Recent content by student07

yeah I totally missed the subtracting a negative on the RHS that makes more sense now thank you

Hello Rain welcome to the forums, same issue is happening with me only thing is that I am going for the architecture career but this website has provided me and many others with a lot of help from the community, I'm glad you found it. You will too find it useful good luck in the future :)

I uploaded my question below; basically I am confused in part b) where they show that: 50 kgm/s = (5kg)v2 - (5kg)(-4m/s) then they say that 30 kgm/s = 5kg v2, but shouldn't it be 70 kgm/s = 5kg v2? As noted at the beginning of the question North is positive and thus since the cart moves south...

All thanks to you, thanks for not giving up on me lol you were very supportive :)

(43 / 120)^2 = 1-v^2 0.128402777 = 1 - v^2 v^2 = 1 - 0.128402777 v = 0.93 c

So then, √0.023333333 = √(1-V^2) - square root of 1 is 1 and V^2 remains right ? = 0.152752523 = (1-V^2) v^2 = (1 - 0.152752523) v^2 = 0.847247476 v = 0.92 c

I don't know any other way then this people got it this way https://answers.yahoo.com/question/index?qid=20120418090716AApo5pz but I don't get the gamma part...is ok is only a few marks thanks for your help

ok then 2.8 = 120√(1- V^2 ) 2.8 / 120 = √(1- V^2 ) 0.023333333 = √(1- V^2 ) √0.023333333 = (1-V^2) 0.152752523 = (1-V^2) v^2 = (1 - 0.152752523) v^2 = 0.847247476 v = 0.92 c is this correct now?

well 43 m = 120√(1- V^2 / C^2) then, 43 = 120√(1- V^2 ) - c^2 should be canceled like in part a) 43 = 120(1- V) - square root and ^2 should cancel each other 43 / 120 = (1-V) and finally v = 1 - (43/120) = 0.64 c since 0.64 is smaller than 0.70 c that's why I said before that it...

60√(1-0.49) = 42.85 = 43 m = 120√(1- V^2 / C^2) = 0.64 c is what I get now but shouldn't ship b be faster than ship A?

Since you are here can you also help me with this https://www.physicsforums.com/threads/spaceship-problem.816803/#post-5127239 thank you!

So 43 / 120 = 0.36 0.36 = 120√(1- V^2 / C^2) = 0.99 c I'm still thinking it should be, 120 / 43 = 2.8 2.8 = 120√(1- V^2 / C^2) = 0.98 c

Omg I am so dumb lol, 60 min = 3600s, 86400 s in a day, 2,592,000 s in 30 days thus, (3 x 10^9 W)(2,592,000 s) / (3 x 10^8 m/s) ^2 = 0.0864 kg

1 hr = 60 sec, 24 hr = 24 x 60 = 1440 s in a day, 1440 x 30 = 43200 s in 30 days thus, (3 x 10^9 W)(43200 s) / (3 x 10^8 m/s) ^2 = 1.44 x 10^-3 kg

Homework Statement A nuclear power generating station generates 3 x 10^9 W of power. How much mass does the plant convert into energy in one month (30 days)? Assume that the process is 100% efficient. 2. The attempt at a solution m = E / c^2, E = P x t m = (3 x 10^9 W)(30 days) / (3 x 10^8...