science
How to determine the amount of energy released when 50g of 100C steam changes to 0C ice?
Math
A rug covers 1/4 of floor. The area of the rug is 10 ft.2. What is the area of the floor?
Chem 2
If we burn a strip of magnesium in air, there will be two main products, magnesium oxide and magnesium nitride. If we then treat that mixture with water, the nitride ion is converted to ammonia. After boiling away the water and ammonia, we would be left with only magnesium oxi...
Chemistry
How do you demonstrate that fog, clouds,and steam are liquid droplets and not water vapor?
Chemistry
Find the total number of calories needed to change 23.0 g of ice at -34.0C to steam at 222.0C
Chemistry
What is the equation to show that boiling is a cooling process?
Physics
A weight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the greatest? smallest? a.) The elevator rises with decreasing speed b.) The elevator rises with increasing speed c.) The elevator is at rest d.) Th...
Physics
... we havn't even learned about Kinetic energy yet... my teacher must be losing it.... haha
More Physics
I have NO idea how to do this! any help is great! A car with a mass of 1330kg is traveling at 28m/s. The driver applies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it gives me the Mass:...
Physics
A mouse pushes a piece of cheese with a mass of 6.4 g for a distance of 75 cm over a frictionless surface. He exerts a constant 0.5 N force as he does so. If the cheese starts from rest, what is it's final velocity? there is no time or speed givin, which throws me off
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