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a lightning flash is seen in the sky and 8.2seconds later the boom of the thunder is heard . The temperature of the air is 12 degrees celcius. what is the speed of sound at that temperature? and how far away is the lightning strike?
What focal length does the lens need. Find out the electrostatic force exerted on one sphere by the other.
A car is traveling along a straight road at a velocity of +39.0 m/s when its engine cuts out. For the next ten seconds the car slows down, Find the velocity of the car at the end of the initial ten-second interval
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 23cm apart. What is the wavelength of the sound
A generator has a square coil consisting of 217 turns. The coil rotates at 104 rad/s in a 0.146-T magnetic field. What is the length of one side of the coil
An 18.0 g rifle bullet travelling 245 m/s buries itself in a 3.50 kg pendulum hanging on a 3.00 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
A 30-caliber rifle with a mass of 2.84 kg fires a 9.73- g bullet with a speed of 556 m/s with respect to the ground. What kinetic energy is released by the explosion of the gunpowder
The nucleus in an iron atom has a radius of about 4.0 X 10-15 m and contains 26 protons, What is the magnitude of the gravitational force between those same two protons
The depth of the Pacific Ocean in the Mariana Trench is 36,198 ft. What is the gauge pressure at this depth
A spacecraft moving away from Earth emits a 4346 Hz signal. What is the speed of the spacecraft relative to Earth
Two point charges are located as shown in the figure, with charge q1 = +3.5 C at x = ?3.0 m, y = 0, How much work must be done on the electron to move it to the origin
Bicyclists in the Tour de France reach speeds of 34.0 miles per hour (mi/h) on flat sections of the road. What is this speed in meters per second
A metal ball with a mass of 2.29·10-6 kg and a charge of +4.57 mC has a kinetic energy of 4.51·108 J. how close will it come to the plane before stopping
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