Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
and 
, what is the direction of the vector 
?
A. ?49°
B. ?41°
C. ?90°
D. +49°
E. +21°
Answer: B
You might also like to view...
Consider three galaxies, Alpha, Beta and Gamma. An observer in Beta sees the other two galaxies each moving away from him in opposite directions at speed 0.70c. At what speed would an observer in Alpha see the galaxy Beta moving?
A) 0.82c B) 0.70c C) 0.94c D) 0.35c E) 0.57c
Energy Conservation With Nonconservative Forces: On a planet where g = 10.0 m/s2 and air resistance is negligible, a sled is at rest on a rough inclined hill rising at 30° as shown in the figure. The object is allowed to move and it stops on a rough horizontal surface, at a distance of 4.0 m from the bottom of the hill. The coefficient of kinetic friction on the hill is 0.40. What is the coefficient of kinetic friction between the horizontal surface and the sled?
A. 0.10 B. 0.20 C. 0.31 D. 0.40 E. 0.60
The larger the value of Hubble's constant, the more rapid the expansion of the universe and hence the younger the universe
Indicate whether the statement is true or false
The softest mineral on the Mohs hardness scale is named ______________
Fill in the blank(s) with correct word