A student conducts an experiment studying the effect of force on mass. She changes the mass of the cart and determines the force required to produce a constant acceleration in each case and a graph of her data is as in fig. Determine the constant acceleration of the cart from the graph. 0.5 m/s2
2.0 m/s2
2.5 m/s2
0.2 m/s2

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.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2