How do we know how old the Sun is?
A) from radiometric dating of solar system meteorites
B) from Newton's version of Kepler's third law and the orbits of the planets
C) from calculating its fuel supply and how fast it is using it up
D) from its speed and distance from us
E) from radiometric dating of particles in the solar wind
A) from radiometric dating of solar system meteorites
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How can you tell whether a sugar solution is saturated or not?
A) Add more sugar, if it dissolves, it is saturated. B) There will be a precipitate if the water is heated. C) Cool the solution to see if there is a precipitate. D) As long as there are more water molecules than sugar molecules, there is a saturated solution.
A lens that is thicker at the center than the edges
a. is a converging lens b. is a diverging lens c. always forms a real image d. always forms a virtual image e. none of the above
An object that has zero resistance is a semiconductor
a. True b. False Indicate whether the statement is true or false
How are frequency and period related in simple harmonic motion?:
a) They are directly related b) They are inversely related c) Their sum is constant d) Both measure the number of cycles per unit of time