Many jacks and lifts rely on what type of power to raise vehicles?

Many jacks and elevators rely on hydraulic power to lift vehicles.

Explanation:

The hydraulic jack, as well as the hydraulic lift, is a tool that acts as a lever capable of suspending heavy objects. In this sense, it is used to lift a part of the vehicle without the need for it to be completely suspended.

This equipment was created in the 19th century by engineer Richard Dudgeon. Using the Pascal Principle, it basically indicates that any fluid subjected to a specific pressure will expand in all directions until it reaches the container in which it is stored.

Using this principle the hydraulic lift (or hydraulic jack) basically works by a hydraulic unit driven by an electric motor, where this unit generates the force and expansion of the fluids that perform the movement of the hydraulic cylinders raising the lift load.

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

2. multiply 3/4 by 8

step-by-step explanation:

3/4 ÷ 1/8

copy dot flip

3/4 * 8/1

24/4

6