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The refractive index of a transparent material can be determined by measuring the critical angle when the solid is in air. If ?c= 42.0° what is the index of refraction of the material? A light ray strikes this material (from air) at an angle of 33.3° with respect to the normal of the surface. Calculate the angle of the reflected ray (in degrees). Calculate the angle of the refracted ray (in degrees). Assume now that the light ray exits the material. It strikes the material-air boundary at an angle of 33.3° with respect to the normal. What is the angle of the refracted ray?
A pail of water is rotated in a vertical circle of radius 1.20 m. What is the minimum speed of the pail at the top of the circle if no water is to spill out
A 25g bullet pierces a sand bag 27cm thick. If the initial bullet velocity was 64 m/s and it emerged from the sandbag with 35m/s, what is the magnitude of the friction force
A loop of 25 turns of wire and radius 15 cm is placed perpendicular to a magnetic field of .4T. what is the average EMF produced across the soil
A 25 N force at 60° is required to set a crate into motion on a floor. What is the value of the static friction
Suppose the block is released from rest with the spring compressed 5.50cm. What is the speed of the block after it leaves the spring
One kilogram of dry air is warmed from 20ºC to 70ºC under a constant pressure of 1atm. Calculate the change in internal energy
A spring is hung from the ceiling. A 0.400-kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
A mass-spring system completes 7 full oscillations in a time of 14.4 seconds. What is the angular frequency of oscillation
The ammonia molecule NH3 has a permanent electric dipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 x 10-30 C-m. find the electric potential in volts due to an ammonia molecule
How much must this spring be stretched to store.
A 27.78 cm diameter cylinder that is 39.07 cm long containes 59.46 g of oxigen gas at 22°C. How many moles of oxigen are in the cylinder
The last piece has 4 times as much mass as each of the other pieces. Illustrate what is the magnitude of the velocity of the last piece?
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