The light ray makes an angle of alpha 32.1deg with the, Ask an Expert

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Q. The light ray makes an angle of α = 32.1° with the normal line at the boundary of linseed oil and water. Determine the angles θ1 and θ2. Note that n = 1.48 for linseed oil.

Q. A 25.0 kg projectile is fired by accelerating it with an electromagnetic rail gun on the Earth's surface. The rail makes a 30.0 degree angle with the horizontal, and the gun applies a 1250 N force on the projectile for a distance of 7.50 m along the rail. Ignoring air resistance and friction, what is the net work done on the projectile, by all the forces acting on it, as it moves 7.50 m along the rail?

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