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Space Shuttle Discovery is in orbit, circling the Earth every 95 minutes. The mission requires docking with the International Space Station. Upon approach, the shuttle crew realizes that the space station is at an orbit that is 400m further out into space than their current cruising altitude. What change in speed will the shuttle experience in order to re-adjust the cruising altitude to dock with the space station?
An 8.0 m, 100 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.40, what is the minimum angle that ladder can make with the floor before it slips.
a how many fringes appear between the first diffraction-envelope minima to either side of the central maximum for a
A wire of initial length Lo and radius ro has measured resistance of 1.0 ?. The wire is drawn under tensile stress to a new uniform radius of r = 0.25ro. What is the new resistance of the wire
At what stage in its life does a star pass through the protostarphase? The Jeans instability occurs when. What is a protostar? How is a star's lifetime related to its mass?
The figure is taken from a paper (Am J Sports Med 2004 32: 477) on injuries to the anterior cruciate ligament due to forces applied by the patella tendon. What is the horizontal force on the patella tendon
A uniform plank of length 4.9m and weight 228N rests horizontally on two supports, with 1.10m of the plank hanging over the right support. To what distance x can a person who weighs 449N walk on overhanging part of the plank before it just begins ..
a wire has a diameter fo .200mm and stretches .20% when a force of 6.28N is applied to it. what is the elastic (Young's) modulu of this wire
The cable of the 1300 kg elevator cab in the figure snaps when the cab is at rest at the first floor, Find the speed of the cab just before it hits the spring
A 69.20-kg free runner jumps off a wall at a velocity of 6.95 m/s at an altitude of 2.37 m above the ground. What is the free runner's kinetic energy when he jumps off the wall
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
A cheerleader waves her pom-pom in SHM with an amplitude of 18.8 cm and a frequency of 0.870 hz. Find the maximum magnitude of the acceleration
A 2.60-N metal bar, 1.50 m long and having a resistance of 10.0 ohms, rests horizontally on conducting wires connecting it to the circuit, What is the acceleration of the bar just after the switch S is closed
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