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2 years ago

6

Which action best demonstrates the transformation of mechanical energy to heat energy? Select one: a. Digesting a meal b. Burnin

g a candle c. Rubbing hands vigorously d. Melting a piece of ice in sunlight

1 answer:

Anton [14]2 years ago

4 0

<em>(c). </em>Rub vigorously (mechanical) ===> hands get hot (heat energy).

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2 years ago

Read 2 more answers

2. A 55 kg woman has a momentum of 200 kg m/s. What is her velocity?

NeTakaya

Answer:

$\boxed {\tt 3.63636364 \ m/s}$

Explanation:

Velocity can be found using the following formula:

$v=\frac{p}{m}$

where p is the momentum and m is the mass.

The woman has a mass of 55 kilograms and a momentum of 200 kilogram meters per second.

$p= 200 \ kgm/s\\m=55 \ kg$

Substitute the values into the formula.

$v=\frac{200 \ kg m/s}{55 \ kg}$

Divide. Note that the kilograms, or kg, will cancel each other out.

$v=\frac{200 \ m/s}{55}$

$v= 3.63636364 \ m/s$

The woman's velocity is 3.63636364 meters per second.

6 0

2 years ago