100.0 g of a 4.0^°c water is heated until it's temperature is 37 °c. if the specific heat of water is 4.18 j/g°c calculate the amount of heat energy needed to cause this rise in temperature.

We can use the heat equation,
Q = mcΔT 

Where Q is the amount of energy transferred (J), m is the mass of the substance (kg), c is the specific heat (J g⁻¹ °C⁻¹) and ΔT is the temperature difference (°C).

Q = ?
m = 100.0 g
c = 4.18 J/g°c

ΔT = (37 - 4) °C = 33 °C

By applying the formula,

Q = 100.0 g x 4.18 J/g °C x 33°C

Q = 13794 J

Hence, needed energy is 13794 J.

not too sure thinking it will always be directed towards the centre of the earth. could be wrong not sure

d. air pressure decreases as altitude increases.