In the early Universe the only two elements in existence were carbon and hydrogen.
a. true
b. false
b. False (The early Universe consisted entirely of the smallest atoms, principally hydrogen and helium, with traces of lithium, beryllium, and boron.)
You might also like to view...
Fiberscopes are based on the physical phenomena called
A) diffusion. B) dispersion. C) total internal reflection. D) absorption. E) polarization.
The maximum value of the electric field in an electromagnetic wave is 2.0 V/m. What is the maximum value of the magnetic field in that wave? (c = 3.0 × 108 m/s)
A) 6.7 pT B) 6.7 mT C) 6.7 nT D) 6.7 ?T E) 6.7 T
If two heaters are connected in parallel across the 120 volt source, the current drawn from the source is 10 amperes
Indicate whether the statement is true or false
In each cycle an engine gets 50. J from the combustion of fuel and it expels 45. J of heat to the environment at 13.°C. What is the minimum possible temperature at which the 50. J could be taken in?
A) 45°C B) 33°C C) 20°C D) 27°C E) 23°C