Physics - February 2007

Like if your given a molar mass and temperature, what formula can you use so you can get values of the kinetic energy into joules and calories. The only formula I can think of is root((3RT)/M) but that gives meters per second.

2007-02-05 09:18:34 · 1 answers · asked by Peter P 1

a spacecraft in outer space increases velocity by firing its rockets. How can hot gases escaping from its rockets change the velocity of the craft when there is nothing in sapce for the gases to push against?

i just learned momentum and impulse today. But i didn't really understand it. can somebody help please??

2007-02-05 09:17:31 · 4 answers · asked by Ha!! 2

A 6.80 kg mass suspended from a spring with spring constant, k =400 N/m, extends it to a total length of 0.290 m. Find the new total length of the spring when a 15.60 kg mass is suspended

2007-02-05 09:17:25 · 2 answers · asked by bud 1

Hi. I'm doing a project to determine cerebral blood flow using MRI. With this a contrast solution is injected and circulates through the brain bloodvessels. But I need to verify the results I get. Are there phantoms/models of the brain available? Could I make this myself - It should ofcourse be MR-compatable.
Do you have other ideas on how I can verify my MR-cerebral blood flow results?
Thanks! -please brain-storm with me: I'm happy with any answer. -Maybe a gardon hose -or connecting straws? ..

2007-02-05 08:39:05 · 1 answers · asked by Peter R 2

all the equation i've seen has 1/kT, but does that mean (1/k)*T or 1/(k*T)? PS. k is suppose to be Boltzmann constant.

2007-02-05 07:58:38 · 2 answers · asked by trafficer21 4

Call me over protective or nervous, but was anyone else afraid that we were going to have to watch Prince die of electrocution on stage. How can they run a show like that in the super bowl in the pouring rain and not have anyone get electrocuted to death.

2007-02-05 07:58:25 · 3 answers · asked by alwaysmoose 7

I have a science study guide and I have to define how the temperature effects sound. Please help ASAP! Thanks!

2007-02-05 07:54:36 · 5 answers · asked by Theresa S 2

how could you find out which strip of tape, the one pulled off the desk or the one pulled off the back of the other tape, is positively charged?

2007-02-05 07:52:17 · 2 answers · asked by Anonymous

A mountain climber stands at the top of a 50.0 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 1.00 s apart and observes that they cause a single splash. The first stone had an initial velocity of -1.60 m/s.
(a) How long after release of the first stone did the two stones hit the water?
_____s
(b) What initial velocity must the second stone have had, given that they hit the water simultaneously?
_____m/s
(c) What was the velocity of each stone at the instant it hit the water?
first stone ____m/s
second stone _____m/s

2007-02-05 07:45:19 · 1 answers · asked by Anonymous

What dose the following mean: (I am doing an expierement of magnets under heat regaurding to their preformance)

-Hypothesis
-Varibles
-Controls
-Procedures

Thanks!

2007-02-05 07:29:53 · 2 answers · asked by Anonymous

To make iced tea, you start by brewing the tea with hot water. Then you add ice. If you start with 1.0 L of 90.0º Celsius tea, what is the minimum amount of ice needed to cool it to 0º Celsius? Would it be better to let the tea cool to room temperature before adding the ice?

This problem is confusing me.
Please help me.

2007-02-05 07:23:39 · 3 answers · asked by swimmertommy 1

2007-02-05 07:08:40 · 2 answers · asked by Anonymous

What would happen to the radius so your weight would not change?

2007-02-05 06:47:12 · 2 answers · asked by hintzruby 1

There are two cones, which sides touch each other. One of the cones is rotating by angular velocity v1, the other cone can rotate free. What is the angular velocity v2 of the second cone, if:

a)Coefficient of friction between surfaces of cones is a constant and it is equal to a
b)Coefficient of friction is equal to a = kv, where v is a relative speed between the surfaces of cones.

2007-02-05 06:27:14 · 1 answers · asked by Pythagor 1

I was looking pretty much upwards to a tube light for a uni practical where i was lying down for maybe 2 hours. Now everytime I look at things, esp other lights, I see a temporary blueish glow. In fact, car lights are blue/white now. What is happening?

2007-02-05 05:59:23 · 2 answers · asked by YR 2

is it to increase the amplitude of the produced sound by resonance?

2007-02-05 05:57:21 · 3 answers · asked by astrokid 4

A 136.4-g of water at 21.1 C is heated to steam at 125.4 C. How much heat was absorbed?

2007-02-05 05:55:29 · 2 answers · asked by Hey ;) 3

2007-02-05 05:41:40 · 19 answers · asked by Anonymous

2007-02-05 05:38:54 · 7 answers · asked by ? 6

Also, What will be the acceleration of two of these objects glued together if they are pulled by two rubber bands?

2007-02-05 05:34:38 · 1 answers · asked by jchambers86 2

if we shot the bullet on that armor, what happens?

2007-02-05 05:23:01 · 8 answers · asked by Anonymous

According to universal gravitation F=G((m1m2)/(d^2)). If this is true then why is Jupiter smack dab in the middle of the solar system? Wouldn't the gravitational force between the sun and Jupiter be the strongest based upon their mass, and wouldn't the distance need to be greater than that of Neptune or Pluto to keep massive Jupiter in check? I'm in the middle of a physics class and was just curious if anyone knew.

2007-02-05 04:59:59 · 3 answers · asked by Peanut 1

2007-02-05 04:55:52 · 4 answers · asked by JAMES 4

2007-02-05 04:53:58 · 3 answers · asked by Anonymous

2007-02-05 04:46:28 · 6 answers · asked by Chandresh 1

Hi,

Two spherical drops of mercury each have a charge of 0.9 nC and a potential of 390 V at the surface. The two drops merge to form a single drop. What is the potential at the surface of the new drop?

How would I begin this?


Thanks!

2007-02-05 04:45:12 · 1 answers · asked by Anonymous

I've been working on my physics and Einstines' theorys have came across many times. This is something I'd really like explained.

2007-02-05 04:34:37 · 8 answers · asked by Anonymous

2007-02-05 04:24:21 · 4 answers · asked by Anonymous

2007-02-05 04:17:16 · 9 answers · asked by suman s 1

i want to know how to make a binocular loupe. the distance of object is 29 cm. the magnification is 5x. the distance of image can be at 20 cm or more or less.
there are 2 or more lenses uses. i need their diapter or focal length and the distance between them. i may ot use mirror inside the tube and the length between the lenses can become more. that is ok or if someone knows hor to make prism for reducing the length of this magnification loupe it will be appreciated.
thanks.

2007-02-05 04:12:45 · 1 answers · asked by kirtibd 1