An ideal transformer has 60. turns on its primary coil and 300. turns on its secondary coil. If 120. V at 2.0 A is applied to the primary, what voltage and current are present in the secondary?
What will be an ideal response?
0.60 kV; 0.40 A
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Magnesium has 12 protons. How many electrons are in its first energy level?
a. 2 b. 4 c. 6 d. 8 e. 10
Which of the following describes a major similarity between Titan and Earth?
A) Both have nearly identical atmospheric compositions of nitrogen and oxygen. B) Both have features of erosion due to a liquid, except on Titan it is liquid methane and ethane rather than liquid water. C) Both have many active volcanoes erupting with molten rock, except the rock is higher density on Titan. D) The two worlds have very similar surface temperatures and surface compositions.
Ultraviolet light has wavelengths that are ________ visible wavelengths.
A. the same energy as B. slower than C. shorter than D. faster than E. longer than
The human eye can just detect green light of wavelength 500. nm, which arrives at the retina at the rate of 2 × 10-18 W. How many photons arrive each second?
What will be an ideal response?