Physics

how large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 150 m m at a speed of 121 km/h k m / h ?
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a 7.0 kg bowling ball moves at 2.20 m/s. how fast must a 2.2 g ping pong ball move so that the two balls have the same kinetic energy
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State each of Newton's Laws of Motion and explain how each can be observed during the flight of a space craft, from liftoff until the craft enters space.
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when a liquid is flowing through a pipe, frictional forces between the liquid and the wall of the pipe convert kinetic energy into thermal energy. what effect does this have on the pressure of the liquid within the pipe
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just as the rock reaches point b , what is the normal force on it due to the bottom of the bowl? express your answer using two significant figures.
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a 7.6 nc point charge and a - 2.6 nc point charge are 3.1 cm apart. what is the electric field strength at the midpoint between the two charges?
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compare violet and red light from the visible spectrum. you are currently in a labeling module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. which has the longer wavelength? which has the greater frequency? which has the greater energy? answer bank
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if the total resistance of two motor windings connected in parallel is 20 ohms and 240v is applied to the circuit, how much current will flow?
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a pendulum is measured to swing back and forth 15 times in 10 seconds. what is the length of the string?
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a track star runs a 400-m race on a 400-m circular track in 45 s. what is his angular velocity assuming a constant speed?
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What is the electric potential energy of the group of charges in the figure? (Figure 1)
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Which material would you choose to make the handrails of the playhouse? Use the data to explain your reasoning.
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Some students want to demonstrate thermal expansion. They divide the following method: A large black balloon is taken to a shady area and filled with cool air. The balloon is then taken to a bright, sunny location. After a short time, the balloon begins to expand.What explanation does this investigation verify?A. A balloon filled with cool air will rise into the atmosphereB. As particles gain energy the material takes up more space.C. The air inside the balloon lost energy.D. The sunlight caused the air in the balloon to contract.
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if we say that the potential at the earth's surface is 0 v , what is the potential 1.6 km above the surface?
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a box with a mass of 50 kg is accelerating to the right because of an applied force of 250 n friction between the box and the surface below is negligible. what is the acceleration? (in meters/sec2)
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A machine is said to have low efficiency if it experiences a lot of energy loss to heat. How can a machine be made more efficient?by increasing gravityby increasing electrical energyby reducing magnetic energyby reducing friction
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a driver, traveling at 22 m/s, slows down her 2000 kg truck to stop for a red light. what work is done on the truck by the friction force of the road?
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a solid ball has a radius of 0.110 m and a mass of 1.88 kg how much force must be applied to the edge to give it an angular acceleration of 3.09
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a 13 pf capacitor is connected across a 54 v source. what charge is stored on it? answer in units of c.
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(a) The magnetic field inside an air filled solenoid 36cm long and 2cm in diameter is 0.8T. Approximately how much energy is stored in this field? (answer 29J)(b) Assuming the earth's magnetic field averages about 0.5 x 10-4 T near the surface of the earth, estimate the total enery stored in this field in the first 10km above the earth's surface. (answer 5.1 x 10+15 J)I needs help as to HOW to do this problem, as I already have the correct answers. Pleas explain CLEARLY how to solve this problem in order to come to these answers.
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Before a collision, a 200-kg Honda is driving 30 m/s towards a600-kg Toyota that is not moving. After the crash, the two carsare stuck together. What is their velocity?m/s
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suppose that the electric potential outside a living cell is higher than that inside the cell by 0.0813 v. how much work is done by the electric force when a sodium ion (charge
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a car starts from rest and moves around a circular track of radius 47.0 m. its speed increases at the constant rate of 0.600 m/s2. (a) what is the magnitude of its net linear acceleration 15.0 s later?
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A soccer player kicks a ball of mass 0.500 kg toward the goal.The ball hits the crossbar at a height of 2.6 m with a speed of 15.0m/s. Suppose the ball was at rest on the ground before it was kicked. Use g = 9.80 m/s.
1 Answer