Chemistry
Hello Jiskha, I'm hoping you are able to help me with my homework. Its on General Chemistry. Question One - When the solid NH4NO3 is dissolved in water at 25 C, the temperature of the solution decreases. What is true about the signs of enthalpy (H) and (S) for this process...
physics, please help check
A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the horizon...
music
A wind instrument, such as a bassoon, clarinet, flute, oboe, or saxophone, in which sound is produced by the vibration of reeds in or by the passing of air across the mouthpiece.
physics HELP!!
3. A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the hori...
PHYSICS helppppp
A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of the baseball at the mom...
MATH!!!!ASAP!!!
I'm confused with transitive property, substitution postulate, addition postulate, and subtraction postulate. What are they? and What are the differences between them? go to goole i mean google http://library.thinkquest.org/2647/algebra/post.htm fcpaljbk dzebx ntlehufs aot...
riddle - please help
THE ANNSWER IS UP IN THE AIR YOU USE THE I TWICE
COMBINATION!!MATH!!!hurryyy!!!
Cards are drawn at random from a 52-card deck. Find the number of different 5-card poker hands possible consisting of 3 aces and 2 kings? i dont knw how to do this kind of problems..can anyone teach me??? Forget about the fact that there are 52 cards in a deck. The number 52 w...
MATH!!!!ASAP!!!
How can i graph this equation by plug in numbers???? x^2-y^2=9 HELP PLZ!!!!!!THX ALOT!!!! Assign numbers to x and solve for y then put them in a graph: let's say x is -3 Then 9=y^2+9 y^2=0 y=0 Ok now x= -4 16=y^2+9 y^2=5 y=2.236 Also you can assign y a number and solve for...
physics
i dont understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I dont get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was wrong. I doub...
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