Water boils at 100oC at sea level pressure.
Select the situation(s) where water will boil at greater than 100oC.
Select one or more:
a.
Inside a pressure cooker.
b.
In Armidale, New South Wales (980 metres high).
c.
Inside an evacuated vacuum chamber where the pressure is 10−5 atmospheric pressure.
d.
In the eye of a cyclone or hurricane.
The number, N, of people who eventually hear a rumour spread by the mass media by time t, in days, is given by the formula N = a(1−e^(−k*t)) for positive numbers a and k. Suppose 5, 000, 000 people hear a rumour eventually. Further, 10% of them heard the rumour in the first day. Find the values of a and k. What percentage of people heard the rumour on the second day?
1 answer