Velocity is a vector quantity, follows law of vector addition, has both direction and magnitude while speed is a scalar quantity , follows law of algebra and only has magnitude
Answer:
wY
Explanation:
it increases my mercury righy basically also on the atmosphere pressure
Answer:
A decrease in length, or the use of a material with lower resistivity, or an increase in the cross-sectional area of the wire
Explanation:
The resistance of a wire is given by
where
is the resistivity of the material of the wire
L is the length of the wire
A is the cross-sectional area
We see that:
R is directly proportional to and L - therefore if we decrease one of these two, the resistance of the wire will decrease too
R is inversely proportional to A - therefore if the increase the cross-sectional area, the resistance of the wire will decrease
It is less, because the blocks have velocities in opposite directions before the collision, so some of their kinetic energy cancels.