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Here is the velocity-time graph of a car
for 40 seconds.
a) Work out the average
acceleration during the
40 seconds.
Give the units of your answer.
30
Velocity
(m/s)
20
10
b) Estimate the time during the
40 seconds when the
instantaneous acceleration
is equal to the
average acceleration
You must show your working
on the graph to get full marks.
Answer seconds
Give your answer to
the nearest second
0-
0
10
30
40
20
Time (s)
Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)
The police chief wants to know if the cityβs african americans feel that the police are doing a good job. identify the management problem (i. e dependent variable) and identify the independent variable.