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A laser produces a 6.50-mW beam of light, consisting of photons with a wavelength of 621.9 nm. (a) How many photons are emitted by the laser each second? Incorrect: Your answer is incorrect. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. photons/s (b) The laser beam strikes a black surface and is absorbed. What is the change in the momentum of each photon that is absorbed? kg · m/s (c) What force does the laser beam exert on the black surface?
two spaceships are traveling in the same direction. With respect to an inertial frame of reference spaceship A has a speed of 0.850c. Find the speed Vab of spaceship A relative to spaceship B
How much work is completed on the box by the applied force
A 2.5 kg stone is dropped from a height of 4m. What is its momentum on impact
How much work is done in stretching the spring. Find out the constant acceleration of the car.
A narrow beam of light containing red (660 nm) and blue (470 nm) wavelengths travels from air through a 1.60 cm thick flat piece of crown glass and back to air again. The beam strikes the glass at a 35.0° incident angle.
A skier of mass 65 kg skis straight down a 11° slope at constant velocity. Find the value of the normal force
An oil rig in the gulf is held at its designated drilling location by 3 tugboats. tugboat A oulls with 42000 N straight in the east direction. Tugboat B pulls at an angle of 50 degrees north of west. tugboat C pulls 25 degress west of south. draw ..
A 54.2 g block of copper whose temperature is 400 K is placed in an insulating box with a 120 g block of lead whose temperature is 200 K. What is the change in the entropy of the system
ocean waves with wavelength 1.2 m and period 1.5s are moving past a pier. a boy runs along the pier, how many wave crests pass the boy each second
A large tower clock like Big Ben, the Parliment Clock in London, has an hour hand 2.70 m long with a mass of 54.5 kg, Calculate the total rotational kinetic energy of the two hands
Runner A is initially 8.6 km west of a flagpole and is running with a constant velocity of 5.2 km/h due east. What will be the distance of the two runners from the flagpole
A stick is resting on a concrete step with 1/4 of its length hanging over the edge. what is the magnitude of the angular acceleration of the stick at the instant shown
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