A wooden board is leaning against a wall. The base of the board is 6 feet from the base of the wall, and the base of the board forms a 55° angle with the ground. What is the length of the wooden board?Enter your answer, rounded to the nearest tenth, in the box.

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c. take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface, what is its volume?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

What is the increase in density of a medium due to wave travel?