Which of the following always causes change in speed, direction, or both? a balanced forces b unbalanced forces c either balanced or unbalanced forces d any combination of forces

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

What happens when the vapor pressure of a liquid is equal to the external pressure?