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A light beam is incident on the interface among two media at an angle of qi =15° to the normal. The light is transmitted through the interface at an angle qt =12° to the normal. Decide the index of refraction of the second medium when the first is air.
A 65- kg child sits in a swing suspended with 3.4- m-long ropes. The swing is held aside so that the ropes make an angle of 60 o with the vertical
an 10-kg ball moving at 22 ms collides elastically and head-on with a second 6-kg ball moving in the opposite direction
Suppose that you want to find the equation for a line that passes through the two points (0,3) and (4,9). What is the slope of this line
Two point charges are separated by 10.0 cm and have charges of +2.00 uC, What is the electric field at a point midway between the two charges
as a particle moves from the origin to 1i 7j m it is acted upon by a force given by 2i 6j n. calculate the work done
Only a small part of an iceberg protrudes above the water, whilethe bulk lies below the surface. The density of ice is 917 kg/m^3and that of seawater is 1025 kg/m^3. Find the percentage of theiceberg’s volume that lies below the surface.
A parallel-plate capacitor with plate area3.5cm2 and air-gap separation 0.50?mm is connected to a 12-V battery, How much work was required to pull the plates to their new separation
A spring is attached to an overhead beam. If you put a mass of 17 0 g on it, and it proceeds to stretch a distance of 7 cm, What is the magnitude of the downward acceleration
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
A conveyer belt with an incline of 10 degrees, is designed to load gravel into the center of a truck bed located 9 feet away from the end of the belt, Determine the velocity of the belt
You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -16.30 eV. What is the energy of the first photon emitted
A starship voyages to a distant planet 10 ly away. The explorers stay 4.00yr , return at the same speed, What is the speed of the starship
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