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a boy hears an eco of his own voice from a distant hill after 1s. The speed of the sound is 340m/s. What is the distance of the hill from the boy?
An 84.4-mH inductor and a 6.27-µF capacitor are connected in series with a generator whose frequency is 361 Hz. Determine the rms voltage across the inductor
Suppose you slowly, and at constant speed, lift a book of mass of 1 kg from the floor to a shelf 2 m above the floor. What is the workd by you done on the book
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
A parachutist descending at a speed of 13.4 m/s loses a shoe at an altitude of 54.2 m. Illustrate what is the velocity of the shoe just before it hits the ground? The acceleration of gravity is 9.81 m/s2.
This is accomplished using two small rockets, each with 150-N thrust, that are mounted on the rim of the station.
Light with ? = 760 nm is diffracted by a single slit, and the first intensity minimum (the first dark fringe) occurs at ? =3°. What is the width of the slit
A fictional spaceship accelerates at a constant rate of 0.107 m/s2. What would be its final velocity
Consider a rectangular loop of wire 6.3 cm by 8.2 cm in a uniform magnetic field of magnitude 1.7 T. What is the average induced emf in the loop
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 62.4° above the horizontal. By how much does the rocket clear the top of the wall
Light from an argon laser strikes a diffraction grating that has 5 310 grooves per centimeter. calculate vthe wavelength of the laser light
At a certain instant a ball passes location m. In the next 4 seconds, the ball's average velocity is m/s. At the end of this 4 second time interval, what is the height y of the ball?
An x-ray photon frequency 3x10 HZ collides with an electron at rest and is scattered through 90 degrees. What is the kinetic energy of the scattered electron
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