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artcher [175]
3 years ago
15

Does a rolling ball on a level floor have PE or KE? Explain.

Physics
1 answer:
ANEK [815]3 years ago
8 0
Kinetic energy since if its rolling is already using the stored potential energy that it had before it was given an amount of energy to release it for a given time
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Identifying Characteristics Common to All Protists Use the drop-down menus to complete the statements. All protists live in envi
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Answer:

Use the drop-down menus to complete the statements.

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which of the following laboratory tool would be most appropiate for measuring the approximate volume of a liquid?
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A well-insulated electric water heater warms 131 kg of water from 20.0°C to 51.0°C in 31.0 min. Find the resistance (in Ω) of it
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Answer:

Explanation:

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= mct

= 131 x 4150 x ( 51 - 20 )

= 16853150 J

Power of heating element

= v² /R

Heat generated in 31 min

= (v² / r ) x 31 x 60 = 16853150

r = (240 x 240 x 31 x 60) / 16853150

6.35 ohm

In this case heat required will change so time will also change

Heat required =

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= 26638850 J

If time required be t hour

Energy consumed

Power x time

=  (v² / r ) x t  x 60 = 26638850

t  = 26638850 x 6.35 / (240 x 240 x 60 )

= 48.95 h

Heat required to evaporate water at 100 degree

= mass x latent heat

= 131 x 2260000

= 296060000 J

Total heat required

= 296060000 + 26638850 + 16853150

= 339552000 J

time required = 339552000 x 6.35 / (240 x 240 x 60 )

= 623.88 h .

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3 years ago
If the chain reaction is not controlled, what can happen?
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Answer: An uncontrolled chain reaction can become highly explosive. That is because these reactions can release a very high amount of energy at a time. For example, the radioactive isotope Uranium-235 can undergo nuclear fission be releasing neutron slowly.

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