50 kg of water at 75o C is cooled to 25o C. How much heat was given off? a
1.05 x 105 J

b
-1.05 x 107 J

c
1.67 x 105 J

d
-1.67 x 107 J

On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius