- #1
lynn32
- 3
- 0
Hi, I have a few summer assignment questions, if someone could help me taht would be great.
1. What are the units of a unit vector?
-I think that a unit vector has no units or is the question talking about a different type of units. I'm just confused.
2.Evaluate the following definite integrals
5
ò x–1 dx= ln x +C
0
ln5 – ln0
ln(0) is undefined so I am unsure what to do from here on this problem.
3. Express in terms of ln 2 and ln 5:
(b) ln (1/4)
(d) ln (1/40)
I don’t know what to do with the fractions in this problem. I did this one with no problem.
ln(50)= ln2 + 2ln5
4. Two vectors A and B have precisely equal magnitudes. In order for the magnitude of A + B to be one hundred times larger than the magnitude of A – B, what must be the angle between them?
I really have no idea how to go about doing this problem. Maybe if someone could point me in the right direction or give me a hint about where to start I would be able to figure something out.
Thanks so much.
-Lynn
1. What are the units of a unit vector?
-I think that a unit vector has no units or is the question talking about a different type of units. I'm just confused.
2.Evaluate the following definite integrals
5
ò x–1 dx= ln x +C
0
ln5 – ln0
ln(0) is undefined so I am unsure what to do from here on this problem.
3. Express in terms of ln 2 and ln 5:
(b) ln (1/4)
(d) ln (1/40)
I don’t know what to do with the fractions in this problem. I did this one with no problem.
ln(50)= ln2 + 2ln5
4. Two vectors A and B have precisely equal magnitudes. In order for the magnitude of A + B to be one hundred times larger than the magnitude of A – B, what must be the angle between them?
I really have no idea how to go about doing this problem. Maybe if someone could point me in the right direction or give me a hint about where to start I would be able to figure something out.
Thanks so much.
-Lynn