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Inessa05 [86]
3 years ago
12

Which of the following describes a risk associated with the use of hydropower as an energy source?

Physics
1 answer:
castortr0y [4]3 years ago
5 0
Its A: the use of hydropower often changes the natural flow of water through an ecosystem 

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What is the idea behind the law of multiple proportions?
Akimi4 [234]

Answer:

The law of multiple proportions states that when two elements can combine in different ratios to form different compounds, the masses of the element combining with the fixed mass of another element result in whole number ratios. This shows that the law of multiple proportions is followed

Explanation:

5 0
3 years ago
A screw having 50% efficiency is driven by a rod and 25 cm. The pitch of the screw is 1/10cm Calculate velocity ratio and mechan
neonofarm [45]

(a) The velocity ratio of the screw is 1570.8.

(b) The mechanical advantage of the screw is 785.39.

<h3>Velocity ratio of the screw</h3>

The velocity ratio of the screw is calculated as follows;

V.R = 2πr/P

where;

  • P is the pitch = 1/10 cm = 0.1 cm = 0.001 m
  • r is radius = 25 cm = 0.25 m

V.R = (2π x 0.25)/(0.001)

V.R = 1570.8

<h3>Mechanical advantage of the screw</h3>

E = MA/VR x 100%

0.5 = MA/1570.8

MA = 785.39

Learn more about mechanical advantage here: brainly.com/question/18345299

#SPJ1

4 0
2 years ago
A cylinder 0.170 m in diameter rotates in a lathe at 530 rpm . what is the tangential speed of the surface of the cylinder?
Ad libitum [116K]
Diameter = 0.170 meter
Circumference = 0.170 π meters

530 rpm = 530 circumferences / minute

               =  (530 x 0.170 π meters) / minute

               =      283.06 meter.minute

               =        4.72 meters/second
8 0
2 years ago
A street light is on top of a 8 foot pole. Joe,
zubka84 [21]
8/4 = y/y-x

8y - 8x  = 4y

y = 2x

y = 2 x 4

y = 8

Hope this helps
5 0
3 years ago
Which of the following BEST describes what a thermometer measures
asambeis [7]

A theromometer is the increase or decrease of earths atmospheric temperture, thats how you would measure the temperture of the air around you.

7 0
2 years ago
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