8 Questions
| Attempts: 164

Questions and Answers

- 1.(a) Is it possible for two quantities to have the same dimensions but different units? (b) Is it possible for two quantities to have the same units but in different dimensions?
- A.
(a) Yes. (b) No

- B.
(a) Yes. (b) Yes

- C.
(a) No (b) Yes

- D.
(a) No. (b) No

- 2.You can always add two numbers that have the same units (such as 6 meters + 3 meters). Can you always add two numbers that have the same dimensions, such as two numbers that have the dimensions of length [L]?
- A.
True

- B.
False

- 3.The following table lists four variables, along with their units: Variable Units x Meters (m) v Meters per second (m/s) t Seconds (s) a Meters per second squared (m/s2) These variables appear in the following equations, along with a few numbers that have no units. In which of the equations are the units on the left side of the equals sign consistent with the units on the right side?
- A.
- B.
- C.
- D.
- E.
- F.

- 4.In the equation you wish to determine the integer value (1 2 etc.) of the exponent n. The dimensions of y a and t are known. it is also known that c has no dimensions. Can dimensional analysis be used to determine n?
- A.
Yes

- B.
No

- 5.Which of the following statements, if any, involves a vector?
- A.
I walked 2 miles along the beach.

- B.
I walked 2 miles due north along the beach.

- C.
I jumped off a cliff and hit the water traveling at 17 miles per hour.

- D.
I jumped off a cliff and hit the water traveling straight down at a speed of 17 miles per hour.

- E.
My bank account shows a negative balance of -25 dollars.

- 6.Two vectors are added together to give a resultant vector. The magnitudes are 3 m and 8 m, respectively, but the vectors can have any orientation. What are (a) the maximum possible value and (b) the minimum possible value for the magnitude of?
- A.
(a) 11 m

- B.
(a) 15 m

- C.
(b) 5 m

- D.
(b) 3 m

- 7.Can two nonzero perpendicular vectors be added together so their sum is zero?
- A.
Yes

- B.
No

- 8.Can three or more vectors with unequal magnitudes be added together so their sum is zero?
- A.
Yes

- B.
No

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