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calculate the wavelength of the radio wave
What is the wavelength of the 49,000-Hz radio wave used by "radio-controlled" clocks and wristwatches?
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the speed of a satellite in a geosynchronous orbit
A charge of -2.95 µC is fixed at the center of a compass, What are the magnitude and direction of the net electrostatic force acting on the charge at the center
What is the resistance of the wire in the blanket? Express your answer to two significant figures and include the appropriate units. How much current does the wire carry
If the charge on a parallel-plate capacitor is doubled
Infrared light of wavelength 2.5micrometers illuminates a 0.20-mm-diameter hole. What is the angle of the first dark fringe in radians
a calculate the absolute pressure at the bottom of a fresh-water lake at a depth of22.9m. assume the density of the
On a very muddy football field, a 117 kilogram linebacker tackles an 86 kilogram half back. Find what is the velocity at which the two players move together immediately after the collision
A light plane attains an airspeed of 370 km/h. The pilot sets out for a destination 800 km to the north but discovers that the plane must be headed 10° east of north to fly there directly. What was the j-component of the wind velocity vector
You operate a small grain elevator near Champaign, Illinois. One of your silos uses a bucket elevator that carries a full load of 800 kg through a vertical distance of 39 m. (A bucket elevator works with a continuous belt, like a conveyor belt.)
The two identical pucks with masses of 300.0 g, in the figure rotate together on a frictionless, horizontal table. What is the tension in the second string
A 9.14-m ladder with a mass of 24.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 254 N. What is the net torque acting on the ladder
You throw a ball from the top of a 50 m high building at 12 m/s upward. The ball misses the building on the way down. The mass of the ball is 2 kg. What is the total work done by the force of gravity on the ball
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