Describe two sources from which minerals can crystallize
What will be an ideal response?
Answer: Minerals crystallize from 1) magma—molten rock from Earth's interior, and from 2) water solutions—a) hydrothermal activity in the later stages of crystallization from a magma, and b) precipitation of minerals from chemical sediments.
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During an annular eclipse of the Sun, the corona of the Sun is visible
a. True b. False Indicate whether the statement is true or false
A wheel of moment of inertia of 5.00 kg-m2 starts from rest and accelerates under a constant torque of 3.00 N-m for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?
A) 57.6 J B) 122.0 J C) 91.9 J D) 64.0 J E) 78.8 J
A coil lies flat on a horizontal tabletop in a region where the magnetic field points straight down. The magnetic field disappears suddenly
When viewed from above, what is the direction of the induced current in this coil as the field disappears? A) counterclockwise B) clockwise C) clockwise initially, then counterclockwise before stopping D) There is no induced current in this coil.
Capacitor #1 has parallel plates of length L and width W, plate separation d, and is filled with dielectric with constant K.Capacitor #2 has parallel plates of length 2L and width 2W, plate separation 2d, and is filled with dielectric with constant 2k. If a voltage V is applied to capacitor #1 and a voltage 2V is applied to capacitor #2, which capacitor stores more energy and by what factor?
a. Capacitor #2 by a factor of 8 b. Capacitor #2 by a factor of 16 c. Capacitor #1 by a factor of 4 d. Both capacitors store the same energy.