Speed is the absolute value of velocity. Speed being a scalar (magnitude) and Velocity is a vector (magnitude and direction). Both speed and velocity have to deal with magnitude. An example would be that speed would be 15 miles/hour while velocity would be 15 miles/ hour towards the west.
If it's a straight line it either means its zero or going at a constant speed.
B. Two water<span>molecules interact to form a hydronium ion and a hydroxide ion. This is basically the definition of the process.</span>
Momentum = Mass x Velocity
80kg Runner: 80 x 2.45 = 196 Kg m/s
65kg Runner: 65 x 3= 195 Kg m/s
The 80kg runner has a greater momentum
Googles Definition of Convection: <span>the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
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