Manuel and Sandy were partners. Sandy held the accelerometer in her hands while Manuel watched the water line. Throughout Sandy's walk, the water line remained level. What does that tell the students about Sandy's motion? A) Sandy's velocity changed when she slowed down or sped up.
B) Sandy's speed might have changed but her direction did not.
C) Sandy must not have been moving if the water line remained level.
D) Sandy's velocity is constant; her speed and direction did not change.

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?

Which statement is true according to the kinetic theory? a. molecules of different gases with the same mass and temperature always have the same average density. b. molecules of different gases with the same mass and temperature always have the same average volume. c. molecules of different gases with the same mass and temperature always have the same pressure. d. molecules of different gases with the same mass and temperature always have the same molecular mass. e. molecules of different gases with the same mass and temperature always have the same average kinetic energy.

Is cutting your nails a physical or chemical change