Sun 23 Oct, 2005 10:14 pm - How can i use the local linearization to derive the product rule? Does is have something to do with the definition of the derivative (f(x+h)= f(x) + f'(x) h)? Thanks~ (view)
Tue 4 Oct, 2005 09:58 pm - what are fruit punch/ sports drink /soda have to do with conductivity? Should I find out about their chemical equations first? thnx (view)
Tue 4 Oct, 2005 09:43 pm - how can i prove the solutions (NaCl and HCl) are strong conductors with equations? Is it like this?
NaCl(aq) -> Na+ (aq)+ Cl- (aq)
then when will I know if it's a weak conductor? thnx (view)
Wed 28 Sep, 2005 12:16 am - I learned that the global CO2 concentration is increasing and the global average temperature is currently increasing, too. And i think the change in temperature correlated with the change in CO2... (view)
Tue 27 Sep, 2005 12:15 am - if a function f has f(5)= 20, f'(5)= 20, and f''(x)<0, for x>= 5. what is possible or impossible for f(7)? 26? 24? 22?
i guess the graph is kind of like a concave down graph... (view)
Tue 27 Sep, 2005 12:10 am - P(t) is the price of a share of stock of a corporation at time t.
"the price of the stock is rising faster & faster": what does this tell us about the signs of first and second... (view)
Tue 20 Sep, 2005 11:57 pm - We did a lab of measuring the weight and density of pennies made in different years. Is there any reasons why a penny might get heavier as it gets older (the water in the air??)? any reasons why it... (view)
Wed 14 Sep, 2005 11:47 pm - A sprinter can accelerate with constant acceleration for 4.0 s
before reaching top speed. He can run the 100-meter dash in
10 s. What is his speed as he crosses the finish line?
?????? (view)
Wed 14 Sep, 2005 11:46 pm - You're late for the train. You run as fast as you can, but just as you reach the platform you see your train, 30 m ahead of you down the platform, begin to accelerate at You chase after the... (view)
Wed 14 Sep, 2005 11:41 pm - A 1000kg weather rocket is launched straight up. The rocket
motor provides a constant acceleration for 16 s, then the motor
stops. The rocket altitude 20 s after launch is 5100 m. You can
ignore... (view)
