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A rocket accelerates vertically up from ground level from rest at 30 m/s^2 for 30 s; then runs out of fuel. What is the rocket's final altitude? (Ignore air resistance) .
A light ray is incident on the outer surface of the lucite at an angle of 43.7° with the normal. Find the angle the transmitted ray makes with the normal
An object, with mass 10 kg and speed 11 m/s relative to an observer, explodes into two pieces, one 4 times as massive as the other; the explosion takes place in deep space. The less massive piece stops relative to the observer. How much kinetic energ..
A 69 kilogram person throws a 0.0440 kilogram snowball forward with a ground speed of 35.0 m/s. Obtain what are the velocities of the two people after the snowball is exchanged
a circular loop of wire 0.8 m in diameter is placed with its normal at an angle of 30deg to the direction of a uniform
The only two forces acting on a body have magnitudes of 20 Nand 36 N and directions that differ by40°. What is the mass of the body
An electron (mass m1 = 9.11 x 10-31 kg) and a proton (mass m2 = 1.67 x10-27 kg) attract each other via an electrical force. What is the ratio of the electron's speed to the proton's speed
an automobile weighing 3000 lb is put in motion on a level highway and then allowed to coast to rest. its speed is
A source of sound is located at the center of two concentric spheres, Determine the sound intensity at each of the three patches
A worker on scaffolding 65 ft above the ground needs to lift a 340 lb bucket of cement from ground to a point 30 feet above the ground by pulling on a rope weighing 5 lb/ft. How much work is required.
the tractor-trailer unit is moving down the incline with a speed of 6.8 mihr when the driver brakes the tractor to a
A speed boat is moving across the surface of a lake. At time t1 = 0 with the components of its velocity are vx = 25 m/s and vy = -10 m/s. At time t2 = 15 s the components are vx = 12 m/s and vy = -21 m/s. What are the magnitude and direction of the a..
A horizontal turntable is made from a uniform solid disk and is initially rotating with angular velocity of 7.5 rad/s about a fixed vertical axis through its center. What is the mass of the turntable
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