One day you’re reading a popular diet blog, in which the author claims that if all you do is simply drink a sufficient amount of ice water every day, you could lose as much as half a pound each week. The claim is that your body must warm the ice water from 0°C to the body temperature of 37°C and that takes energy at the expense of body fat. Thankfully, you just finished discussing heat in your physics class, so you can calculate how much energy is expended in drinking ice water and how much fat will be lost. A) How much energy, in kilocalories, is required to warm 2.2 liters of ice water from 0°C to 37°C?
Q =

B) Assuming it takes 3300 kcal to “burn” one pound of fat, how many pounds could you lose per week just by drinking 2.2 L of ice water every day?
mfat = 0.4

learn it on the intertant so you can solve

true

explanation:

hypothesising or postulating

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.