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If the radius of the equipotential surface of a point charge is 23.0m and is at a potential of +1.30kV (compared to zero at infinity), what are the magnitude and sign of the point charge?
If the patch is 78 meters wide and the average force of air resistance on the skier is 179 newtons, explain how fast is she going after crossing the patch?
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What is the time needed to take off
A 82 person sits on a 3.5 chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 in diameter. Find the pressure exerted on the floor by each leg of the chair
A rocket has a total mass of 1.00 x 105Kg and a burnout mass of 1.00 x 104Kg, including engines, shell, and payload. What thrust does the engine develop at lift off
An electron and a positron each have a mass of 9.11 x 10-31 kg. They collide and both vanish, determine the energy of the electromagnetic radiation
After flying for 15 min in a wind blowing 42 km/h at an angle of 28° south of east, What is the speed of the airplane relative to the air
The Doppler effect using ultrasonic waves of frequency 2.27×10^6hz is used to monitor the heartbeat of a fetus. calculate the maximum velocity of the surface of the beating heart
A soccer ball with mass 0.242 kg is initially at rest and is kicked at an angle of 29.0° with respect to the horizontal. What is the impulse received by the soccer ball
A certain LCD projector contains a single thin lens. An object 31.7 mm high is to be projected so that its upright image ?lls a screen 2.8 m high. The object-to-screen distance is 1.33 m. Find the focal length of the projection lens. Answer in units ..
A 15 N block lifted straight upward by a hand applying a force of 15 N has an initial kinetic energy of 7 J. What is the block's final kinetic energy
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. What is the mass of the aluminum chunk
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. (a) What is the distance to the center of the object? (b) What is the magnitude of the charge?
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