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A bottle rocket can shoot its projectile vertically to a height of 23.0 . (You can ignore air resistance.) At what angle should the bottle rocket be fired to reach its maximum horizontal range? What is that range? Express your answer with the appropriate units.
A rocket accelerates upwards from rest at 20 m/for 4 seconds then its engine shuts off. find the maximum height reached by the rocket
A mountain climber looks up a slope and sees an avalanche ofboulders accelerating toward her. The boulders are initially60.0m above, moving at an initial speed of 2.00m/s and acceleratingat 4.00m/s^2.
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. At what speed must the chamber move so that an astronaut is subjected to 2.48 times the acceleration due to gravity
A 130kg mail bag hangs by a vertical rope 3.6mlong. A postal worker then displaces the bag to a position 2.2m sideways from its original position, What horizontal force is necessary to hold the bag in the new position
q1. a fan at a rock concert is 30 m from the stage where sound intensity level is 110 db. her eardrums have the
What is the net force on an object with a force of 0.99N at a 25 degree angle, force of 1.03N at a 195 degree angle
an arrow is shot at an angle of theta45 degrees above the horizontal. the arrow hits a tree a horizontal distance d220m
A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.23 × 102 kW. If the intensity of the sound at a distance of 40.3 m from the engine is 15.8 W/m^2 calculate the corresponding sound intensity level in dB
A solid spherical ball of mass 1.27 kg and radius 0.12 m rolls along a smooth, level surface with a speed of 2 m/s. How far up the plane does the ball go
At a stop light, a truck of mass, mT = 1.10 x 10^4 kg, fails to hit its brakes until it has hit a car of mass,mC = 1.60 x 10^3 kg. Determine the velocity of the combined truck and car immediately after the collision
An electron and a positron have masses of 9.11 10-31 kg. They collide and both vanish, with only electromagnetic radiation appearing after the collision. determine the energy of the electromagnetic radiation
the plank cde has a weight of 30 lb and rests on a small pivot at d. the ll5-lb gymnast a is standing on the plank at c
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