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A man pushes a lawn mower on a level lawn with a force of 188 N. If 35% of this force is directed downward, how much work is done by the man in pushing the mower 6.6 m?
A parallel-plate capacitor in air has a plate separation of 1.39 cm and a plate area of 25.0 cm2. The plates are charged to a potential difference of 255 V and disconnected from the source. The cap
The disk causes the matter to gradually spiral into the black hole. What will change in terms of the observable properties of the black hole as this process continues.
Three identical train cars, coupled together, are rolling east at 1.2 m/s . A fourth car traveling east at 4.4 m/s catches up with the three and couples to make a four-car train. A moment later, th
x component Fx = - 6x N, where x is in meters. The velocity of the body at x = 3.0 m is 8.0 m/s. (a) What is the velocity of the body at x = 4.0 m?
Sam, whose mass is 72.0 kg, takes off down a 55.0 m high, 12.0^circ slope on his jet-powered skis. The skis have a thrust of 220 N. Sam's speed at the bottom is 38.0 {rm m/s}. What is the coefficie
Use the principle of conservation of mechanical energy to find the speed of the block at the base of the incline. (carry the answer to one decimal)
At how many revolutions per minute should it rotate in order to simulate Earth's gravity-that is, so that the normal force on an astronaut at the outer edge would be the astronaut's weight on Earth?
A backpack full of books weighing 52.0 N rests on a table in a physics laboratory classroom. A spring with a force constant of 150 N/m is attached to the backpack and pulled horizontally, as indica
What were the major discoveries obtained by the planetary missions of the sun?
Having vertical sides. If your barge goes up the Mississippi River, which is fresh water, how much extra mass can you carry without sinking?
If the temperature is increased to 320°C and the potential difference across the wire remains constant, what is the power delivered?
Oxytocin causes the smooth muscle to uterus to contract but why does it cause the smooth muscle of small intestine to contract?
The only force acting on the particle is the electric force. what point is at the higher potential? give your reasoning.
What is the role of Calcium ions in the excitation of nerve fibres?
(a) At this average price, calculate the cost of leaving a 140-W porch light on for two weeks while you are on vacation?
An enzyme that acts early in infection to synthesize a DNA genome off of an RNA template.
A car of mass = 1500 kg traveling at 40.0 km/hr enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. Use g = 9.80 m/
The block, with the bullet embedded, slides 5.0cm across the table. The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet?
If a drop is to be deflected a distance of 0.350 by the time it reaches the end of the deflection plate, what magnitude of charge must be given to the drop?
Two astronauts, each having a mass of 70.0 kg, are connected by a 11.0 m rope of negligible mass. They are isolated in space, orbiting their center of mass at speeds of 5.40 m/s.
An electron is moved from an initial location where the potential is Vi=30V to a final location of Vf=150V. what is the change in the electrons potential energy?
Suppose that when you ride on your 7.60-kg bike the weight of you and the bike is supported equally by the two tires. If the gauge pressure in the tires is 78.5 lb/in2 and the area of contact betwe