Answer:
Option D
MA=5
Explanation:
Mechanical advantage is the the ratio of the output force to the input force hence

Substituting 15 inches for the effort arm length and 3 inches for the load arm length then we obtain the mechanical advantage as
Answer:
the answer is A
Explanation: The vertical temperature line indicates no change in temperature at those altitudes.
Earth's atmosphere blocks many types of light including gamma, x-rays most ultraviolet and infrared. So optical telescopes that use visible light and ultraviolet telescopes that are used to study very hot stars are much less effective on Earth.
Answer:
7.5 cm
Explanation:
In the figure we can see a sketch of the problem. We know that at the bottom of the U-shaped tube the pressure is equal in both branches. Defining
Ethyl alcohol density and
Glycerin density , we can write:

Simplifying:

On the other hand:

Rearranging:

Replacing (2) in (1):

Rearranging:

Data:


