A) lighting an electric lamp as it becomes darker
If it increased its speed steadily at a constant rate, then the average speed for the minute was
(1/2)(10m/s + 20m/s) = 15 m/s .
Rolling at an average speed of 15 m/s for 1 minute (60 seconds), it travels
(15 m/s) (60 sec) = 900 meters
The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
The trade winds are located about 30 degrees north and south of the equator.
Answer:
The surface tension of plain water can cause a needle to float.
Evidently, the addition of detergent to the water reduces the surface tension of the liquid causing the needle to sink.
