You are standing at the North Pole. Which way is Polaris, the North star?
A) The answer depends on what time of day (or night) it is.
B) The answer depends on whether it's winter or summer.
C) directly overhead
D) 30 degrees up, due West
E) on the northern horizon
C) directly overhead
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Addition by 1. Components: The figure shows three vectors, src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q36g6.jpg" style="vertical-align: -5.0px;" />.
, 
, and 
, along with their magnitudes. Determine the magnitude and direction of the vector given by 
+ 
- 
Fill in the blank(s) with the appropriate word(s).
If a flea can jump up to 45 cm above its initial resting point, with what speed is it able to leave the ground when jumping?
A. 2.1 m/s B. 3.0 m/s C. 8.8 m/s D. 4.2 m/s
Which of the following normally warms up fastest when heat is applied?
A) water B) iron C) glass D) wood E) all of the above
Vision Problems: The near point of a farsighted person is 100 cm. She places reading glasses very close to her eyes, and with them she can comfortably read a book at a distance of 25 cm. What is the power of the lenses in her reading glasses?
A. +2.5 diopters B. +3.0 diopters C. +3.2 diopters D. -2.0 diopters