Block a slides down a ramp whose slope is 45°. an identical block b slides down a ramp whose slope is 60°. both blocks start at a height of 2 meters. compare the kinetic energies (ke) of the blocks just before they reach the bottom, assuming there is no friction.
a) they are the same
b) block a's pe is greater than block b's pe
c) block b's pe is greater than block a's pe
d) the actual masses must be known in order to figure this out

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

State one important difference between a physical change and a chemical change?