Speed = (distance) / (time)
Speed = (100 mi/2 hr)
Multiply by a fraction equal to 1 :
Speed = (100 mi/2 hr) x (1 hr/60 min)
Speed = (100 x 1 / 2 x 60) (mi-hr/hr-min)
Speed = (100 / 120) (mi / min)
Speed = 5/6 mi/min
<em>Speed = 0.833... mi/min</em>
Answer:
F = m a = m v / t where v is the change in velocity in time t
F = p / t since m v is equal to p
F = 2.2 (kg m / s) / 1.1 s = 2 kg-m / s^2 = 2 N
Or you can use the impulse equation
Sound waves travel faster through <em>solids</em> than they do through gases or liquids. <em>(C) </em>They don't travel through vacuum at all.
Example:
Speed of sound in normal air . . . around 340 m/s
Speed of sound in water . . . around 1,480 m/s
Speed of sound in iron . . . around 5,120 m/s
The flow of electrons in the circuit will be less.
