Tuesday
May 21, 2013

# Posts by zoey

Total # Posts: 90

Chemistry
Consider the following reaction. 4 Al(s) + 3 O2(g) → 2 Al2O3(s) It takes 1.00 L pure oxygen gas at STP to react completely with a certain sample of aluminum. What is the mass of aluminum reacted?

Math
The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

Math
If both masses are increased by 60% and the distance between them is halved, by what percent will the force of attraction increase?

Math
If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

Math
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely proportional to the square of the distance from the light source. If a desk is properly illuminated by a 74.0 w lamp 8.00 ft from the desk, what size lamp...

science, ocean currents
waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

science, ocean currents
waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

Math
\$9 dollars

physics
At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 81 km/h to 117 km/h?

geometry
The hypotenuse of a right triangle is 25 cm long. One leg of the same triangle is 7 cm long. What is the length of the other leg? Explain how you found your answer.

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