Physics - June 2007

So I invent a space ship (with no windows) that can travel at 0.9999c. I aim it right towards the sun and take off. Assuming I can steer out of the way before I hit the sun, I would still be dead from the intense radiation poisoning from the visible light that was likely blue-shifted into the gamma-ray spectrum, right? Since gamma rays can penetrate metal objects, the fact that the spaceship had no windows doesn't help me.

But in the frame of reference of someone on earth, how would you explain how the normal, visible light from the sun caused me to die, since they would not have seen gamma rays entering my spaceship from their stationary reference frame?

2007-06-03 19:27:53 · 3 answers · asked by figaro1912 3

According to theory of relativity a body moving with speed of light has infinite mass.

Again light is composed of particles called photons which has minute but definite mass.

How do one account for this contradiction?

2007-06-03 19:04:57 · 9 answers · asked by Karoly 2

Am I a bad ***?

2007-06-03 18:59:51 · 3 answers · asked by ghghghgh g 1

If a bullet is fired at from a shoulder height at 4 m, totally parralel to the ground, then how long will it take for it to hit the ground?

It's the same thing as dropping a bullet from 4m high so there are no obstacles in front of the bullet.

Please show your working out and don't do it if you don't know how.

2007-06-03 18:44:29 · 5 answers · asked by worried person 1

I was given v=f(wavelength) and E=hf
one of the problems gives:
wavelength: 10^2m/s - 10^4m/s
energy: 10^-26J - 10^-27J

i used v=f(wavelength) to get 3.0*10^6Hz - 3.0*10^4Hz
If i use teh other equation, I get a completely different answer....
am i doing osmething wrong?

2007-06-03 18:42:16 · 2 answers · asked by billf39 2

1)An object is placed 72 cm away from a glass surface of a container having water. At what point will the object appear from the glass?

2)What is the fractional change in wavelength of light when it passes through water from glass?

2007-06-03 18:36:38 · 1 answers · asked by Akilesh - Internet Undertaker 7

Im not sure what to do but the index of refraction of air is 1 and for glycerin its 1.473

2007-06-03 18:21:10 · 1 answers · asked by J39P 1

what is the reason in terms of physics....

2007-06-03 18:14:08 · 7 answers · asked by Meh... 3

2007-06-03 18:13:05 · 3 answers · asked by bleah 1

64 meters?

2007-06-03 18:01:44 · 4 answers · asked by Anonymous

directions. the relative velocity of light of one w.r.t. other. the ans is "C". Plz explain it

2007-06-03 17:04:17 · 2 answers · asked by emmy 2

2007-06-03 16:16:54 · 6 answers · asked by Anonymous

Wee bit of help please.. =D I suck at Physics. MY answer was 126+46=172/2=86, but its WRONG! WHY?!

You plan a car trip on which you want to average 86 km/h. You cover the first half of the distance at an average speed of only 46 km/h. What must your average speed be in the second half of the trip to meet your goal? Note that the velocities are based on half the distance, not half the time.

2007-06-03 15:26:09 · 5 answers · asked by movin2thabeeet 1

Now really, it should be impossible for a blackbody to be completely white right, because the dropoff on the blue side is steeper than the dropoff on the red side.

So there's no way to equally stimulate all three cones at once -- (other than saturating them, which is kindof cheating)

Anyway, there still must be a closest.

What temperature would be closest to white ?

I think it's somewher between Sun temperature and D65

2007-06-03 15:00:54 · 3 answers · asked by anonymous 4

Stumped...

An 835 N sled is pulled a distance of 200 m. The task requires 1.20 x 10^4 J of work and is done by pulling on a rope with a force of 125 N. At what angle is the rope held?

2007-06-03 14:45:22 · 3 answers · asked by movin2thabeeet 1

2007-06-03 14:43:07 · 5 answers · asked by Anonymous

A solenoid is 15cm long and has 250 turns. What is the magnetic field strength inside the solenoid if the current in the coils is 3.8A?

Please show explanation and if it helps, the answer is 8.0 x10^-3 T

2007-06-03 14:36:08 · 1 answers · asked by Anonymous

2007-06-03 14:32:06 · 6 answers · asked by silly07leo 1

As a science fair project, you want to launch an 850 g model rocket straight up and hit a horizontally moving target as it passes 31 m above the launch point. The rocket engine provides a constant thrust of 15.0 N. The target is approaching at a speed of 15 m/s. At what horizontal distance between the target and the rocket should you launch?


I was trying to use some of the kinematic equations to figure this one out, but I'm always missing some part to the problem or at least that's what I'm thinking. Got any ideas?

2007-06-03 13:47:18 · 4 answers · asked by Kat 1

help me please, i dont even really get the question lol

2007-06-03 13:42:43 · 2 answers · asked by Ganbatteru 3

How can one increase the magnetic force in a solenoid?

2007-06-03 13:35:28 · 5 answers · asked by DJS 2

A sailboat is traveling east at 6.0 m/s. A sudden gust of wind gives the boat an acceleration = (0.75 m/s2, 40° north of east). What are the boat's speed and direction 6.0 s later when the gust subsides?


I tried doing vf=vi + a delta t, but evidently that doesn't work. And I thought since the direction became 40 degrees, that's how it would stay, but that didn't work either. Any ideas?

2007-06-03 12:55:24 · 4 answers · asked by Kat 1

thanks

2007-06-03 12:55:05 · 4 answers · asked by Ganbatteru 3

if an object attracted by another object actually has no force exerted on itself but is an 'illusion' from the space around it being bent like gravity, why do the newtonian laws of motion seem to fit this phenomenon?

2007-06-03 12:31:38 · 2 answers · asked by mrzwink 7

2007-06-03 11:59:15 · 3 answers · asked by Mr. M 1

A hot air ballon is open at the bottom

2007-06-03 11:39:59 · 9 answers · asked by fooshizzle ma nizzle 1

thats what i have written down but im not so sure....

2007-06-03 11:22:24 · 2 answers · asked by system error 2

HEy whats a constant used in calculating friction?

2007-06-03 11:06:23 · 2 answers · asked by Anonymous

A car braking system supplies a constant force. calculate the work required to change the speed from 30 m/s to 25 m/s. Calculate the work required to change the speed from 15 m/s to 0 m/s. Compare the distances of travel for each situation. (Hint: make a ratio of the first case to the second case)



In the first problem, if the car went from 30 m/s to 0 m/s, then what is the comparison now to 15 m/s to 0 m/s?



If you could please show the work too, it might help me understand it a little better and I can compare my work to see where I am messing up. thank you

2007-06-03 10:59:11 · 1 answers · asked by Anonymous

2007-06-03 10:59:01 · 4 answers · asked by bowl114 1