Which of the following statements describes electromagnetism? A. Magnetism can create electricity, and electricity can create magnetism.
B. Magnetism and electricity are actually the same thing.
C. Magnets can do work, and electricity also does work.
D. Electricity and magnetism are both flows of electrons.

The isotonic saline solution described in part a is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. based on this information, what can be said about these two solutions?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]