A80-cm-wide object seen through an optical device appears inverted and 50 cm wide. what is the magnification of the optical device? a. 1.3 b. 0.63 c. -0.63 d. 2.5 e. -1.3

In a system, when potential energy decreases, then entropy also decreases. true false

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.