Which of the following describes acceleration? 1. An object speeding up

2. An object slowing down

3. An object changing direction

4. An object at rest

Group of answer choices

1 and 3

1, 2, and 3

1 and 2

1, 2, 3, and 4

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.