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Keith_Richards [23]
3 years ago
12

A child is sliding down a slide at the playgound. is mechanicalenergy conserved

Physics
1 answer:
Flauer [41]3 years ago
5 0

No. Mechanical energy is not conserved.  There's quite a bit of friction on the slide.  So some of the potential energy is lost to heat on the way down, and the child arrives at the bottom with hot pants and less kinetic energy than you might expect.

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When a light bulb is connected to a 4.5 V battery, a current of 0.16 A passes through the bulb filament. What is the resistance
larisa [96]

Answer:

R = 28.125 ohms

Explanation:

Given that,

The voltage of a bulb, V = 4.5 V

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We need to find the resistance of the filament. Using Ohm's law,

V = IR

Where

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So,

R=\dfrac{V}{I}\\\\R=\dfrac{4.5}{0.16}\\\\R=28.125\ \Omega

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5 0
2 years ago
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tangare [24]

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vovangra [49]

Answer:

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Fittoniya [83]

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