Aconverging lens (l) of focal length f =40 cm, gives for an object ab placed at a distance d from (l) an image a’b’ we give successively to d the following value 10cm indicate with justification the value of a’b’

Identical marbles are released from the same height on each of the following four frictionless ramps . compare the speed of the marbles at the end of each ramp. explain your reasoning

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.