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A simple machine makes the work easier by

1 answer:

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Answer: increasing the distance through which force is applied, by changing the direction of applied force, or by multiplying force of speed of the energy applied. The wheel and axle is a machine in which the wheel is attached to a central axle.

Explanation:

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1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C

Explanation:

Crayon is paraffin wax. The specific heat of paraffin wax is 2.14 J/g°C

As we know

$Q = m*c *\Delta T$

Where

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