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An electron and a proton are each placed at rest in a uniform electric field of magnitude 564 N/C. Calculate the speed of each particle 44.4 ns after being released.
A movable piston having a mass of 7kg and a cross-sectional area of 6 cm2 traps 0.2 mol of an ideal gas in a vertical cylinder. The piston slides without friction in the cylinder. The outside of the cylinder is kept at atmospheric pressure, 1.013×..
A bat flying in a cave emits a sound and receives its echo 0.37s later. How far away is the cave wall? (Hint: The sound has to travel to the wall and then back again. Use 340 m/s for the speed of sound.)
You have just built a house out in the country and it comes to your attention that you need to install a lightning rod. Being naturally curious you ask a hardware salesperson how lightning rods work and they accurately tell you.
In a popular amusement park ride, a rotating cylinder of radius 4.00 m is set in rotation at an angular velocity of 6.00 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position.
What is constant acceleration
What is the speed of the block while the spring is till now compressed by xf=0.14m.
What is the force of air resistance. how high was the jump.
A dentist uses a small mirror with a radius of 36 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 16 mm from the tooth, what is the magnification of an image.
A rock of mass 44 kg accidentally breaks loose from edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 252 N. What is the magnitude of the acceleration of the rock?
How long would it take you to cover the 83 length of the walkway if, once you get on the walkway, you at once turns around and start walking in the opposite direction with a speed of 1.7 relative to the walkway.
A car starts from rest and accelerates at a constant rate of 3.00 m/s^2 until it is moving at 18.0 m/s. The car then decreases its acceleration to 0.500 m/s^2 and continues moving for an additional 250 m. Find the total time taken.
Two point charges have a total charge of 515 µC. When placed 1.15 m apart, the force each exerts on the other is 24.4 N and is repulsive. What is the charge on each.
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