An image seen projected on a screen by a single lens
a. is always erect
b. is always inverted
c. is a real image
d. is a virtual image
e. none of the above
B, C
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Galaxy A and galaxy B formed at the same time. Galaxy A is much farther from us than galaxy B. Which of the following is true?
A) Galaxy A will appear younger to us than galaxy B. B) Galaxy A will appear older to us than galaxy B. C) Galaxy A will appear to be the same age as galaxy B.
A diverging lens is thicker at the center than the edges
a. True b. False Indicate whether the statement is true or false
Suppose that a steel bridge, 1000 m long, were built without any expansion joints. Suppose that only one end of the bridge was held fixed
What would the difference in the length of the bridge be between winter and summer, taking a typical winter temperature as 0°C, and a typical summer temperature as 40°C? The coefficient of thermal expansion of steel is 10.5 × 10-6K-1. A) 0.42 m B) 0.11 mm C) 0.11 m D) 0.42 mm E) 0.37 cm
The symbol indicating the number of protons in a nucleus is N
Indicate whether the statement is true or false