Jen pushed a box for a distance of 80m with 20 n of force. how much work did she do?

The work done is 1600 J.

Explanation:

Given that,

Distance = 80 m

Force = 20 N

We need to calculate the work done

The work done is equal to the product of the force and displacement.

Using formula of work done

Where, F = force

d = displacement'

Put the value into the formula

Hence, The work done is 1600 J.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible