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Sam pushes a 10.0-kg sack of bread flour on a frictionless horizontal surface with a constant horizontal force of 3.0 N starting from rest.
What is the kinetic energy of the sack after Sam has pushed it a distance of 25 cm?
(Answer in J)
What is the speed of the sack after Sam has pushed it a distance of 25 cm?
(Answer in m/s)
A cannon ball is fired from ground level with a speed of 60.0 m/s at an angle of 58 deg. above the horizontal. what is the speed of the cannon ball when it is directly above the wall
Block A has mass 1.20 kg and Block B has mass 2.9 kg. They are forced together, compressing spring S between them how much potential energy was stored in the compressed spring
A certain telescope has an objective of focal length 1580cm. If the Moon is used as an object, a 1.4 cm long image formed by objective corresponds to what distance, in miles, on the Moon? Suppose 3.8 multiplied by 108 m for the Earth-Moon distance..
The particles in the nucleus of an atom are approximately 1.00×10?15{\rm m} apart, while the electrons in an atom are about 1.00×10?10{\rm m} from the nucleus. How many pounds would the force be
Mass m1 moving at constant velocity v1 along the x axis collides with mass m2 initially at rest. Determine the final velocities of the two masses if their collision is perfectly inelastic. Derive using any applicable conservation laws
The length of a simple pendulum is 0.72 m, the pendulum bob has a mass of 295 g, and it is released at an angle of 12° to the vertical. What is the pendulum bob's speed when it passes through the lowest point of the swing
A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. How much work is done by the variable force that stretches the collagen
A 23 kg body is moving in the direction of the positive x axis with a speed of 292 m/s when, owing to an internal explosion, it breaks into three pieces.
Mass of electron = 9.11 x 10-31 kg, h = 6.626 x 10-34 J.s, c = 3 x 108 m/s; 1 eV = 1.6 x 10-19 J, Mass of a proton or neutron = 1836 x mass of electron, Mass of aluminum atom = 26.9 amu, 1amu = 1.66 x10-27 kg.
A Carnot engine operates between 230 °C and 120 °C, absorbing 6.30 multiplied by 104 J per cycle at the higher temperature. How much work per cycle is this engine capable of performing
A transformer has310turns in the primary coil and130in the secondary coil. By what factor does it change the current
A hydrogen atom in the ground state absorbs a 20 eV photon. What is the speed of the liberated electron
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