Which of the following statements are true?
1) kinetic energy is conserved.
2) linear momentum is conserved.
3) angular momentum of the stick+puck is conserved about the center of mass of the combined system.
4) angular momentum of the stick+puck is conserved about the (stationary) point where the collision occurs.
1.1 only
2.2 only
3.3 only
4.4 only
5.1 & 2
6.1 & 4
7.2 & 4
8.1 2 & 3
9.2 3 & 4

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

In the nineteenth century, gregor mendel first determined some basic rules of genetics that have been observed throughout all types of life. no observations have disproved these basic rules of genetics. charles darwin developed the idea of biological evolution around the same time, but he was unaware of mendel’s discoveries in genetics. over a century later, darwin’s idea of evolution was modified in order to incorporate mendel’s rules of genetics along with the other evidence that darwin had used. what is most likely the relationship between mendel’s rules of genetics and darwin’s idea of biological evolution? a.)mendel’s genetics states laws that are now part of the theory of biological evolution. b.)biological evolution states laws that are part of mendel’s theory of genetics. c.)mendel’s genetics replaced darwin’s entire concept of biological evolution. d.)biological evolution is a law that explains why all genetics exist.

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel