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Ira Lisetskai [31]

3 years ago

11

Calculate the power rating of immersion heater used for 10 mins to increase the temperature of 10kg of water by 15k Take SHC of

water
$4200kg$
$4200kg - ^1 k - ^ 2$

1 answer:

MArishka [77]3 years ago

4 0

Answer:

P =

$\frac{mc{q2 - q1}{t}$

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Answer:

Explanation:

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Answer:

v = 2.18m/s

Explanation:

In order to calculate the speed of Betty and her dog you take into account the law of momentum conservation. The total momentum before Betty catches her dog must be equal to the total momentum after.

Then you have:

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You solve the equation (1) for v:

$v=\frac{Mv_{1o}+mv_{2o}}{M+m}=\frac{(40kg)(3.0m/s)+(15kg)(0m/s)}{40kg+15kg}\\\\v=2.18m/s$

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