Which of the following statements about our Sun is not true?
A) The Sun's diameter is about 5 times that of Earth.
B) The Sun is a star.
C) The Sun contains more than 98% of all the mass in our solar system.
D) The Sun is made mostly of hydrogen and helium.
A) The Sun's diameter is about 5 times that of Earth.
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If a white dwarf gains enough mass from a nearby star to exceed its Chandrasekhar limit it will become a nova
Indicate whether the statement is true or false
A 35-mm digital camera using a standard 50.0 mm lens is focused on a 1.80 m tall person who is standing 3.25 m from the lens. You now refocus the camera on a 15.0 cm tall flower that is 75.0 cm from the lens
(a) In refocusing, by how much did you move the lens? Did you move it toward the film or away from it? (b) What is the height of the flower's image on the CCD sensor?
Magazine paper is shiny because it is coated with clay. Why would it be wise to separate magazines from newspapers?
What will be an ideal response?
For the first excited state (n=2) of the particle in a box of width L, what is the uncertainty in momentum?
a. 
b. 
c. 
d. 