If a 1600-kg vehicle travels at 10 m/s (or approximately 22 mph), then find its kinetic energy in kilojoules (kj).

The kinetic energy of a moving body is given by,

Here, m is mass of the body, v is its velocity.

Given,   m= 1600-kg and v = 10 m/s.

Substituting these values in above equation, we get

In kilojoules,

Thus, the kinetic energy of vehicle is

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

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.