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Compute the speed of the block at the instant the dielectric leaves the capacitor assuming it starts at rest and that the voltage across the capacitor after the dielectric is removed is measured to
As the swimmer apprached the Ontario shore, she encountered a cross current of 2m/s [E 25degrees S]. Calculate her velocity with respect to the crowd observing from the beach.
Which of the following is true regarding the kinds of events we uncover looking at the Milky Way using different wavelengths of light?
A flight attendant pulls her 64 N flight bag a distance of 287 m along a level airport floor at a constant velocity. The force she exerts is 35 N at an angle of 56° above the horizontal.
Which of the following statements about the spiral structure of spiral galaxies is false?
The Nichrome wire is l =6 cm long and has radius r=1 mm.3 Nichrome has 9 × 1028 mobile electrons/m and an electron mobility of 7 × 10^-5 (m/s)/(V/m). What is the magnitude of the electri
Which of the following comprise the oldest members of the Milky Way?
The spontaneous fission rate of 238U is 1 fission per gram per 1 00 sec. Show that this is equivalent to a half-life for fission of 5.5 x 1 015 years.
What kinds of objects lie in the halo of our galaxy?
If the contact time with the sidewalk is 1/800s, what is the magnitude of the average force exerted on the superball by the sidewalk?
What is the diameter of the disk of the Milky Way?
What is the torque exerted by the fish about an axis perpendicular to the page and passing through the hand of the person holding the pole?
A 0.160-{rm kg} baseball traveling 30.0 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 15.0 cm.What was the magnitude of the average force applied by the ball
A flight attendant pulls her 70 N flight bag a distance of 248 m along a level airport floor at a constant velocity. The force she exerts is 42 N at an angle of 58° above the horizontal.
A 20 kg block is stacked on top of the 20 kg block. Both blocks are glued together. What is the magnitude F of the force, acting horizontally on the two blocks, that is required to make the two bloc
They then both turn around the spindle with their centers superposed. What is the angular frequency in rev/s of the combination?
A net torque of magnitude 500 Nm is exerted on the rotor of an electric generator for 29 s. What is the magnitude of the angular momentum of the rotor at the end of 29 s if it was initially at rest?
Certain car battery with a 12.0 V emf has an initial charge of 132 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how lo
A swimming pool has dimensions 24.0m x 13.0 m and a flat bottom. When the pool is filled to a depth of 1.50m with fresh water, what is the force caused by the water on the bottom?
what is the value of g and its uncertainty inferred from this data. I got the value of g as 2.11 m/s but i am having trouble figuring out the uncertainty.
The road is banked at an angle , and there is no friction between the road and the car's tires. Use = 9.80 throughout this problem. What is the radius of the turn if = 20.0.
Find the coefficient of kinetic friction between a 3.15 kg block and the horizontal surface on which it rests if a 82.0 N/m spring must be stretched by 5.90 cm to pull it with constant speed. Assum
A girl on a sled coasts down a hill. Her speed is 7.8 m/s when she reaches level ground at the bottom. The coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.047
The escape speed from a very small asteroid is only 26 m/s. If you throw a rock away from the asteroid at a speed of 38 m/s, what will be its final speed?
A 81 kg parachutist descends through a vertical height of 310 m with constant speed. Find the increase in entropy produced by the parachutist, assuming the air temperature is 21°C.