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Q1. A lightning bolt transfers 6.0 coulombs of charge from a cloud to the ground in 2.0 10-3 second. What is the average current during this event?
Q2. In a certain region of space, a force F(r) has an associated potential energy of the form U(r) = a r2- b r + c, where a, b, and c are positive constants. What are points, if any, where the force F(r) goes to zero?
Q3. A 1500 car travelling at 26 suddenly runs out of gas while approaching the valley that looks like an inverted hump. 12m at the left where the care runs out of gas and 19 m at the right were it is headed. What will be the car's speed as it coasts into the gas station on the other side of the valley?
A cylindrical container with a cross-sectional area of 66.2 holds a fluid of density 816 kg/m3, and bottom of the container the pressure is 118 kPa. What is the depth of fluid.
An arrow is shot off the top of a bridge of unknown height. The speed of the arrow at launch is known to be 30.0 m/s. How tall is the bridge
A rope and two masses are suspended from the ceiling of an elevator which is accelerating downward at 2.8 m/s^2. find the tension in the rope connecting the two masses
A 1500kg car starts from rest and drives around a flat 52-m-diameter circular track. at what time does the car begin to slide out of the circle
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
question1an unpolarized beam of light is sent into a stack of four polarizing sheets oriented so that the angle between
You are on an unknown planet orbiting an unknown star. When the 108 cm long camera is pointed at the star an image is formed that is 1 cm in diameter, what is the diameter of the star
Find out the effective coefficient of kinetic friction
How numerous forces act on the brick
A helium-neon laser of the type often found in physics laboratories has a beam power of 4.00 mW at a wavelength of 633 nm. Calculate the intensity of the focused beam
A 70 turn coil of radius 4.6 cm rotates in a uniform magnetic field having a magnitude of 0.45 T. find the magnitude of the maximum torque exerted on the coil
A drop of water on a countertop reflects light from a flower held 3.10 cm directly above it. What is the focal length of the water drop
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