According to the Newton’s first law of motion , which of the following objects will change in motion A. a biker on a smooth and level road , pedaling at a constant rate .
B. a train pulling on another train , each with the same amount of force .
C. a ball rolling across the floor with friction acting in the opposite direction.
D. A chair sitting on the floor with balanced forces acting in opposite directions.

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

If forces acting on an object are unbalanced. true or false