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A weightless spring of force constant 2.50 N/cm is 15.0 cm long when nothing is attached to it. It is now used to pull horizontally on a 12.5 kg box on a smooth horizontal floor. You observe that the box starts from rest and moves 96.0 cm during the first 1.60 s of its motion. How long is the spring during this motion?
Two electrons, both with speed 1.0x10^4 m/s, are shot into a uniform magnetic field. The first is shot from the origin out along the + x-axis, compute the magnitude and direction of the magnetic field
A force of magnitude 880.0N stretches a certain spring by 0.190m from its equilibrium position. What is the force constant of this spring? How much elastic potential energy is stored in the spring when it is stretched 0.400m from its equilibrium p..
A thunderstorm drops 6.0cm of rain on a city that covers an area of 33 km by 45 km. approximation the number of raindrops that fell during the storm. You could assume the diameter of a raindrop is 2 mm.
Large meteorites are hardly slowed by Earth's atmosphere. how long does it take to reach the ground
What is the gravitational energy of stone-Earth System
A football is kicked at ground level with a speed of 40 m/s at an angle of 32.0 degrees to the horizontal. How much later does it hit the ground
An observation satellite orbits the planet at a height of 1000 . What is the projectile's speed as it passes the satellite?
Consider a box in the back of a truck. If the truckaccelerates slowly the box moves with the truck without slipping. What forces act on the box to accelerate it? In what direction do those forces point, please show in a free body diagram?
Two circular plates of radius 5.22 cm possess a charge separation of 8.252 ?C. find the electric field between the two plates
A block of wood weighs 50.0 N whenweighed in air. A sinker is attached to the block, and the weightof the wood-sinker combination is 220N when the sinker alone is immersed in water. Find the density of the block
A woman stands on a scale in a moving elevator. Her mass is 53.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
Two charges are separated by some distance and the magnitude of the electric force between them is 224.6 Newtons. If the distance between the same two charges is tripled, what is the magnitude of the electric force on them now in Newtons?
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