We know that d=m/v where d is density, m is mass and v is volume. Lets transform formula to get v in times of d and m
Now we have to substitute our data to formula
V=
ml - its the answeer
Now we have to substitute our data to formula
V=
5. What two factors can increase the force of air resistance for an object?
2 answers:
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The currents in the wires are in opposite directions.
- Two long parallel wires separated by a distance 'r' having current
and
have force per unit length which is given by
.....(1) where
is permittivity of free space whose value is
.
If the current flowing through the wire are in same direction then they the wire attract each other and if the current flowing through the wire are opposite in direction then they the wire repel each other .
As it is given that two wires repel each other which means that current in the wires are in opposite direction .
Hence current flowing through wires are opposite in direction.
Learn more about force per unit length here :
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