Sunday
December 8, 2013

# Posts by serena

Total # Posts: 159

science

physics, math, science
a soccer ball is kicked on the ground at 8m/s. another player is standing 30 m away. if she needs to intercept it at 20m - how much time does she have and how fast must she run?

physics
an object slides off a roof 10 m above the ground with an initial horizontal speed of 5 m per second. the time between the object's leaving the roof and hitting the ground is 1.4s. how far does it land from the wall?

fluid mechanics
A plastic bag is filled with 1 ft3 of air at 17° C at atmospheric pressure. What is volume at 2 atm pressure?

fluid mechanics
What is the pressure change require to change the volume of air by 1%?

Psychology
Pyschologists train rats to fight and scratch each other by shocking them if they are somber. How is that negative reinforcement?

Math
-3x+4y-1=0 +1 +1 -3x+4y=1 -28 -28 -3x=-27 --- --- -3x -3x x=9

Science
what creates the circulation of air or water that forms from uneven heating?

math
A square garden Circular Garden Area= pi r squared=314 meters Square Garden=Length*Width=400 meters

science
-273.15 Degrees Celcius 0 degrees Kelvin

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