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At a particular moment in time and space, we measure an electromagnetic wave's electric and magnetic fields. We find the electric field Act E pointing Down and the magnetic field Act B pointing South. What is the direction of wave propagation?
A physics book slides off a horizontal tabletop with a speed of 2.30 m/s. It strikes the floor in 0.350 s. Find the height of the tabletop above the floor
A spring with a 3 kilogram mass attached hangs straight down from a hook like in your lab setup, so that it stretches 1 centimeters due to the weight of the mass. What is the spring constant
A 130 cm length of string has a mass of 3.5 g. It is stretched with a tension of 5.9 N between fixed supports. (a) What is the wave speed for this string? (b) What is the lowest resonant frequency of this string?
A football kicker can give the ball an initial speed of 24 m/s. He is 45 m from the goalpost which has a crossbar 2.69 m high. What is the smallest angle of elevation
A human hair is placed directly in front of the opening of a laser pointer. The light has a wavelength of 647.8 nm. Determine the approximate thickness of the hair
In a continuous printing process paper is drawn into the presses at a constant speed v Denoting by r the radius of the paper roll at any given time and by b the thickness of the paper, derive an expression for the angular acceleration of the paper..
Two ice skaters, with masses of 50.0kg and 65.0kg , are at the center of a 40.0m -diameter circular rink. If the heavier skater reaches the edge in 30.0s , how long does the lighter skater take to reach the edge?
An airplane with a speed of 87.7 m/s is climbing upward at an angle of 35.1 ° with respect to the horizontal. When the plane's altitude is 533 m, the pilot releases a package.
The temperature of a fixed mass of gas drops from 127 degree C to 27C under constant pressure. Find ratio of the new volume to the original volume
Light from a 554-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 22 °
An electron has a speed of v = 0.953c. What is its total energy (rest plus kinetic energy)
Five children are pushing on a snowball. Each is pushing with a force of 10.0 N. Each is pushing at an angle of 45° relative to his neighbor. What is the net push on the ball
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