The circuit shown below contains a thermistor arranged in series with a variable resistor, connected to a d. c. input such as a 12 V cell or battery. The resistance of the thermistor decreases as it gets warmer and has a maximum value when it is very cold. Describe a use for this circuit.

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples