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A high-energy pulsed laser emits a 1.5-ns-longpulse of average power 1.8×1011W . The beam is nearly a cylinder 2.5×10?3m in radius and it travels in free space.
Part A Determine the energy delivered in each pulse.Part B Determine the rms value of the electric field.
Three resistors, 23, 45, and 73 ?, are connected in series, and a 0.55-A current passes through them. (a) What is the equivalent resistance? (b) What is the potential difference across the three resistors?
A satellite moves in a circular orbit around the Earth at a speed of 5680 m/s. Determine the period of the satellite's orbit
Billy is running on level ground with a speed of 3.5 m/s. He attempts to jump a ditch that is 1.5 meters wide. if the horizontal component of his velocity does not chance.
Two positive charges, one of magntude Q and the other of magnitude 2Q, and one negative charge of magnitude -Q are placed on a straight line, Find both the magnitude and direction of the net force on the positive charge on the left
An inquisitive physics student and mountain climber climbs a 55 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 0.8 s apart and observes that they cause a single splash.
The ball is caught 55.3841m from the thrower. The acceleration due to gravity is 9.81m/s square. Explain how long is it in the air?
If she were to use the mattress as a trampoline losing contact with it for part of each cycle. What minimum amplitude of oscillation does she need.
An object has a kinetic energy of 257J and a momentum of magnitude 21.8 kg·m/s. Find out the speed and the mass of the object.
An athlete executing a long jump leaves the ground at a 35° angle and lands 7.30 m away.
Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-six times that of satellite B
A weightlifter bench-presses a 170.0 kg barbell from his chest to a height equal the length of his arms 0.750 m. What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
the speed of light in a certain material is measured to be 2.2*10^8 m/s. what is the index of refraction of this material
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