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1. ### Can pressure stop a reaction?

We are using metal piping with a volume of .03 L. Is it that the volume is smaller so therefore we are not getting enough temperature out of the reaction and therefore not getting enough pressure? We can get the temperature of the reaction to about 100 degrees Celsius through calorimetry and we...
2. ### Can pressure stop a reaction?

So i am mixing Magnesium and water (the MRE heaters) in about a .3 mL container with a ball valve. It's reacting but not as well as usual, like in an unpressurized container such as a 2 liter coke bottle. It's just not producing enough Hydrogen (yes my calculations and ratios are correct) to get...
3. ### What happen's if one cell organelle quits working

what happen's if one cell organelle quits working how does it affect the cell?
4. ### Pulley Physics Help: Solve Force to Move Boxes

is the norml force equal to the mass times gravity?
5. ### Pulley Physics Help: Solve Force to Move Boxes

yea but i don't have the normal force. the force of both of the boxes down ward is 147N but that's down wards. how do i find the normal force, and in what dirrection
6. ### Pulley Physics Help: Solve Force to Move Boxes

o also our teacher said that the rope is massless and has no friction between the pullie thingy.
7. ### Pulley Physics Help: Solve Force to Move Boxes

so I am kinda going off of what i think but am sure its not the correct way to solve it. Friction can be a deseleration and to find force you do F=MA. so for each box moving in a given direction with friction their is a force acting in the opposet direction, so i put 2.5N for box1 and 7N for box2.
8. ### Pulley Physics Help: Solve Force to Move Boxes

Homework Statement ok so box 1 (5kg) is ontop of box 2 (10kg) and this guy has to pull the box with an unknown force, but the boxes are on a pulley conected to a wall (not a celling). The coefficient of static friction between the box and the floor is .9. The coefficient of kinetic friction...
9. ### Kinematics: Solving Questions on Ball Thrown off 50m Cliff

i need help on the 3rd problem. so i have the time in air (4.508) and the length of the base of the cliff (85.891). now what do i do to find the max hight.
10. ### Kinematics: Solving Questions on Ball Thrown off 50m Cliff

thank you very much i asked my teacher and for sum reason when i changed it from radians to degrees it worked (i did that at home and got the same answer, i think teachers are magical or somthing, lol). thank i now know how to do this it was just a matter of my calculator acting funny, i new how...
11. ### Kinematics: Solving Questions on Ball Thrown off 50m Cliff

thank you now this might be dumb but how did you get 11m/s and 19.1m/s. when i put the veloctiy times the sin of 30 i got a negative number, what did i do wrong?
12. ### Kinematics: Solving Questions on Ball Thrown off 50m Cliff

thank you i rember going over most of thows equations in class but our teacher said so far all we need in the Xf equation and the Vf equation. what he has shown us in class to get the velocitys in both dirrections is to use trig. well i do that but i get negative numbers, why, what am i doing wrong?
13. ### Kinematics: Solving Questions on Ball Thrown off 50m Cliff

Homework Statement A ball is thrown off the top of a 50 m cliff at an angle of 30 degrees with a velocity of 22 m/s. How long is the ball in the air in s? How far from the base of the cliff does the ball land in m? What is the maximum height reached by the ball in m? Homework...
14. ### Knematics finding velocity

I think i did my algebra wrong because it said it was wrong. (49.88+50)/3.194= 31.305
15. ### Knematics finding velocity

what does s represent in this?
16. ### Knematics finding velocity

Homework Statement A person throws a rock horizontally from the roof of a 50m building. The rock lands 70 m from the base of the building. How long was the rock in the air in s? I got 3.194. The online home work thingy (webassign) said I was right. With what velocity was the rock...
17. ### Can i please get a little help on this problem i dont think i did it right.

Shouldnt the answer be in g's? Thats what really throughs me off.

Thanks
19. ### Can i please get a little help on this problem i dont think i did it right.

So, how much weaker is the force of gravity at 500 kilometers above Earth's surface? Calculate how much of a g force the astronauts are actually experiencing. This equation can be modified for any other planet by replacing using the planet's radius and its surface gravity (how many g's). this...
20. ### Why do plains, shuttles, & man made things that fly have 3 wings?

just one question now that I took a better look at it. can i have the empennage in the rear but extend to the front?
21. ### Why do plains, shuttles, & man made things that fly have 3 wings?

ok thank you.
22. ### Why do plains, shuttles, & man made things that fly have 3 wings?

so is their any way to have the empennage in the front? maybe have it in the rear but extent all the way to the the front? i red an article from NASA explaining it but i wasn't able to comprehend it all the way. http://quest.nasa.gov/aero/planetary/atmospheric/s+c1.html
23. ### Why do plains, shuttles, & man made things that fly have 3 wings?

now if the empennage was moved to the front and the back wings are still in the back couldn't the craft have a better turning ratio? Also wouldn't the lift be not only in the back of the craft but in the front as well?
24. ### Understanding Life Support Systems

then you could really help me in my WAS program, right?
25. ### Why do plains, shuttles, & man made things that fly have 3 wings?

Thank you all.
26. ### Why do plains, shuttles, & man made things that fly have 3 wings?

thank you, also from what I've reserched it can be a called an empennage. Does anyone know why there alwase in the rear of the craft?
27. ### Why do plains, shuttles, & man made things that fly have 3 wings?

thank you that does help a lot but also from what I've reserched it can be a called an empennage. Does anyone know why there alwase in the rear of the craft?
28. ### Why do plains, shuttles, & man made things that fly have 3 wings?

why do plains, shuttles, & man made things that fly have 3 wings? My parents told me it was so the craft doesn't go into a constant spin. But like i wanta know more like in layman's turms and in picktures and stuff. Can anyone help me please?
29. ### Understanding Life Support Systems

wow that's a lot of stuff that i really wanta learn but i don't curntly. lol. what sciences do you learn that stuff in?
30. ### The ecliptic planes of the Milky Way and the solar system

could be that's an interesting question though.
31. ### Understanding Life Support Systems

ok so then it would be in both the suite and shuttle. Now why must CO2 be removed? I mean that's really (except for the 1% [including carbon] of other gases we breath) what we breath in, on this world? So i mean what's so bad about it if this compound has oxygen?
32. ### Understanding Life Support Systems

What exactly is life support? Is it somthing on the shuttle or in their suites? Is it just somthing to recreat the environment of Earth? Please can some one elaborate?
33. ### Help me im in WAS and i need to know Delta V. .

ok thank you. You made it seem a hell of a lot easyer then what it looked like.
34. ### Help me im in WAS and i need to know Delta V. .

ok so i came up with:it needs to travel 792,000ft to reach the 60 mile marker, and decreases 150 miles. am i right? sorry it took 4 ever i seam to compliate things and think of them in a bigger perportion even though they really arnt.
35. ### Help me im in WAS and i need to know Delta V. .

thank u so much man i will try it out and if u could tell me if it is right i would apreciate it. i should have it done soon.
36. ### Help me im in WAS and i need to know Delta V. .

ok so then (if i understand u) from what the question stated (for its speed) every time its decreasing a mile its travaling 2fps below a 500 mile altitude above the Earth? So then really their asking me: when is the shuttle going to reach a perigee of 60 miles and how meny mile's/fps? I will try...