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Consider a roller coaster as it travels near the bottom of its track as sketched in the figure below. At this point, the normal force on the roller coaster is five times its weight. If the speed of the roller coaster is 12 m/s, what is the radius of curvature of the track?
When a high-power laser is used in the Earth's atmosphere, At this maximum intensity, what power can be delivered in a cylindrical beam of diameter 6.56 mm
q1. how much resistance must be inserted in mua circuit has l 12.6 mh and c 1.15the circuit to reduce the undamped
Calculate the angular velocity? of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m . You may assume that the proton is stationary and the centripetal force is supplied by Coulomb attraction.
A light ray with an incident angle of 38.5 degrees crosses from air to a solution and has an angle of refraction of 21.9 degrees. What is the speed of the ligth ray in the solution
A box of mass m, is released from rest and slides down a 3 m high frictionless chute. What is there common speed after the collision
two point charges each have a value of 30.0 mC, compute the electric field midway between the two charges
Energy Budget and Habitability
q1. a loudspeaker of mass 15.0 is suspended a distance of h 2.30 below the ceiling by two cables that make equal
Typical field strengths are a few femoteslas (1fT=10^-15T). An adult brain is about 140mm wide, A reasonable magnetic field is 4.35fT at the sensor. According to this model, what is the current in the brain?
show that the horizontal distance that the aircraft engine falls is 8400 m. If the airplane somehow continues to fly as if nothing had happened. where is the engine relative to the airplane at the moment the engine hits the ground?
An aircraft with a mass of 856 kg accelerates from 0 to 83 m/s in 9 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft
A dentist's drill accelerates from rest at 640rad/s2for 2.30s and then runs at constant angular velocity for 6.50s. Through how many total revolutions has the drill turned
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