Two workers are sliding 340 kg crate across the floor. one worker pushes forward on the crate with a force of 430 n while the other pulls in the same direction with a force of 270 n using a rope connected to the crate. both forces are horizontal, and the crate slides with a constant speed. what is the crate's coefficient of kinetic friction on the floor?

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?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

The solid that is formed and usually sinks to the bottom of a solution is the