What do many physicists expect is required to explain why space is "flat" (i.e., that parallel lines stay parallel)?
a. A theory of everything.
b. Gravitational waves.
c. Dark matter.
d. The four forces.
e. Proton decay.
c
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Concerning our solar nebula theory, the presence of so many "hot Jupiters" gives us problems with how they can form that close to their star
Indicate whether the statement is true or false
An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms) is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?
a. 3.6 A (rms) b. 7.3 A (rms) c. 11.4 A (rms) d. 15.7 A (rms) e. 12.4 A (rms)
Transverse seismic body waves are known by the letter ______________
a. B b. P c. S d. T
The study of eclipsing binary star systems provides information about the radii of stars.
Answer the following statement true (T) or false (F)