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Before opening her parachute, an 800-N skydiver reaches a terminal velocity of 120mph. At this point, what will her acceleration be?
A steel ball is fastened to a cord and is released from rest when the string is horizontal. At the bottom of its path theball strikes a steel block initially at rest on a frictionless surface as indicated. The collision is elastic.
a large solar panel on a spacecraft in earth orbit produce 1.0kw of power when the panel is turned toward the sun. what
The surface charge density on an infinite sheet is -2.0 x 10-6 coulomb. How far does the particle travel before reaching its truning point
A 48 kg bear slides, from rest, 9.7 m down a lodgepole pine tree, moving with a speed of 5.8 m/s just before hitting the ground. find the average frictional force that acts on the sliding bear
A 5000kg lunar lander is in orbit 30km above the surface of the moon. It needs to move out to a 500km-high orbit in order to link up with the mother ship that will take the astronauts home. How much work do the thrusters do?
in a television set the power needed to operate the picture tube is 95 w and is derived from the secondary coil of a
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam.
A horizontal wire carries a current I 1=80 A. A secondwire is suspended parallel to it. If the second wire carries 20 Aand has a mass per unit length of 0.2 g/m,
A molecule of lithium fluoride (LiF) permanent dipole moment. The molecule is placed in a uniform electric field of strength 10^4 N/C, What is the electric dipole moment of the LiF molecule
What is the magnitude of net force causing the acceleration.
q1. an ambulance travelling at 39 ms approaches a car heading in the same direction at a speed of 19 ms. the ambulance
The blackbody radiation emitted from a furnace peaks at a wavelength of 2.5 10-6 m (0.0000025 m). What is the temperature inside the furnace
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