Short Answer
The graph in the figure shows the position of an object as a function of time. The letters
H-L represent particular moments of time. 
(a) At which moment in time is the speed of the object the greatest?
(b) At which moment in time is the speed of the object equal to zero?
Definitions:
Related Questions
Q10: A flat circular coil has 250
Q32: A package is dropped from a helicopter
Q49: An object that is 3.4 mm tall
Q52: An ideal Carnot engine is operated as
Q124: If we double the frequency of a
Q126: As part of a piece of optical
Q135: A plant that is 4.0 cm tall
Q382: What must be your average speed in
Q466: The velocity <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB34225555/.jpg" alt="The velocity
Q515: If a quantity you calculated has units