Task 5: /13 a) TF A falling object doubles in speed so has fallen half the original height. b) TF Jeff has twice the power of Tom. Tom will need twice the time to do the same work as Jeff. c) TF Jimmy carrying a backpack up a flight of stairs is an example of zero work done because the force is vertical. d) TF If you half the heat capacity of an object the object will feel colder. e) TF Frequency of a sound wave increases as the air temperature increases. f) TF Standing waves require reflection of waves g) TF Reflecting waves invert the frequency. h) TF The heat capacity of a metal is generally less than that of water. i) TF A car at constant velocity experiences no work from the applied force. j) TF Alex moves a crate 5.0 cm horizontally with an applied force of 7.0 N. The work done is 35.0 J k) TF Adding a resistor will always reduce the current in a simple circuit. I) TF The motor force is always 180 to the current