The dominant trigger of star formation in our Galaxy is supernova explosions
Indicate whether the statement is true or false
False
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An electric toaster operating on 120 volts draws a current of 6 amperes. The resistance of the toaster is __________
Fill in the blank(s) with correct word
Optics of the Eye: A person's eye lens is 2.8 cm from the retina, and his near point is at 25 cm. What must be the focal length of his eye lens so that an object at the far point of the eye will focus on the retina?
A. -2.8 cm B. 2.8 cm C. -2.4 cm D. 2.4 cm E. 2.2 cm
A car decelerates uniformly and comes to a stop after 10 s. The car's average velocity during deceleration was 50 km/h. What was the car's deceleration while slowing down?
A) 10 km/h-s B) 5 km/h-s C) 9.8 m/s2 D) 8 km/h-s E) 4 km/h-s
Some young star clusters contain large numbers of protostars
a. True b. False Indicate whether the statement is true or false