1. A force of 60 Newtons is applied to the end of a wrench 0.12 m long. How much torque is produced?

7.2 N.m.

Explanation:

Torque is defined as the force and the distance in which it is acting.

Mathematically,

τ = d × F sin θ

Given:

Force = 60N

d = 0.12m

The force is applied at the end of the wrench, therefore it is applied at 90°.

τ = rF sin θ

= 0.12×60×sin90

= 0.12 × 60

= 7.2 N.m.

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.

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