Light in a frozen block of ice reflects off the ice-air interface at the surface of the block. What phase shift does it undergo? A) 0°
B) 90°
C) 180°
D) 270°
E) It does not undergo any phase shift.

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.