A 7.5 kg sled slides to the left across level ground. When we come into this problem, any pushing forces have stopped and the sled is slowing due to friction at a rate of 1.2 m/s2. Find the value of the coefficient of kinetic friction between the snow and the sled.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?