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A laser beam is directed from air (n = 1.0) into an unknown liquid. The angle of incidence is measured to be 60° and the angle of refraction is measured to be 45°. What is the index of refraction of the unknown liquid?
The outside mirror on the passenger side of a car is convex and has a focal length of -8.5 m. Find the image distance of the truck
In a head-on collision, a car stops in 0.29 {s} from the speed of 28 {m/s}. The driver has a mass of 78 {kg}, and is, fortunately, tightly strapped into his seat. what force is applied to driver during that fraction of a second.
a balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 1.6 kg. find the magnitude of the initial acceleration of the balloon
The weight of the block on the table is 484 N and that of the hanging block is 165 N. Ignore all frictional effects, and assuming the pulley to be massless. Find the acceleration of the two blocks
A vector has an x component of -23.0 units and a y component of 50.5 units. Find the magnitude and direction of the vector
What is the speed of the river current. What is the swimmer's speed relative to the shore.
A snowboarder of mass 73 kg slides down the trail shown in the figure below. The first part of the trail is a ramp that makes an angle of 29° with the horizontal, Find the work done by gravity on the snowboarder
A piston with a volume of 24 liters contains 3.0 moles of argon. It is heated from 20 degrees Celsius to 178 degrees Celsius, and the piston is allowed to expand during the heating process so that the pressure on the gas remains constant. How much he..
The spheres are brought into contact and then separated to a distance of 2.40 cm. Determine the magnitude of the force that each sphere now experiences, and state whether the force is attractive or repulsive.
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time tTO needed to take off
A doubly charged ion is accelerated to an energy of 27.0 keV by the electric field between two parallel conducting plates separated by 2.30 cm
Find the ground state energy of an electron confined to a 1 D box of length 0.1 nm. Show an energy level diagram showing the first 5 levels. Calculate the wavelengths of the photons corresponding to transitions between the third level and the ground ..
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