Cometary impacts with Jupiter
A) are impossible to observe from Earth.
B) are spectacular but do not teach us much.
C) have been observed from Earth at least twice.
D) are extremely rare.
E) would not be catastrophic if they happened on Earth.
C
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A compound microscope consists of an objective lens of focal length f0 and an eyepiece that by itself produces an angular magnification 25.0
The microscope is designed so that the object to be viewed is on the left side of the objective lens and is focused in a plane that is 28.00 cm away from the right-hand (or inside) focal point of the objective lens. When properly adjusted, the eyepiece and the objective lens are 29.90 cm apart. The eyepiece magnification is based on an image at infinity and a near point at 25.0 cm. What is f0?
Venus is most like Earth in terms of size
a. True b. False Indicate whether the statement is true or false
Special relativity predicts that moving clocks run slow
a. True b. False Indicate whether the statement is true or false
Theory predicts that neutron stars may not exceed 3 solar masses
Indicate whether the statement is true or false