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A test is fired stright up from rest with a net acceleration of20m/s2. after 4 seconds the motor turns off, but the rocket continues to coast upward. what maximum elevation does the rocketreach?
A hollow sphere is rolling along a horizontal floor at 5.00 when it comes to a 39.0 incline. How far up the incline does it roll before reversing direction
A piston-and-cylinder machine contains 0.5 kg of steam at 60 bar and 360 C. The steam expands adiabatically to 1.5 bar and 160 C.
A 67.00 kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between skis and snow is 0.19. What would be the magnitude of the acceleration.
Review Conceptual Example 7 as an aid in solving this problem. Aportable electric heater uses 14 A ofcurrent. The manufacturer recommends that an extension cordattached to the heater dissipate no more than 2.3 W of power per meter of cord length.
A soccer player kicks a ball, giving it an initial velocity of 17.2 m/s in the horizontal direction, How far down the field does the ball travel before landing
A spaceship travels past an observer at a speed of 0.6c. What time would the observer record for the same event
A hollow cylinder (hoop) is rolling on a horizontal surface atspeed v = 4.5 m/s when itreaches a 10° incline. How long will it be on the incline before it arrives back at the bottom
A dolphin emits ultrasound at 100 kHz} and uses the timing of reflections to determine the position of objects in the water
A laser beam is traveling through an unknown substance. When it encounters a boundary with air, the angle of reflection is 21.8°, What is the index of refraction of the substance
A ray of light traveling in air enters benzene contained in a rectangular tank whose walls are made of ice. The bottom of the tank is a mirror. What angle does the ray make with the horizontal (normal) when it reaches the side of the tank
Consider a Hydrogen atom with the electron in the n = 7 shell. (The magnitude of the ground state energy of the Hydrogen atom is 13.6 eV.) How many subshells are in this shell
A proton accelerates from rest in a uniform electric field of 628 N/C. At some later time, its speed is 1.10106 m/s. What is its kinetic energy at the later time
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