In an experiment a student observed the magnification produced by three mirrors A, B and C. It is found that A produces constant magnitude of magnification with same sign always while B produces magnifications of different magnitudes and sign depending on the position of the object. Mirror C produces magnifications of different magnitudes depending on the position of the object with same sign always. The mirror A, B and C respectively a) plane mirror, concave mirror, convex mirror
b) plane mirror, concave mirror, plane mirror
c) convex mirror, plane mirror, concave mirror
d)concave mirror, convex mirror, plane mirror

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

What is the equation for electrical work?

What structural formula represents 4 electrons shared between two atoms?