2 A student investigates material from different skijackets
Plan a simple, fair experiment to measure how much energy is
transferred across the different materials in 10 minutes. Use the
equipment in Figure 2.
Figure 2
thermometer
beaker

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

The slope of a velocity time graph over any interval of time gives the during that interval

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.