What is the magnitude of the free-fall acceleration at a point that is a distance 2R above the surface of the Earth, where R is the radius of the Earth?
a. 4.8 m/s2
b. 1.1 m/s2
c. 3.3 m/s2
d. 2.5 m/s2
e. 6.5 m/s2
b
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During the Carboniferous Period,
A) the carbon dioxide cycle started to operate for the first time B) carbon-rich meteorites impacted the Earth C) the first carbon-based life appeared D) land was covered with dense forests with the appearance of the first insects and amphibians
A radioactive isotope of atomic number Z emits an alpha particle, and the daughter nucleus then emits a beta-minus particle. What is the atomic number of the resulting nucleus?
A) Z -1 B) Z + 1 C) Z - 2 D) Z - 3
The singularity of a black hole is where general relativity predicts the density to become infinite
Indicate whether the statement is true or false
A 1.5-H inductor is connected in series with a 200-? resistor through an ideal 15-V dc power supply and an open switch. After closing the, what is the maximum energy that will be contained in the inductor?
A) 3.2 mJ B) 1.2 mJ C) 5.2 mJ D) 2.2 mJ E) 4.2 mJ