The cross sectional area of an optical fibre is 6.3 x 10^-6 m^2 The intensity of the light entering the optical fibre is 3.2 x 10^7 W/m^2 Calculate the power of the light entering the optical fibre

What is the total translational kinetic energy of the air in an empty room that has dimensions 9.00m*14.0m*5.00m if the air is treated as an ideal gas at 1.00 atm?

What is the difference between science and technology? thx

Lenses are often coated with magnesium fluoride (refractive index n = 1.38) to reduce reflections. How thick should the layer of magnesium fluoride be if reflections from the coating surface interfere destructively with those from the coating-glass

The owners want the speed at the bottom of the first hill doubled. How much higher must the first hill be built?

A bike rider (mass = 86.2 kg, with bike accelerates from rest to 3.15 m/s over 7.83 m, while exerting a 98.4 N forward force. How much force pushes back against her due to friction, etc.?

The path of a beam of light from the sun to your eye when you are wearing sunglasses

The element that is most abundant in earth is

What is true about coal as an energy source

A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop? A) 36 m B) 72 m C) 140 m D) 210 m

Which of the following best explains why an explosive charge in a cannon can cause a cannonball to fly out of the cannon with a high velocity? A. because chemical potential energy can convert to gravitational potential energy B.