Which of the following is an example of a physical change but not a chemical change?
a) the log gives off heat and light as it burns
b) a tree stores energy from the sun in its fruit
c) a penny lost in the grass slowly changes color
d) a water pipe freezes and cracks on a cold night

Due sun 06/09/2019 11: 59 pm skip navigation questions correct q 1 [1/1] correct q 2 [1/1] correct q 3 [1/1] untried q 4 (0/1) untried q 5 (0/1) untried q 6 (0/1) untried q 7 (0/1) untried q 8 (0/1) untried q 9 (0/1) untried q 10 (0/1) grade: 3/10 print version start of questions two cyclists, 42 miles apart, start riding toward each other at the same time. one cycles 2 times as fast as the other. if they meet 2 hours later, what is the speed (in mi/h) of the faster cyclist?

Which statements did both aristotle and ptolemy assume? check all that apply.

The inverse square law applies to: intensity of sound gravitational force intensity of light electric force magnetic force