Physics calculation- does anyone understand the solution to this question?
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Physics calculation- speed of a moving star--? The yellow line emitted by the helium discharge tube in the laboratory has a wavelenght of 587 nm. The same yellow line in the helium spectrum of a star has a wavelenght of 590 nm. What can you deduce about the motion of the star? Calculate the speed of the moving star. (speed of light= 3.00 x 10^8 m s^-1) This is the official solution but I dont follow it!! any explanations?? thanks :) Sorry cant put the solution here but heres the link :) http://www...
Answer:
Without looking at the answer: It changed because of doppler effect. The fact that the wavelength became...
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I am a preparing for IIT JEE 2016..almost half the year has passed and I have still not settled to the routine I should have.I have wasted a lot of time.I am feeling that half the year has passed and I am where I was at the beginning.okay there has been...
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Oww Oww Oww, Firstly cool down dear... !! :) . I've liked your question a lot . ( not because of the...
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Answer:
Use the kinematics equation: vf^2=vi^2+2*a*d vi=0, solve for vf When he hits the water his velocity...
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Two charged particles attract each other with a force of magnitude F. If the charge of one is tripled and the distance separating the particles in increased by a factor of 6, the force acting on each of the two particles has what magnitude? a) F/8 b...
Answer:
F=kq1q2/r^2 plug the numbers in and with a little algebra: F=k*3q1q2/(36*r^2)=[kq1q2/r^2]*1/12 b) F...
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okk.. A ball thrown up vertically returns to the thrower after 6 secs. Find 1. the veolocity with which the ball was thrown up 2. the maximum height the ball reached 3. its position after 4 secs. i didnt attend school for 3 days, so i was not able to...
Answer:
If thrown up vertically, the ball will slow down the same way as it is speeding up when it comes down...
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Did you take more then 2 languages in high school? Do you like stress on the importance of it, and is it really helping you today? Im in high school and its hurting me a lot more then it s helping me. I wanna drop my Spanish 2 class and get an pre engineering...
Answer:
I can only answer from the standpoint of a professional engineer. A second language is not a requirement...
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Proposed 3 line law can reduce poverty, corruption, MNC domination in 4 months(A four page version of this chapter written for easy distribution is athttp://rahulmehta.com/001.pdf . and Chap-3 of this book has more details on this proposed 3 line law...
Answer:
I applaud the detail and thought you have put into this proposal. A few thoughts came to mind when reading...
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I have found a contradiction in my physics, and I need help understanding why I made this mistake. (For simplicity purposes I will only state the part of the question I have trouble with, not the entire question). Question 1 is: A block with a mass m...
Answer:
Question 1. normal force of the block on the sloping path = mg cos theta, whether frictions acts or...
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Can anyone help me solve and understand these questions? I just need to check my answers so I can review for my test tomorrow. Your help would be much appreciated! (: 1) What is the pH of a 0.001 M HCl solution using the equation of ionization of HCI...
Answer:
We us the log formula located on you calculator = -log( insert M ) = pH 1. -log(0.001) = 3. Therefore...
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