On June 21, the noonday Sun is overhead at what latitude?
a. 0°
b. 23.5°N
c. 23.5°S
d. That of the Tropic of Cancer
b
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A(n) ____________ is a description of some natural phenomenon that can't be right or wrong. It is merely a convenient way to think about a natural phenomenon
a. hypothesis b. paradigm c. natural law d. model e. theory
Once carbon is formed in massive star cores, the majority of nuclei formed form then on will belong to even numbered elements, due to addition to more helium nuclei as alpha particles
Indicate whether the statement is true or false
The acceleration of gravity on the Moon's surface is about 1/6 of that on the Earth's surface. An object on the Earth is to be taken to the Moon. We can state that, compared to the Earth,
A. the object's mass and weight will be the same on the Moon. B. the object's mass and weight will be less on the Moon. C. the object's mass will be less but the weight will be the same on the Moon. D. the object's mass will be the same but the weight will be less on the Moon.
If the number of turns on the secondary coil of a transformer are less than those on the primary, the result is a
A) step-down transformer. B) step-up transformer. C) 120-V transformer. D) 220-V transformer. E) a dc transformer.