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Q. White light containing wavelengths from 400 nm to 750 nm falls on a grating with 7000 lines/cm. How wide is the first-order spectrum on a screen 2.10 m away?
Q. A grocery cart with a mass of 17 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Determine the work completed by each of the forces on the cart if the aisle is 17 m long.
What is velocity curve between two times
which the tortoise wins in a photo finish? suppose that, when moving, both animals move steadily at their respective maximum speeds.
An antitank weapon fires a 4kg rocket which acquires a speed of 50.0 m/s after travelling 90 cm down a launching tube. Assume the rocket was accelerated uniformly, what is the average force acted on it.
At what angle should the highway engineer bank. What is the magnitude of the acceleration.
A 220 block on a 52 long string swings in a circle on a horizontal, frictionless table at 95.What is the speed of the block? What is the speed of the block.
The longest recorded pass in an NFL game traveled 86 yards in the air from the quarterback to the receiver.Assuming that the pass was thrown at the optimal 45 angle, what was speed at which the ball left the quarterback's hand.
If the weight of a room full of water is so great, why don't the first floors of houses built over basements all collapse as flooded to the ceiling.
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What must be the tension in the wire if it is to take .80 seconds for a pulse to travel along the wire from one pole to the other.
Three equal point charges, each with charge 1.35 mu C, are located at the vertices of an equilateral triangle whose sides are of length 0.60m. What is an electric potential energy U of the system? (Take as zero the potential energy of the three ch..
A ranger in a national park is driving at 28.0 mi/h when a deer jumps into the road 225 ft ahead of the vehicle. After a reaction time t, the ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the most reaction time a..
Mars Rover When the Mars rover was deployed on the surface of Mars in July 1998, radio signals took about 14 {rm min} to travel from Earth to the rover. How far was Mars from Earth at that time.
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
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