A person has a near point of 40 cm and a far point of 1.0 m. When looking through lenses of focal length –1.0 m, what is the nearest an object can be to be seen clearly?
a. 29 cm
b. 67 cm
c. 134 cm
d. 140 cm
e. 68 cm
b
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The outflow channels on Mars indicate a flood period in the history of Mars. During this time, based on the width and depth of the remaining riverbed, it is thought that the flow rate must have been:
A) just a small trickle, barely more than a stream of water. B) moderate, about the flow rate of the Ohio River. C) fairly large, about the flow rate of the current Colorado River. D) significantly large, about the flow rate of the Amazon River. E) enormous, as much as 100 times the flow rate of the Amazon River.
When you sit by a campfire, by what method of heat transfer are you primarily being warmed?
What will be an ideal response?
The splitting of a large nucleus into two smaller nuclei upon absorbing a neutron is nuclear fusion
a. True b. False Indicate whether the statement is true or false
Recall the raisin cake model of the universe and its analogy to our expanding universe. Suppose you measure the recession velocity (the speed at which any object is moving away from us) of Galaxy A to be 2000 km/s and the recession velocity of Galaxy B to be 6000 km/s. What can you conclude about the relative distances of these two galaxies?
A) Galaxy A is 3 times as far from us as Galaxy B. B) Galaxy B is 3 times as far from us as Galaxy A. C) Galaxy A is 6 times as far from us as Galaxy B. D) Galaxy B is 6 times as far from us as Galaxy A. E) The relative distances cannot be determined from the information in this problem.