To calculate the total change in elevation or temperature, we need the values that you mentioned (the speed of the tram, the time it traveled, the initial temperature, and the total cooling in the lab).
(a) If a tram moved upward at a speed of x meters per second for y seconds, the total change in the tram's elevation can be calculated using the formula:
\[ \text{Total Change} = \text{Speed} \times \text{Time} = x \times y \]
So, if you provide the values for x and y, I can give you the total change in elevation.
(b) If a substance was cooled by z degrees over a period of w hours, the change in temperature each hour can be calculated as:
\[ \text{Change in Temperature per Hour} = \frac{\text{Total Change}}{\text{Time}} = \frac{z}{w} \]
Again, I would need the values of z and w to provide the change in temperature each hour.
Please provide the missing values so I can help you with the calculations!