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A decorative light fixture in an elevator consists of a 2.0 kg light suspended by a cable from the ceiling of the elevator. from this light a separate cable suspends a second .80 kg light. The elevator is moving downward at 4.0m/s when someone presses the emergency stop button. During the stop the upper cable snaps. The elevator engineer says that the cable could withstand a force of 40 N without breaking.
You are sitting in a wagon and rolling horizontally at 5 m/s when your little sister jumps into your lap as you pass by. Calculate the speed of the wagon after your little sister jumps in
A boy standing on top of a building throws a small ball from a height of H1 = 24.2 m. calculate for how long the ball is in the air
The spectra you observe through the diffractiohn grating for these atomic vapor lamps are discrete lines of color. Recall what you observed for the spectral pattern for "white light" from a light bulb. Explain what is happening. ie. the difference..
X rays diffract from a crystal in which the spacing between atomic planes is .200nm. what is the angle of the first-order diffraction
Suppose you are 69 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 4.90mm.
If the entrance velocity into the pipe is 12.5 m/s, what is the rate of flow of the material (air) 'Rm'? What is the velocity 'Vf' when the air is ejected into the surroundings at 1 atm through a nozzle
Two charged spherical conductors are connected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05cm and the other a radius of 6.05cm.
A container is filled to a depth of 21.0 cm with water. What is the absolute pressure at the bottom of the container
A car starts from rest at a stop sign. It accelerates at 4.0 m/s2 for 9 seconds, coasts for 6 s, How far apart are the stop signs
A proton is initially at rest at a point where the potential is 507V. Sometime later the proton is at a point where the potential is 187V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy.
A Texas cockroach of mass 0.123 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has a radius 16.6 cm, What is the angular speed of the lazy Susan after the cockroach stops
The catapult on an aircraft carrier can take an aircraft from 0 to 209 mph (the launch speed) in 9 seconds, at which time the aircraft launches
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