 1.5 m, respectively, above the ground, determine the speed of
(a) the lighter box and
(b) the heavier box when each reaches B.
(c) What is the ratio of the kinetic energy of the heavier box to that of the lighter box at B?
Consider a heat pump which is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 4.14. at what rate does it remove heat from the home
A professor's office door is 0.96m wide, 2.2mhigh, 4.0cm thick; has a mass of 26kg , and pivots on frictionless hinges. what is its angular acceleration immediately afterward
How much work is required to stretch the spring. A satellite is in a low circular orbit about the Eart.
A proton and an alpha particle after being accelerated through same potential difference enter a uniform magnetic field the direction of which is perpendicular to their velocities
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
An artillery shell is fired with the initial velocity of 300 m/s at 54.7° above the horizontal. To clear an avalanche, it explodes on the mountainside 55.0 s after firing. What is the x and y components of the shell where it explodes, relative to its..
Find out the magnitude of the impulse imparted to golf ball?
Suppose a 0.250-kg ball is thrown at 15.0m/s to a motionless person standing on the ice with outstretched arms. Calculate his final linear velocity
Charge is scattered uniformly throughout a long cylindrical shell of inner radius R and out radius 2R. At what radius is the electric field equal to one-half the value on the outer surface.
A point charge Qpt= 10nC is surrounded by an insulating material and stuffed inside a spgerical steel shell iwth inner radius R1=1cm and outer R0=2cm; What is the net charge of the steel shell
Two identical conducting spheres, fixed in place, attract each other with a force of 0.094 N when their center to center separation is 60.00 cm. What was the initial negative charge on one of the spheres
(a) Determine the distance of the final image relative to the converging lens. (b) What is the height of the final image (including the proper algebraic sign)?
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