Answer:
there's gravity on earth so it's heavier
Acoustic Energy
Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects
Answer:
30 N
Explanation:
there are two forces act on the bar:
- weight of 1.5 kg mass, w = mg = 15 N
- weight of the bar, wb
for balance,
w * Lw = wb * Lwb
Lw = length of bar from the mass to the pivot
Lwb = lenght of bar from the center of the bar to the pivot
15 * 20 = wb * (50-20)
300 = wb * 30
wb = 300/30 = 30 N
Answer:
The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.
