Name the dependent and independent variables in Procedure 2
The area is the dependent variable. The radius is the independent variable.
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What do we mean when we say that the rotation curve for a spiral galaxy is "flat"?
A) Gas clouds orbiting far from the galactic center have approximately the same orbital speed as gas clouds located further inward. B) The amount of light emitted by stars at different distances is about the same throughout the galaxy. C) All the galaxy's mass is concentrated in its flat, gaseous disk. D) The disk of a spiral galaxy is quite flat rather than spherical like the halo.
If the current drawn from a 12-volt car battery is 100 amperes when it is short circuited with a wire, the resistance of the wire is 0.12 ohms
a. True b. False Indicate whether the statement is true or false
A wooden block contains some nails so that its density is exactly equal to that of water. If it is placed in a tank of water and released from rest when it is completely submerged, it will
A) rise to the surface. B) sink to the bottom. C) remain where it is released.
Two sounds of the same intensity are added together. The intensity of the resulting sound is how many decibels greater than the intensity of one of the original sounds? The resulting sound
1.will have twice the decibel level as one of the original sounds. 2.will have the same decibel level as one of the original sounds. 3.will be two decibels higher than the original sound. 4.will be three decibels higher than the original sound.