Answer:
Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces. Archimedes' principle is a law of physics fundamental to fluid mechanics. It was formulated by Archimedes of Syracuse.
Answer:
Explanation:
1)Solution,
Distance(s)=30m
Time taken(t)=11s
Now,
Average velocity=s/t=30m/11s=2.72m/s
2)Solution,
Distance(s)=20km=20x1000m=20000m
Time(t)=9:30-8:30=1:30=60+30 min=90min=90x60=5400s
Now,
Average velocity=s/t=20000m/5400s=3.7m/s
Answer:
, it will sink
Explanation:
The density of an object is given by

where
m is the mass of the object
V is its volume
For the body in the problem, we have
m = 4 kg = 4000 g

Therefore, its density is

And the object will sink in water, because its density is larger than that of water, which is
. (an object sinks when its density is larger than that of water, otherwise it floats).
The SI unit of energy is the Joule .
Any kind of energy ... electrical, mechanical, nuclear, solar,
wind etc. It's easy to change from one form to another ... we
do it every day ... and they all have the same unit.