Physics - January 2007

what would be the advantage of building an interplanetary spacecraft thatcould accelerate at 1 g (9.8 m/s^2) for a year?


its a part of my lab and i dont understand it and every answer i get i still dont understand..please help!

2007-01-23 13:25:00 · 3 answers · asked by Hidden 4

what are electromotive force (emf) and potential difference? and what is the difference between the two?

please dont make your answer sound like a physics text book!

thank you

2007-01-23 13:24:53 · 5 answers · asked by girlwiththegoodies 3

joe bob bounces a .10 kg tennis ball off a wall. the ball's initial velocity is 12i - 1.4j meters per second. if the wall exerts a constant force of -185i newtons and the ball's final velocity is -11i - 1.4j meters per second, (a) find the ball's change in momentum. (b) how long was the ball in contact with the wall?

2007-01-23 12:54:26 · 2 answers · asked by argentina_mandy20 1

subject?

2007-01-23 12:38:55 · 4 answers · asked by illdaretofly 2

Wind velocity above wing and below wing is know, the air pressure above the wing is known. What is the mass of the plane if it is flat. Also what is the mass of the plane if it is accelrating downward?

Thanks

2007-01-23 12:38:10 · 1 answers · asked by willie131313 1

nuclear decay.

2007-01-23 12:34:24 · 1 answers · asked by Confucius 2

i searched everywhere but they only say that kepler stated that

2007-01-23 12:22:47 · 3 answers · asked by Anonymous

at this point, obviously scientist would now be able to destroy AND create matter. Ofcourse its impossible to go below absolute zero, but what if. What could we then do? Create or Destroy.

2007-01-23 12:15:33 · 5 answers · asked by Anonymous

2007-01-23 12:10:34 · 7 answers · asked by pmcm1994 1

Imagine you had a rubber band large enough to fit perfectly around the equator of the earth. If you found a second rubber band so it fit around the earths equator keeping a height of 1 foot above the ground at every point. How much longer would the second rubber band be than the first?

2007-01-23 12:00:28 · 6 answers · asked by Anonymous

I know that a(max) = w^2Xmax.

On one of my papers it says to get the answer by using the formula a(max) = (kA)/m.

Where does this formula come from? Are the similar ones for velocity and acceleration?

Any help is great! Final is tomorow!

2007-01-23 11:51:10 · 1 answers · asked by Anonymous

2007-01-23 11:08:16 · 9 answers · asked by 8 3

Please describe in layman terms the mechanisms behind cold fusion.

2007-01-23 11:03:14 · 6 answers · asked by Great Dane 4

Uhf antennas have short rods because they receive high frequency waves but is the relationship in terms of size, for example, are the rods half the wavelength?

Similarly for the older non UHF aerials which have a variety of lengths of horizontal bars.

2007-01-23 11:02:23 · 1 answers · asked by Deeb 1

Does a coin fall at the same rate as a feather when there is no air?

2007-01-23 10:43:36 · 14 answers · asked by JEAN S 1

subject?

2007-01-23 10:38:41 · 2 answers · asked by illdaretofly 2

whenever you use an inclined plane. is de(effort arm length) equal to dr(resistance arm length) or is de greater than dr, de is less than dr,or dr is zero?

2007-01-23 10:19:21 · 0 answers · asked by Justin D 1

2007-01-23 09:35:51 · 3 answers · asked by viktoria y 1

Can someone please explain to me what torque is and how to sum the torques... thanks!!!

2007-01-23 09:33:44 · 4 answers · asked by Kyle 4

I have a MRI image of a water bottle with air around it. The water is homogeneous. These are "modulus" scans. The air which should give a signal of zero (and noise) gives only positive values. Thus the noise itself seems to have a "signal" and noise. How do I calculate the SNR (signal to noise ratio) of the water? Thanks.

2007-01-23 09:32:06 · 1 answers · asked by Peter R 2

Assuming g=32.174 ft/sec/sec in a vacuum and no time given. i.e., what is Vf after distance, given V0 and a?

2007-01-23 09:21:10 · 4 answers · asked by Weekapaug12 1

in reference to Vedic mathematics

2007-01-23 09:10:17 · 3 answers · asked by Anonymous

Suppose there was a satellite orbiting earth and attached to this satellite is a thin, light string. This string reaches all the way down to just above the earth's surface. Could you swing on it? If you tried would you start pulling the satellite toward the earth? Would earth's gravity acting on the miles of string in the atmosphere pull the satellite in? What would happen?

2007-01-23 08:56:57 · 4 answers · asked by E 5

A world-class sprinter can reach a top speed (of about 11.5 m/s) in the first 15.0 m of a race. What is the average acceleration of this sprinter and how long does it take her to reach that speed?

***I know that average acceleration equals (V2-V1)/(T2-T1). The problem is a time isn't given and i have no clue where to start

Thanks much,
mono

2007-01-23 08:43:05 · 3 answers · asked by mono 1

2007-01-23 08:15:16 · 1 answers · asked by dv 1

2007-01-23 08:11:09 · 3 answers · asked by K 1

2007-01-23 07:53:08 · 1 answers · asked by Anonymous

If your in your car traveling at the speed of light will you be able to see your headlights in front of you? i would guess no, b/c i don't think your headlights would be traveling at twice the speed of light. am i right?

2007-01-23 07:40:33 · 5 answers · asked by Anonymous

I am only in 5th grade, so don't get mad at me for asking this question. Since molecules move faster and spread out when it is hotter, and we use ATOMic clocks, won't time move faster? And since the molecules move slower and contract when it is colder, shouldn't time slow down a little? Don't get mad at me for asking this preposterous question, but I was just wondering if that should, or does, happen. Please respond.

2007-01-23 07:32:17 · 10 answers · asked by Anonymous

2007-01-23 07:29:01 · 1 answers · asked by Steenskees 2