Jeff throws a ball straight up. For which situation is the vertical velocity zero?
a. on the way up
b. at the top
c. on the way back down
d. none of the above
b
Physics & Space Science
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Iron absorption lines that occur in the solar spectrum indicate that iron exists in the solar
A) atmosphere. B) surface. C) interior. D) none of the above
Physics & Space Science
A 6.0-? and a 12-? resistor are connected in parallel across an ideal 36-V battery. What power is dissipated by the 6.0-? resistor?
A) 48 W B) 220 W C) 490 W D) 24 W
Physics & Space Science
The Sun's life time is 10 billion years. About how long is the lifetime of a star with a star has a mass of 0.1 MSun and a luminosity of 0.01 LSun?
A) 1 billion years B) 100 million years C) 100 billion years D) 10 million years
Physics & Space Science
X-ray telescope mirrors are very similar to optical telescope mirrors
Indicate whether the statement is true or false
Physics & Space Science