Which statements explain the relationship between mass, velocity and kinetic energy? Consider the equation to calculate kinetic energy: KE = ½mv2 1. Kinetic energy increases if either the mass or the velocity of the object increases or if both increase.

2. Kinetic energy decreases if either the mass or the velocity of the object increases or if both increase.

3. Kinetic energy decreases if either the mass or the velocity of the object decreases or if both decrease.

4. Kinetic energy increases if either the mass or the velocity of the object decreases or if both decrease

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

How many atoms of nitrogen are in the chemical formula ni(w on