Group ______________A elements have two valence electrons
Fill in the blank(s) with correct word
2
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During a helium flash, what happens to the star? Does it get brighter? Why or why not?
What will be an ideal response?
At the highest point on the path of a projectile, its vertical acceleration
a. equals g pointing downwards. b. equals g pointing upwards. c. is zero. d. is undetermined. e. does not exist.
The index of refraction of diamond is 2.42. This means that a given frequency of light travels
A) 2.42 times faster in air than it does in diamond. B) 2.42 times faster in diamond than it does in air. C) 2.42 times faster in vacuum than it does in diamond. D) 2.42 times faster in diamond than it does in vacuum. E) 2.42 times faster in vacuum than it does in air.
A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 40 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory?