Given that a shape is a parallelogram, which of the following is sufficient to state that it is also a rectangle?
a. the opposite sides are of equal length.
b. the diagonals are of equal length.
c. the opposite sides are parallel.
d. the diagonals bisect each other.

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?