How can astronomers determine the mass of the Sun?
What will be an ideal response?
Using Newton's Laws, we know that gravity keeps the Earth in orbit around the Sun. Since the Earth's path is nearly circular, we can determine the size of the force keeping it on this path. Combining this equation (for centripetal force) with the gravity equation allows astronomers to calculate the Sun's mass.
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A trombone or a trumpet can be considered a(n)
A) open organ pipe. B) closed organ pipe.
The separation of red and blue light in single-lens telescopes is called ________ aberration
Fill in the blank(s) with correct word
If a 10-V battery, with negligible internal resistance, and a 15-? resistor are connected in series, what is the amount of electrical energy transformed to heat per coulomb of charge that flows through the circuit?
a. 0.67 J b. 1.5 J c. 10 J d. 150 J e. 25 J
A single slit of width 0.0300 mm is used to project a diffraction pattern of 500 nm light on a screen at a distance of 2.00 m from the slit. What angle does the central maximum subtend as measured from the slit?
a. 
b. 
c. 
d. 
e. 