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A student is helping a teacher unload boxes off a truck at a school. A 6.24 kg box is sliding down the ramp at an angle of 36.1°. The ramp exerts a force of kinetic friction of 7.31N on the box. Calculate the acceleration of the box.
A 5 m length of wire carrying a current of 5 A lies on a horizontal table with a rectangular top of dimensions 0.300 m × 0.400 m. What magnetic force acts on this segment of wire
The effects of the spin of the earth
A pulley 18 in diameter is free to rotate about the horizontal axle. A 220 mass and a 420 mass are tied to either end of a massless string, and string is hung over the pulley.
If so how fast will the cars be traveling when they collided? If they did not, what is a distance between the cars at this point.
From the difference in mass of a hydrogen atom (Appendix B) to the mass of a proton and an electron (Table 1.5), estimate the binding energy of the electron in the hydrogen atom. Compare this to the ionization energy of the ground state electron a..
A 3.6 meter long steel wire has a cross-section area of 0.047 cm2. Obtain the maximum weight that the wire can support
Consider a 4.7mm-diameter wire made from copper (mass density of 8.9 g/cc). THe wire is carrying a current of 8milliamp. What is the average drift speed
Calculate the speed of sound for a wave whose wavelength is 2.5 m and whose frequency is 270 Hz
question1suppose about the demonstration by mcwilliams with the rope and shoe.a. draw a simple figure viewing the
5.0kg of water at 32?C is mixed with 5.0kg of water at 52?C in a well-insulated container. Estimate the net change in entropy of the system
The planet Neptune orbits our Sun at an average distance of 4.50 * 10^9 km.It's mass is 1.02 8 10^26 kg. The Sun's mass is 1.99 * 10^30 kg. What is the strength of the gravitational field at the "surface"of Neptune
A 81.0kN spaceship comes in for a vertical landing. From an initial speed of 1.00 km/s, What braking force must its rockets provide
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