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Nataly_w [17]
2 years ago
15

Money is useful to people because it is __________.Select one of the options below as your answer:

Physics
2 answers:
hram777 [196]2 years ago
4 0
A. A medium of exchange .... Hope am right !!!
igomit [66]2 years ago
3 0
The answer is A because money is a form of barter in a sense.
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The fluid inside the hydraulic jack has a pressure of 30,000 Pa. If the surface of
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2 years ago
. Light travels at a speed of about 300 000 km/s. a. Express this value in scientific notation. b. Convert this value to meters
olganol [36]

Answer:

The answer to your question is below

Explanation:

Data

light speed = 300 000 km/s

a) Express it in scientific notation

to do it, we just move the decimal point 5 places to the left

         300 000 = 3.0 x 10 ⁵ km/s

b) Convert this value to meters per hour

  (300 000 km/s)(1000 m/1 km)(3600 s/1 h) = 300000x1000x3600 / 1x1x1

                                                                        = 1.08 x 10¹² m/h

c) What distance in centimeters does light travel in 1 s?

data

v = 300 000 km/s

d = ?

t = 1 s

 formula   v = d/t      we clear distance     d = vxt

                                  d = 300000 x 1 = 300000 km

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4 0
3 years ago
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