In the Eagle nebula a shock wave crashes into colder, dark gas. What does this cause?
a) formation of large amounts of dust made of carbon and silicon
b) causes no stars to form in the region for about 500,000 years
c) causes a reflection nebula
d) compression of gas and star formatione) destruction of all Bok globules
Ans: d) compression of gas and star formatione) destruction of all Bok globules
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Some type of solar eclipse will happen about:
A) every month at new moon. B) every week at full moon. C) every month at full moon. D) about every six months at new moon. E) every year at new moon.
A bullet is fired with a certain velocity at an angle ? above the horizontal at a location where g = 10.0 m/s2. The initial x- and y-components of its velocity are 86.6 m/s and 50.0 m/s respectively. What is the range of the bullet?
A) 500 m B) 1000 m C) 100 m D) 866 m E) 433 m
A jumper in the long-jump goes into the jump with a speed of 12 m/s at an angle of 20° above the horizontal. How far does the jumper jump?
A) 3.4 m B) 6.2 m C) 9.4 m D) 15 m E) 18 m
Which of the following could be the molecular formula for an alkene?
a. C9H9 b. C6H12 c. C9H17 d. C5H8 e. C2H6