A bullet strikes a uniform plank with a velocity of 400 m/s and comes out with half velocity. What would be the velocity if the plank were only half thick?

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Explain the consequences of this addiction to the brain tissue

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?