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A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.64c and the exploration vehicle approaching at a speed of 0.79c. What is the speed of the exploration vehicle relative to the spaceship?
If the gas in a container absorbs 293 J of heat, has 106 J of work completed on it and after that does 35 J of work, what is the enhancement in the internal energy of the gas.
A 380-N, uniform, 1.50 m bar is suspended horizontally by two vertical cables at each end. A small object of weight 520 N is placed distance 0.5 m from the cable A. What is the tension in cable A.
A toy car moves at a velocity of 65.00 m/s on a compass heading of 115degrees. What are the components, magnitude and direction of car.
The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Suppose that only static friction supplies the centripetal force, & find the radius r of the tyre.
An electron and a positron each of mass 9.1 x 10^-31 kg, are in the same general vicinity and have very small initial speeds
The magnitude of the vector is 45.0 units and points in the direction 386 counter clockwise from the positive x-axis. Calculate the x-component of this vector.
A 144-g cricket ball moving 28.0 m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. What is the cricket ball's speed after the collision
an inductor that has a resistance of 40 ohm is connected to an ideal battery of 224V. Calculate the inductorace
What is the effect of thermal insulation on cooling
A solenoid has a cross-sectional area of 2.20 10-4 m2, consists of 200 turns per meter, and carries a current of 0.56 A. Find the average current induced in the coil
An uncharged capacitor and a resistor are connected in series to a source of emf. If e m f = 9.00 V, C = 15.0 µF, and R = 100 ?, find the charge on the capacitor after one time constant
A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic, What are the speeds of the U.S. and the French subs
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