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A 1.80 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 15.3 m/s. The vertical component of Earth's magnetic field in this region is 40.0 µT directed downward. Calculate the induced emf between the ends of the wire and determine which end is positive.mV
A certain nuclear power plant has an electrical power output of 430 MW. The rate at which energy must be supplied to the plant is 1,510 MW. What is the thermal efficiency of the power plant
A car is moving with a velocity (3.0m/s)x + (1.0m/s)y and 3.0 seconds later its velocity is (6.0m/s)x - (3.0m/s)y.
A 2.60kg box that is several hundred meters above the surface of the earth is suspended from the end of a short vertical rope of negligible mass, At what value of t does the box return to its initial position
A certain solid-propellant model rocket engine releases a total of 6000 J of energy as it burns. what fraction of the chemical energy released by the engine
A 0.14 meter string clamped at both ends under a tension of 16 N has a fundamental frequency of 135 Hz. What is the mass density of the string
A plane, diving with constant speed at an angle of 49 ° with the vertical, releases a projectile at an altitude of 570 m. The projectile hits the ground 7.0 s after release.
A block weighing 50 N rests on a 37 deg incline. If the incline is frictionless what would be its acceleration down the incline
The water cooling system in a car engine that carries hot water from the engine block to the radiator is an example of cooling by: Transfer ? Conduction ? Convection or Radiation?
A point source of light is 200 cm below the surface of a body of water. Find out the diameter of the circle at the surface through which light emerges from the water.
A 2150 kg railroad flatcar, which can move with negligible friction, is motionless next to a platform. What is the speed of the flatcar if he then stands on it
A 49.5 kg boy jumps on a 4.95 kg pogo stick with spring constant 3650 N/m, Find the period of the boy's motion
The Pfund series results from emission/absorption of photons due to transitions of electrons in a hydrogen to/from the n = 5 energy level from/to higher energy levels
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