How many basic units does the SI system have?
A)
three
B)
four
C)
five
D)
seven
E)
ten
D
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General Relativity: Suppose a 70-kg student were to be compressed to form a black hole. What would be the Schwarzschild radius of this black hole? (G = 6.67 × 10-11 N ? m2/kg2, c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
Which terrestrial world has the strongest magnetic field?
A) Mars B) Earth C) the Moon D) Venus E) Mercury
Doubling the distance between two objects halves the gravitational force between them
Indicate whether the statement is true or false
A student finds a blank liquid bulb thermometer and calibrates the scale by placing it in ice water and placing a reference mark at the level of the fluid
The student places the thermometer in boiling water and finds that the fluid level is 12.0 cm above the reference mark. What is the temperature when the fluid level is 2.4 cm above the reference mark? A) 2.4°C B) 24°C C) 25°C D) 28°C E) 20°C