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Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +5700 m/s, while rocket B has an initial velocity of +8100 m/s. After a timetboth rockets are again side by side, the displacement of each being zero. The acceleration of rocket A is -10 m/s2. What is the acceleration of rocket B?
A 1.50 kg mass is hung from a vertical spring with k=30.0 N/M, what is the magnitude and direction of the tensile force acting on the spring
A pipe that is closed on one end is 1.2 meters long. What are its fundamental frequency and its first two overtones? You punch out the closed end of the pipe. What are its new first and second harmonic frequencies?
The stoplight had just changed and a 1800 kg. Cadillac had entered the intersection, heading north at 2.4 m/s , How fast was the Volkswagen going just before the impact
A weightlifter has been given a barbell to lift. One end has a mass of 5.05 kg while the other end has a mass of 5.20 kg. The bar is 0.20 m long. (Consider the bar to be massless, and assume that the masses are thin disks, so that their centers of ma..
The intensity of an earthquake wave passing through the Earth is measured to be 1.5×106J/m^2\cdot s at a distance of 55km from the source. What was its intensity when it passed a point only 1.0km from the source?
The magnetic field between the poles of an electromagnet is 2.17 T. A coil of wire is placed in this region so that the field is parallel to the axis of the coil. How many turns are there in the coil
The voltage drop along a 30.0m segment of a power line made from copper wire (a very good conductor) is 1.2V, while carrying a current of 25.0 A. How large is the electric field along the wire
The power output of he Sun is 3.9 x 10^26 watts. Determine the intensity of the Sun's radiation on he planet Earth
A rocket of total mass M and with burnout mass 0.20 M attains a speed of 3 200 m/s after starting from rest in deep space. Evaluate the exhaust velocity of the rocket?
A 4.0-mm -diameter wire carries a 10A current when the electric field is 8.6×10?2V/m. What is the wire's resistivity
A ball is thrown straight upward. At 5.50 m above its launch point, the ball's speed is one-half its launch speed. What maximum height above its launch point does the ball attain?
point a is at position 4j -3kcm. point b is at position -3cm k. point c is at position 3i -2j 5k cm. point d is at
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