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3 years ago

What is the name of the units that are normally used to measure energy?

Physics

1 answer:

Sati [7]3 years ago

8 0

The basic unit of energy is a joule. Kill calories measure the energy available in food.

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Assume a hockey player accelerates from 0 ft/s to 24 ft/s over a period of 2

jekas [21]

Answer:

12ft/s or 4m/s

Explanation:

7 0

3 years ago

The combined focal length of two thin lens is 24 cm and the focal length of one converging lens is 8

qwelly [4]

Answer: f = -12 cm

Explanation: Combined lenses is an array of simple lenses with a common axis. The combination is useful for correction of optical aberrations which cannot be corrected by simple lenses.

When two lenses are in contact and are thin, focal lengths are related as:

$\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}}$

If there is a distance between the lenses, the focal length will be:

$\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}} -\frac{d}{f_{1}f_{2}}$

Since the lenses in the question above are thin and in contact, the focal length of one of them will be:

$\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}}$

$\frac{1}{f_{2}} =\frac{1}{f_{1}} -\frac{1}{F}$

$\frac{1}{f_{2}} =\frac{1}{8} -\frac{1}{24}$

$\frac{1}{f_{2}} =\frac{-2}{24}$

$f_{2}=$ -12

The focal length of the other lens is -12 cm, with the negative sign meaning it's a converging lens.

7 0

3 years ago

1. A ball is thrown vertically upward.

Ghella [55]

Answer:

The acceleration increases.

Explanation:

hope this helps

4 0

3 years ago

Which statement about a right triangle is NOT true?

Alex787 [66]

Answer:

The square of the hypotenuse is equal to the sum of the squares of the other two lengths.

Explanation:

only one that made sense

6 0

3 years ago

Read 2 more answers

What kinds of bonds are possible between carbon and oxygen?

ikadub [295]

covalent bond I think

5 0

4 years ago