Wednesday
December 11, 2013

# Posts by Lydia

Total # Posts: 151

physics
Assume you are given two objects whose centre of mass is located exactly at the origin. The first object has a mass of 33 kg and is located at position +30 m with respect to the origin. If the mass of the second object is 7.0 kg, what is its position (in m) with respect to the...

physics
Ian is firmly attached to a snowboard which is on a flat surface of ice, which you can assume to be frictionless. He and the snowboard are initially at rest. He then throws a 138 g ball which travels at a speed of 19.2 m/s, and finds himself moving backwards at a speed of 0.05...

physics

physics
What is the magnitude of the momentum of a car weighing 1,555 N when it is moving at a speed of 23 m/s? Express your answer in kg m/s.

physics
Assuming maximal power output, how long, in seconds, would it take a 1,535 kg car with a 128 hp engine to accelerate from 50 km/h to 102 km/h? (1 hp = 746 W)

social studies
between 1400000 and 500000 years ago early hominids learned how to?

Ecology
Signs of fish stress include A. increased respiration B. faster scale growth C. reduced feeding rates D. both A and C Thanks for the help!

Math
Lee Holmes deposited \$16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional \$41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s account? I have tried a...

Math
Thannk you both of you but both answers are incorrect. I can input the answer to see if it is right and both are wrong. We are all missing something. If anyone else wants to try please do!!!

Math
Lee Holmes deposited \$16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional \$41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s account? I have tried a...

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