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Two spheres with uniform surface charge density, first with a radius of 7.1 cm and the second with a radius of 4.8 cm , are separated by a center-to-center distance of 33 cm. The spheres have a combined charge of +55μC and repel one another with a force of 0.62 N . Assume q1>q2.
What is the surface charge density on the first sphere?
What is the surface charge density on the second sphere?
Astronaut Ann wishes to travel from one side of her spaceship to the other side so she pushes herself away from a wall, What is Ann's speed relative to Bob as she drifts across the spacehip
Determine the wave's amplitude. Determine the wave's wavelength.Determine the wave's frequency.Determine the wave's speed of propagation. Determine the wave's direction of propagation.
A short train (an engine plus four cars) is accelerating at 1.40 m/s^2 . The mass of each car is 3.70×104 kg, and each car has negligible frictional forces acting on it. What is the force of the engine on the first car
consider a model rocket that is lunched in a vertical direction. Nelected air resistance and changes in its mass , m. determine the mamimum alttiude
The pickup coil in an electric guitar contains 10,000 turnsand has a diameter of 2.1 mm. When thepickup coil is very close to a guitar string, there is a field ofmagnitude B = 0.09 T in thecoil. If this steel string is vibrating at a frequency of2..
WThe vertical displacement of particles in a string (when a wave is propagating through it) is given by y = (0.02) sin[(10?)t %u2013 (8?)x]
The front 1.20 m of a 1,250-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. What is the magnitude of the average force on the car
calculate the buoyant force due to the surrounding air on a man weighing 800n . assume his average density is the same
A bucket filled with water has a mass of 64.9 kg and is attached to a rope that is wound around a 0.4 m radius cylinder. Illustrate what torque does the bucket produce around the center of the cylinder?
A person in a boat sees a fish in the water of index 1.33 at an angle of 30relative to the water’s surface. What is the true angle relative to the water’s surface?
A group of hikers hears an echo 1.10 second after shouting. Find how far away is the mountain that reflected the sound wave
A 2.3 kg pendulum bob is pulled out such that its center of mass is 0.26 m above its lowest point and released. What is the gravitational potential energy of the pendulum
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