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A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force required to keep the car from sliding?
The pressure exerted by a phonograph needle on a record is surprisingly large. what pressure is exerted on the record in N/m2
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.370mm wide. What is the width of the central bright fringe?
Drag race tires in contact with an asphalt surface have an extremely high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimation the coefficient of static friction needed for a drag racer to cover 1.0 km..
A scaffold of mass 80.0kg and length 5.10 m is supported in a horizontal position by a vertical cable at each end.
What are the d irections of electric field
A wire of radius 1.5 mm carries a current of 2.8 A. The potential difference between points on the wire 20 m apart is 4.7V. determine the electric field in the wire
A miniature 200 g monkey skis 150 m down a 25 degree inline on a 400 g sled. Use energy methods to find the final speed of the monkey
An AC generator has 70 rectangular loops on its armature and total resistance of 9 ohms. Each loop is 12 cm long and 7 cm wide. what will be the maximum output voltage of this generator
q1. a tiger leaps horizontally from a 5.9 m high rock with the speed of 3.4 ms. how far from the base of the rock wills
A thin, hollow 60.0 g section of pipe of radius 15.0 cm starts rolling (from rest) down a 18.5° incline 5.40 m long. What will be its total kinetic energy at the base of the incline
A Carnot engine has 40 g of helium gas as its working substance. It operates between two reservoirs of temperatures T1 = 400°C and T2 = 60°C. find the work generated by this engine during one cycle
If John Glenn weighed 640N on Earth's surface, i) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice distance from the center of the Earth? ii) Why is it said that an astronaut is never truly weightless..
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