Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
if you were to travel to a star 50 light years from earth at a speed of 2.0 X 10 to 8th power m/s, what would you measure this distance to be?
 one year ago
 one year ago
if you were to travel to a star 50 light years from earth at a speed of 2.0 X 10 to 8th power m/s, what would you measure this distance to be?
 one year ago
 one year ago

This Question is Open

calculusfunctionsBest ResponseYou've already chosen the best response.2
@shortcake1970 do you know the definition of a light year?
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
A light year is the distance that light travels in one Earth year.
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
light travels at 3*10^8 m/s
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Yes that's approximately the speed of light, as @VeritasVosLiberabit said.
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
so it seems the 2*10^8 is meant to throw you off because it is irrelevant to finding the distance
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
and the distance light travels in a year is 9.47 X 10^15 i have that much
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Now find the number of seconds in one Earth year. Yes @VeritasVosLiberabit , that is extraneous information. Not needed.
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
it might be better to keep your calculations in MKS units unless told otherwise.
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Alright @shortcake1970 now simply multiply that answer by 50.
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
so do I just multiply?
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Haha that's what I said.
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
oops yup you just answered that
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Need help with anything else or are you okay?
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
well I do have another questions I might need help with let me write it...
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Are these questions you've tried yourself? It's important you try them yourself first.
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
a beam of a certain type of elementary particle travels at a speed of 2.8 X 10^8 m/s. at this speed the average lifetime is measured to be 2.5 X 10^8 s. what is the particle's lifetime at rest. let me tell you what formula i was thinking of using
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
once i know which formula i can work it out myself :)
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Sorry I was away for a minute. Just give me second. I'm just in the middle of something.
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
ok i'm having a hard time typing the formula
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
delta t=delta t o /square root of 1v^2/c^2
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
OK I'm back. Yes\[\Delta t =\frac{ \Delta t _{0} }{ \sqrt{1\frac{ v ^{2} }{ c ^{2} }} }\]
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Do you understand? \[\Delta t = 2.5\times10^{8}s\]\[v =2.8\times10^{8}m/s\]\[c =3.0\times10^{8}m/s\]\[\Delta t _{0}=?\]Rearrange the formula first to get\[\Delta t _{0}=\Delta t \sqrt{1\frac{ v ^{2} }{ c ^{2} }}\]
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Give me a second to calculate it.
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
is the answer for the previous question 4.73 x 10^17?
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
It should be\[9.0\times10^{9}\]
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
That exponent is negative 9
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Do you? Did you spot your error?
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
yes i spotted the error
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
Great. I have to go but is there anything else before I do?
 one year ago

calculusfunctionsBest ResponseYou've already chosen the best response.2
I guess not. I might be back a little later. Bye.
 one year ago

shortcake1970Best ResponseYou've already chosen the best response.1
thank you so much.
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.