specific gravity of the unknown sample = 2.68
Explanation:
True weight of solid=31.6 N
Apparent weight=19.8 N
loss in weight= 31.6-19.8=11.8 N
Loss in weight= weight of the liquid displaced
so weight of water displaced= 11.8 N
now specific gravity= weight of object/ weight of liquid displaced
specific gravity= 31.6/11.8
specific gravity= 2.68
Answer:
b
Explanation:
i guessed annd got it right
<span>Newton's first law of Motion is often referred to as the "Law of Inertia."</span>
Answer:
electrical power is converted by the speaker into sound power 17.25 %
Explanation:
given data
radius = 0.1158 m
power needed = 27.0 W
average sound intensity = 25.6 W/m²
solution
we know sound intensity that is
I = 
...................1
power = intensity × area
Power = 25.6 × 4 ×π×r²
Power = 25.6 × 4 ×π×0.1158²
power = 4.313 W
so here electric power % into sound power
= 
× 100
= 17.25 %
Answer:
The generator will work only if the magnetic field associated with the turns of coil change.
here both magnet and coil are stationary with respect to each other so no electromagnetic induction would take place. so no indiced current will be produced.
the student has to introduce some mechanism either to rotate the coil or the magnet
