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2 years ago

Please Help!

Physics

1 answer:

Elena-2011 [213]2 years ago

7 0

The cost of the 1.4KW kettle is 0.945 p.

<h3>What is the cost of electricity?</h3>

The cost of electricity is computed from the cost of electricity. We have to know the cost of electricity that is charged for the 1.4kW kettle.

Now let the power consumed=

1.4kW * 0.075 hrs = 0.105 KWhr

Then;

1 KWhr costs 9p

0.105 KWhr costs 0.105 KWhr * 9p/1 KWhr

= 0.945 p

Learn more about cost of electricity:brainly.com/question/16948772

#SPJ1

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a train traveling at 30m/s comes to a complete stop in 20 sec.how far did the train go during the deceleration

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Answer:

600m

Explanation:

v=30m/s

t=20s

s=VT

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3 years ago

Explain two reasons why astronomers are continually building larger and larger telescopes. Explain two reasons why astronomers a

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Answer:

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Explanation:

Refracting telescopes get bigger every day for two main reasons.

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2 years ago

A cannon fires a shell straight upward; 2.3 s after it is launched, the shell is moving upward with a speed of 17 m/s. Assuming

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Answer:

The speed of the shell at launch and 5.4 s after the launch is 13.38 m/s it is moving towards the Earth.

Explanation:

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$u=v+gt\\\\u=17+9.8\times 2.3\\\\u=39.54\ m/s$

The velocity of the shell at launch and 5.4 s after the launch is given by :

$v=u-gt\\\\v=39.54-9.8\times 5.4\\\\v=-13.38\ m/s$

So, the speed of the shell at launch and 5.4 s after the launch is 13.38 m/s it is moving towards the Earth.

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3 years ago

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3 years ago