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A laser beam shines along the surface of a block of transparent material (see figure below). Half of the beam goes straight to a detector, while the other half travels through the block and then hits the detector. The time delay between the arrival of the two light beams at the detector is 6.25 ns. What is the index of refraction of this material?
You have a wire of length L = 1.9 m for making a square coil of a dc motor. The current in the coil is I = 1.6 A, Find the maximum torque exerted on the coil
A 7.5cm diameter circular loop of wire is in a 0.76T magnetic field. The loop is removed from the field in 0.21s, What is the average induced emf
Suppose the pulley had appreciable mass, such that its moment of inertia = 3kgm^2 but has no friction. Find the speed with which this bucket strikes the floor in this case.
A 0.600 kg ball falls directly down onto concrete, hitting it with a speed of 13.5 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
Calculate the force of gravity on a spacecraft 25600 km (4 earth radii) above the Earth's surface if its mass is 1500 kg
A solid sphere, hoop, and disk (all with same mass and radius) are rolled up an incline with (potentially) different initial speeds. They each reach the same height up the incline. Compare the initial speed that they each enter the incline and exp..
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 2.2 × 10-4m2, find the cross-sectional area of the water stream at a point 0.11 m below the faucet
Suppose current is flowing in a wire from right to left. Which way do the electrons in the wire move? If three identical bulbs are connected in series across a 12V battery, the voltage across each bulb will be?
A certain star exhibits a parallax angle of .016 arc seconds. What is the distance to the star in parsecs? If this star was located at a distance of 800 parsecs, what parallax angle would the star now exhibit?
A 7.80-g bullet moving at 650 m/s penetrates a tree trunk to a depth of 5.4 cm. Use work and energy considerations to find the average frictional force that stops the bullet
Find the transmission coefficient for a finite square well for a bound state(the energy is greater than zero) where the potential is described in the figure
The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth, What is the vertical component of the water's initial velocity
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