Galileo was the first to observe the phases of ________.
A. Venus
B. Earth
C. the moon
D. the sun
Answer: A
Physics & Space Science
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A convex spherical mirror with a focal length of magnitude 25 cm has a 4.0-cm tall flower placed 100 cm in front of it. What is the height of the image of the flower?
A) 0.80 cm B) 20 cm C) 4.0 cm D) 1.6 cm E) 8.0 cm
Physics & Space Science
How many nuclear reactions occur in a proton-proton chain?
a. two b. three c. one d. four e. five
Physics & Space Science
The strong nuclear force acts only on neutral particles
Indicate whether the statement is true or false
Physics & Space Science
An object is placed 10 cm in front of a diverging lens of focal length -15 cm. The image will be located
A. 6.0 cm behind the lens. B. 0.167 cm in front of the lens. C. 6.0 cm in front of the lens. D. 3.0 cm behind the lens. E. 3.0 cm in front of the lens.
Physics & Space Science