You turn on a light and observe cockroaches scurrying to dark hiding places. wha have you observed?

When the wagon's brakes are off, the engine pulls the wagon forwards. A frictional force also acts on the wagon. In what direction does the frictional force act?

Brahe's concept of the planetary system was most like that of Ptolemy Copernicus Galileo Aristarchus

A 6.0 kg block, starting from rest, slides down a frictionless incline of length 2.0 m. When it arrives at the bottom of the incline, it's speed is vf. At what distance from the top of the incline is the speed of the block 0.5vf?

Using the rules for significant figures, what do you get when you subtract 15.54 from 508.9538?

John is asked to calculate the power output of a machine. What unit should be use for his answer? A. Newton B. Watt C. Joule D. Meter

Approximately how much electrical energy does a 5-W light bulb convert to radiant or thermal energy in one hour

If a clock expends 2 W of power from a 1.5 V battery what amount of current is supplying the clock?

The rectangular plates in a parallel-plate capacitor are 0.063 m * 5.4 m. A distance of 3.5 * 10-5 m separates the plates. The plates are separated by a dielectric made of Teflon, which has a dielectric constant of 2.1.

What connection does salt have with acids and bases?

All of the following are types of telescope except