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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?
Determine the specific heat capacity of an unknown sample of metal.
A catcher catches a fastball going 95mi/hr and recoils 12cm while stopping the ball in 0.005s. (mass of the ball is 280g). find the average force the ball exerts on the hand & glove
The human eye can barely detect a star whose intensity at the earth's surface is 1.8 x 10-11 W/m2. How many photons per second enter the eye from the star
Suppose an astronomical telescope is being designed to have an angular magnification of 31.6. If the focal length of the objective lens being used is 98.0 cm, find the required focal length of the eyepiece and the distance between the two lenses f..
a child operating a radio-controlled model car on a dock accidentally steers it off the edge. the cars displacement 1.0
A 24.5 kg child is standing on the outer edge of a merry-go-round which has moment of inertia 989 kg*m2 and radius 2.40m. Find the angular velocity if the child moves to a final position
When a potential difference of 12 V is applied to a wire 6.7m long and 0.33mm in diameter the result is an electric current of 2.2A. What is the resistivity of the wire
an m 6.70-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 ms and shatters
A 2000 kg truck has put its front bumper against the rear bumper of a 2500 kg SUV to give it a push. obtain the force of the SUV's bumper on the truck's bumper
Determine the circumference of a path that follows a great arc at a latitude of 45 degrees around a spherical planet that has a radius R of 5000
A 2.7-kg copper block is given an initial speed of 2.5 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. If the block absorbs 85% of its initial kinetic energy as internal energy, compute its increase in tempera..
a circular loop of wire 14 cm in diameter is placed with its normal at an angle ? = 37° with the direction of a uniform magnetic field of magnitude B = 0.51 T, What is the emf induced in the loop
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