A Newtonian reflector needs no secondary mirror
Indicate whether the statement is true or false
FALSE
Physics & Space Science
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What is the mass of air in a room that measures 5.0 m × 8.0 m × 3.0 m? (The density of air is 1/800 that of water)
Physics & Space Science
Salt water has greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force exerted on the boat by the water greater?
A) in salt water B) in fresh water C) The buoyant force is the same in both cases.
Physics & Space Science
Which is larger, a liter or a quart?
Physics & Space Science
The tropical year is shorter than the sidereal year because Earth's
a. orbit is an ellipse rather than a true circle. b. axis precesses westward. c. orbital speed is not constant. d. axis is tilted by 23.5°.
Physics & Space Science