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In a science fiction novel, a starship takes three days to travel between two distant space stations according to its own clocks. Instruments on one of the space stations indicate that the trip took four days. How fast did the starship travel, relative to the space station?
Speedboat A negotiates a curve whose radius is 150 m. Speedboat B negotiates a curve whose radius is 190 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
When a golfer tees off, the head of her golf club which has a mass of 280 g is traveling 58 m/s just before it strikes a 46-g golf ball at rest on a tee. determine the speed of the golf ball just after impact
Find the capacitance of a parallel plate capacitor having plates of area 1.00 m2 that are separated by 0.400 mm of Teflon
A 7.10-kg box is sliding across the horizontal floor of an elevator. Determine the kinetic frictional force that acts on the box
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. Sphere B carries a charge of -7q. Sphere C carries no net charge. Spheres A and B are touched together and then separated.
a proton moves in a circle with a speed of 280 m/s through a uniform magnetic field of 2t directed perpendicular to the circular path. compute the orbital radius of the proton
Block A has a mass of 2 kg and rests on a smooth table. What is the acceleration in m/s2 of the two blocks
(8c1p14) Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars, What is the mass of gasoline (? = 0.680 g/cm3) in a 94.6 L gasoline tank? (kg)
Consider a collection of 4 "Fermi" dice. That is, no two die may have the same face up. What is the average value of the sum of the dice
A parallel-plate capacitor has the volume between its plates filled with plastic with dielectric constant K. Use Gauss's law to calculate the magnitude of the electric field in the dielectric
A boy coasts down a hill on a sled, reaching a level surface at the bottom with the speed of 8.4 m/s. If the coefficient of friction between sled's runners and snow is 0.040.
A soccer ball with mass 0.446 kg is initially moving with speed 1.40 m/s. Over what distance must the player's foot be in contact with the ball to increase the ball's speed to 6.40 m/s
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