# Search results

1. ### Still trouble with time dilation

I would need the distance from the moon to the Earth which is 3.84*10^8 m and t=L/v=3.84*10^8/1.12*10^4=3.44*10^4 s. Then to find t', I would use t'=t/gamma and subtract t' from t? But then, I still end up with 3.44*10^4 s, which is t.
2. ### Still trouble with time dilation

Ok, (v/c)^2/2= 6.96889e-10, so the answer to my problem is 1+6.96889e-10
3. ### Still trouble with time dilation

When I use v/c, I get 1 because v is so much smaller than c. Is that the answer; the same as Earth's frame?
4. ### Still trouble with time dilation

Someone please help. I've gotten no sleep because of this problem. I just don't see/ understand what to do at this point in the problem.
5. ### Still trouble with time dilation

Where does the 6.86*10^-10 come from? Wouldn't I use 1+(v^2)/2=1+25,000^2/2=3.12*10^8.
6. ### Still trouble with time dilation

I converted c=3e8 m/s to c=6.711e8 mi/h and when I put that into the equation, I get 1. Because I was getting 1, I looked at the class notes from this morning and saw that the professor omitted c and just used sqrt(1-(v^2)). When I do that, I get the negative obviously because v^2 is greater...
7. ### Still trouble with time dilation

Homework Statement The Apollo astronauts returned from the moon under the Earth's gravitational force and reached speeds almost 25,000 mi/h WRT Earth. Assuming (incorrectly) they had this speed for the entire trip from the moon to Earth, what was the time difference for the trip between...
8. ### Time Dilation and gravity

From the wording of the question, it looks like it only wants the distance from the Moon to the Earth. That is the problem that I am having. According to my calculator, I have two choices. I can take it to be 1 or the square root of a negative number, which is what is messing me up.
9. ### Time Dilation and gravity

The way I have it set up, the time dilation factor is less than 1, am I doing something wrong?
10. ### Time Dilation and gravity

Homework Statement The Apollo astronauts returned from the moon under the Earth's gravitational force and reached speeds almost 25,000 mi/h WRT Earth. Assuming (incorrectly) they had this speed for the entire trip from the moon to Earth, what was the time difference for the trip between...
11. ### Midpoint Rule Confusion

Homework Statement I'm working on a practice test and got stuck on the question: Approximate the length of the curve y=√x, 0≤x≤1 by the midpoint rule with n=4 and ∆x=0.25. Homework Equations Is the midpoint rule the same thing as Simpson's rule? I don't remember going over the midpoint...
12. ### Find the volume of a frustum of a right circular cone

Find the volume of a frustum of a right circular cone with height h, lower base radius R, and top radius r. I don't want the answer. I want to know how to do this. My math teacher gave all of these problems for the class to do, but didn't explain anything. Are there equations that I can...
13. ### Specific heat of alloys

thank you so much!
14. ### Specific heat of alloys

I have an alloy and found the average specific heat of the metal to be 289 J/kg°C. I need to know what type of metal it is. I've looked at several different tables of specific heats, but can't find what I'm looking for. Can anyone help me?
15. ### Physics I'm thinking about going into physics. What are career opportunities?

Right now I am a year away from a BA in business, but I don't know if that's what I want to do for the rest of my life. I need something more challenging. Thanks for all of the ideas.
16. ### Physics I'm thinking about going into physics. What are career opportunities?

I wasn't to specific on purpose. I don't know what area interests me the most so right now I'm obviously just going through the basics.
17. ### Physics I'm thinking about going into physics. What are career opportunities?

I'm thinking about going into physics, but I was wondering what kind of careers will physics lead me to.