Name the chemical group most abundant in the rocks of Earth's crust
The feldspars form the most abundant group of rock forming minerals.
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Wire is wound on a square frame, 30 cm by 30 cm, to form a coil of 7 turns. The frame is mounted on a horizontal shaft through its center (perpendicular to the plane of the diagram), as shown in the figure
The coil is in clockwise rotation, with a period of 0.060 s. A uniform, horizontal, magnetic field of magnitude 0.40 T is present. At a given instant, the plane of the coil forms a 60° angle with the horizontal, as shown. At that instant, what is the magnitude of the emf induced in the coil? A) 13 V B) 23 V C) 2.1 V D) 3.6 V E) 26 V
Suppose you are observing a binary star with a telescope and are having difficulty resolving the two stars. You decide to use a colored filter to help you. Should you choose a blue filter or a red filter?
1.blue filter 2.red filter 3.neither because colored filters have no effect on resolution
This graph is made from measurements of the cosmic microwave background (dots) and a model based on the hypothesis of inflation. What does it show?
A) Measurements of the separation between regions of different temperature (in the cosmic microwave background) agree with predictions made by the hypothesis of inflation. B) It shows that the temperature of the cosmic microwave background is about 3 Kelvin. C) It shows that some regions of the early universe must have been hundreds of times as dense as others. D) It shows that the universe has no center and no edges.
Nuclear radiation can be detected by using a __________
Fill in the blank(s) with correct word