100 g of water are cooled and the enthalpy change is -12,540 J. What is the change in temperature of the water? A. -20 K
B. -30 K
C. 20 K
D. 30 K

Difference between series and parallel circuits

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .