If a object is placed between a convex lens and its focal point, the image formed is
A) real and inverted. B) real and upright.
C) virtual and upright. D) virtual and inverted.
C
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Each factor in the Drake Equation has a well-known, established value
Indicate whether the statement is true or false
A(n) _____________material has properties that are equal in three perpendicular directions.
Fill in the blank(s) with the appropriate word(s).
A soccer ball is released from rest at the top of a grassy incline. After 8.6 seconds, the ball travels 87 meters and 1.0 s after this, the ball reaches the bottom of the incline
(a) What was the magnitude of the ball's acceleration, assume it to be constant? (b) How long was the incline?
You are racing away from Earth in a super spaceship in which you can continually increase your speed. Which of the following best explains how people on Earth will perceive your speed?
A) They will know you are going very fast but will have no way of knowing whether you ever exceed the speed of light. B) You will see any beam of light from Earth coming toward you at the speed of light, which means it will catch you. Thus, the people on Earth must conclude that you are going slower than the speed of light. C) An imaginary spaceship can go as fast as it wants, so the folks on Earth soon will see you going faster than the speed of light. D) You may soon be racing away from Earth faster than the speed of light, but, if so, people on Earth will no longer be able to see you. E) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light.