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A laser emits 1.00 x10^20 photons/sec. The laser has a wavelength of 473 nm. What is the power output of the laser?
A 7.01- g bullet is moving at 563.00 m/s as it leaves the 0.58- m-long barrel of a rifle. What is the average force on the bullet as it moves down the barrel
A 0.145-kg baseball pitched horizontally at 27 m/s strikes a bat and is popped straight up to a height of 25 m. calculate the average force [exerted by the bat on the ball] during contact
Two cylindrical rods are identical, except that one has a thermal conductivity k1 and the other has a thermal conductivity k2. As the drawing shows.
A 1408.0 g mass is on a horizontal surface with ?k = 0.39, and is in contact with a massless spring with a force constant of 526.0 N/m which is compressed. Calculate the distance the spring was compressed
An artillery shell is fired with a minimal velocity of 470m/s at 50o above the horizontal. To clear an avalanche, it explodes on a mountain side 38 s after firing.
A 70.0 kg person balances a 1250 kg elephant which is standing on a circular lift of diameter 2.00 m. What is the diameter of the piston
A satellite orbits at a distance from the Earth's center of about 7.20 Earth radii, What distance (in meters) does the satellite travel in one day
What are the velocities of the two people after the snowball is exchanged? Disregard friction between skate and the ice.
what is the minimum acceleration necessary for the plane to take flight.
A whale swims due east for a distance of 1.5 km, turns around and goes due west for 5.7 km, and finally turns around again and heads 4.5 km due east. What is the total distance traveled by the whale
A football is kicked at an angle of 28.4 degrees above horizontal and with an initial speed of 27.9. The ball lands on a level field. Determine The range of the football
The drawing (not to scale) shows one alignment of the sun, earth, and moon. find the magnitude of the net gravitational force on the moon
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