The mass of a supermassive black hole thought to power a quasar is typically
A) 3 solar masses.
B) 10 solar masses.
C) 1 trillion solar masses.
D) 1 billion solar masses.
D) 1 billion solar masses.
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According to Einstein's theory,
A) there are no limitations on the speed of any object. B) no material object can be accelerated up to lightspeed. C) material objects get easier to accelerate as they move faster. D) nothing can move at lightspeed. E) material objects become less massive as they go faster and faster.
What are the standard units for apparent brightness?
A) watts B) joules C) Newtons D) watts per second E) watts per square meter
The greater the number of carbon atoms in a compound, the greater its heat of combustion
What will be an ideal response?
Electrical forces between charges are strongest when the charges are
a. far apart b. close together c. the electrical force is constant everywhere