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For the different values given for the radius of curvature and speed, rank the magnitude of the force of the roller-coaster track on the cart at the bottom of each dip.
What is the acceleration of two falling sky divers (mass 108.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?
518.0 without breaking, and cable B can support up to 410.0 . You want to place a small weight on this bar. What is the heaviest weight you can put on without breaking either cable?
The next day, another plane flies directly from A to airport B in a straight line. In what direction should the pilot travel in this direct flight? (Assume there is no wind during these flights.)
In a simplified roller bearing, the inner cylinder has a radius of 1.0 cm and is stationary. What is the angular speed of the small cylinders, which is between two inner and outer cylinders?
Boat A negotiates a curve whose radius is 352 m. Boat B negotiates a curve whose radius is 160 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A t
Bonnie and Clyde are sliding a 291 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 383 of force while Bonnie pulls forward on
A wire of mass 1 g and length 58 cm is stretched with a tension of 480 N. it si then placed near the open end of the tube shown in figure and stroked with a violin bow so that it oscilates at its f
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?