Ch 231 Quiz
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Ch 231 Quiz
1. In "Relativity Country" the conductor in a train traveling with 13.13 x107 km/hr aims the beam of a flashlight in the direction of the train motion. What is the speed of the light beam relative to ground in m/s (sheet 3)? Indicate with a positive (negative) sign whether the result would be different (the same) if the flashlight would be pointed in the opposite direction.
= 3E8 (negative)
= 3E8 (negative)
User X Guest
# 2
2. A particle travels with 16.92 % of the speed of light past you. It has a clock attached to it which is identical to the clock you carry. You choose to ignore Special Relativity and claim the 2 clocks will show the same time. What is the magnitude of the percentage error you make (sheet 5 top,6. Give the magnitude of the difference of the relativistic factor from 1.00, multiplied by 100 ) ? Indicate with a positive (negative) sign whether the percentage error decreases (increases) with increasing speed of the particle.
=still working on # 2
=still working on # 2
User X Guest
# 3
3. A radioactive particle has a lifetime of 1.3 x108 s before it decays (dies) after its creation when observed at rest. The particle has a velocity of 2.674 x108 m/s relative to you standing in the laboratory. What is the lifetime of the particle as measured by you (sheet 6, ? Indicate with a positive (negative) sign whether the liftime measured by you when "riding on the particle" is smaller (larger) than your result.
= 1.3E8/(sqrt(1(2.674E8/3E8)^2)) (answer is positive)
= 1.3E8/(sqrt(1(2.674E8/3E8)^2)) (answer is positive)
User X Guest
# 4
4. The lifetime of a hypothetical radioactive particle passing you with a speed of 0.9974 c, where c is the speed of light, is determined by you to be 4.933 x105 seconds. What is the "proper" lifetime of the particle (the time measured when it is at rest with respect to the observer) (sheet 6,9) ? Indicate with a positive (negative) sign whether the "proper lifetime" is (not) the one you measure when "riding on the particle".
=4.933E5 * (sqrt(1(.9974)^2) (answer is positive)
=4.933E5 * (sqrt(1(.9974)^2) (answer is positive)
User X Guest
# 2
if anyone can help with # 2....
i cant seem to figure out what i'm doing wrong on that one
i cant seem to figure out what i'm doing wrong on that one
User X Guest
Question #2
100*(1(sqrt(1((value provided/100)^2))))
Answer is negative.
Thank you, User X, for the remainder of the problems.
Answer is negative.
Thank you, User X, for the remainder of the problems.
helping Guest
Question 3
You're getting a nonreal answer because you're not using parentheses correctly.
(1.3E/(sqrt(1[(...E8)/(3E8)]^2)))
Now regardless of doing this, I'm still getting a wrong answer. Though, you do get a "real" answer
Can someone please comment on this....
thanks
(1.3E/(sqrt(1[(...E8)/(3E8)]^2)))
Now regardless of doing this, I'm still getting a wrong answer. Though, you do get a "real" answer
Can someone please comment on this....
thanks
guest222 Guest
#3
Hey....i'm not sure exactly what your doing wrong but the answer above that User X posted does work...
phyfrk Guest
#3
i think you might need to just check your parenthesis
other than that i think your work itself might be fine
and try to double check your numbers, maybe you entered something wrong on your calc?
other than that i think your work itself might be fine
and try to double check your numbers, maybe you entered something wrong on your calc?
phyfrk Guest
#3
your best bet for #3 is to do the equation in parts..thats the only way it worked for me..putting the whole thing into ur calculator is most likely gonna give u the wrong answer bc theres too much room for error..so try that
guest_01 Guest
#3 sucksssss
help! still cannot get it right! what was ur numerical answer for #3? i've tried so many times!
A radioactive particle has a lifetime of 3.603 x108 s before it decays (dies) after its creation when observed at rest. The particle has a velocity of 2.734 x108 m/s relative to you standing in the laboratory. What is the lifetime of the particle as measured by you (sheet 6, ? Indicate with a positive (negative) sign whether the liftime measured by you when "riding on the particle" is smaller (larger) than your result.
A radioactive particle has a lifetime of 3.603 x108 s before it decays (dies) after its creation when observed at rest. The particle has a velocity of 2.734 x108 m/s relative to you standing in the laboratory. What is the lifetime of the particle as measured by you (sheet 6, ? Indicate with a positive (negative) sign whether the liftime measured by you when "riding on the particle" is smaller (larger) than your result.
k8 Guest
Re: Ch 231 Quiz
the only way you get a nonreal number is if you used the first number in placement of the second number
in respo Guest
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