Work can be obtained from the following expression
W = F*d
Where F is the force (In this case the force it takes to lift Sarah, which is mass*gravity)
And d is the distance traveled.
W = 60kg*9.8m/s^2 * 4m = 2352 Joules
Answer:
The first is the closest in absolute values.
The second two are vague and the last is approximate.
Compared to coffee at room temperature, the molecules of the coffee at 34°C will be moving faster and colliding with one another more frequently.
Density: Mass/Volume
Volume: 3 x 3 x 3cm
= 27cm
27/27
= 1g/cm^3
