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victus00 [196]
3 years ago
6

Which of the following is an example of an insulator?

Physics
2 answers:
charle [14.2K]3 years ago
7 0

Answer:

Hey mate

Answer is glass

butalik [34]3 years ago
4 0
The answer is letter D
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How does this pendulum demonstrate the law of conservation of energy?
muminat

Answer:

I'm sorry but I dont really know this answer

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3 years ago
In this diagram, which force is represted by L?
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Answer is a) the force caused by the wend nag encountering wind and air.
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heat engine operating between 100 °C and 700 °C has an efficiency equal to 40% of the maximum theoretical efficiency. How much e
ipn [44]

Answer:

Explanation:

Theoretical efficiency = T₁ - T₂ / T₁ where T₁ and T₂ is absolute temperature of hot and cold end of the heat engine.

= 600 / (273 + 700 )

= 600 / 973

= .6166

operating efficiency = 40% of .6166

= .4 x .6166

= .2466 = 24.66 %

efficiency = work output / heat input

= 5000 / heat input = .2466

heat input = 5000 / .2466

= 20275.75 J .

HEAT EXTRACED = 20275.75 J.

3 0
3 years ago
When you walk along a floor, what pushes you along?
Elenna [48]

Answer:

n order to walk across the floor, you push backwards on the floor with your foot. Newton's Third Law says that the reaction force to this action force is "floor pushes you forward" (Action: You push floor backwards. Reaction: floor pushes you forward.) So, when you walk, it is the floor that pushes you along!

Explanation:

3 0
3 years ago
How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 3.33×10−21 n
qwelly [4]

Answer:

The number of excess electrons on each sphere is 759

Explanation:

Given that,

distance , d = 20 cm

                    = 0.20 m

let the number of electrons is n  

Electric force (F) = k × (n × e)² /d²

3.33 × 10^{-21} = 9 × 10^{9} × (n × 1.602 × 10^{-19})² /0.2²

solving for n

n = 759

4 0
4 years ago
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