Saturn's rings are extremely old, possibly older than four billion years
Indicate whether the statement is true or false
FALSE
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Which of the following is most like the rotation of stars in the disk of the Milky Way?
A) a DVD in a player B) the planets in our solar system C) cars moving at a constant speed on a circular race track D) the hands of an analog clock E) the tire of a car moving
The potential outside a uniformly charged sphere is the same as if all the charge were concentrated at its center
Indicate whether the statement is true or false
What determines the smallest angular separation that two objects can have and, ideally, show up in a photograph as two separate objects?
a. How far away the objects are. b. The shutter speed of the camera. c. The size of the opening that lets the light into the camera lens and the wavelength of the light. d. Just the wavelength of the light. e. Just the size of the opening that lets in the light into the camera.
A lab student drops a 400.0-g piece of metal at 120.0°C into a cup containing 450.0 g of water at 15.0°C. After waiting for a few minutes, the student measures that the final temperature of the system is 40.0°C
What is the specific heat of the metal, assuming that no significant heat is exchanged with the surroundings or the cup? The specific heat of water is 4186 J/kg ? K. A) 1470 J/kg ? K B) 2830 J/kg ? K C) 3420 J/kg ? K D) 3780 J/kg ? K E) 4280 J/kg ? K