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A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle.
What is the average power of each laser pulse?-in W
What is the electric field strength of the laser light at the focus point?- in N/C
In a liquid with a density of 1500 kg/m^3, longitudinal waves with a frequency of 360 Hz are found to have a wavelength of 7.70 m. Calculate the bulk modulus of the liquid
A 25000 kg rocket ship accelerates upwards by reason of constant 1.25MH of thrust from its engine. A simple pendulum on the ship is observed to complete 100 full swings in 75 seconds. What is the length of string.
A car's starter motor draws 55 A from the car's battery when starting up. If the start-up time is 2.4 s, how many electrons pass a location in the circuit during that time
A lighted candle is placed 35 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens.
A ball is shot from the top of a building with an initial velocity of 20 m/s at an angle ? = 44° above the horizontal. If a nearby building is the same height and 55 m away, how far below the top of the building will the ball strike the nearby build..
An aluminum cup contains 225 g of water at 27°C. A 450 g sample of silver at a initial temperature of 85°C is placed in the water. Of 45 g copper stirrer is used to stir the mixture until it reaches its final equilibrium temperature of 32°C. What is ..
if your body has a density of 967 kg/m^3, What fration of you will be submerged when in salt water? the density of salt water is 1025 kg/m^3
A 100kg cannon at rest contains a 10kgcannonball. when fired, the cannonball leaves the cannon with avelocity of 90m/s. what is the magnitude of the recoil speed of the cannon
A car (mass = 1170 kg) is traveling at 42 m/s when it collides head-on with a sport utility vehicle (mass = 2330 kg) traveling in the opposite direction
a 890kg electric car uses a 270v battery pack. as the car accelerates from rest 450c flows from the battery. whats the
a 40.0 cm -diameter cylinder of helium gas is 50.0cm long and at 30.0 c. the pressure gauge reads 120 psi. how many
q1. a student stands several meters in front of a smooth reflecting wall holding a board on which a wire is fixed at
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