How much heat is contained in 100 kg of water at 60.0 °C? (Hint: A substance at absolute zero, -273o C, has 0 heat content.) Be mindful of significant figure rules for both multiplication and addition.

2.10 x 10^4 kcal
2.40 x 10^4 kcal
30 kcal
2.77 x 10 4^kcal

Please provide an explanation

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

The ozone hole appears in antarctica during

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?