Our Sun lies about the middle of the main sequence and the H-R diagram
Indicate whether the statement is true or false
TRUE
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Bohr's atomic theory predicted energy levels for hydrogen of En = (2 ?2 k2 e4m)/(hn)2. If instead we place 1 electron in "orbit" about a bare nucleus of atomic number Z, how do you expect Z to be incorporated into the En formula and why?
What will be an ideal response?
The galactic center lies in the direction of which constellation?
A) Orion B) Leo C) Taurus D) the Big Dipper E) Sagittarius
The circuit below shows three resistors in parallel. R3 > R2 > R1. The resistors are all made of the same wire with the same diameter but have different lengths. Rank the magnitudes of the electric fields in the resistors from least to greatest
a.
E3 < E2 < E1.
b.
E2 < E1 = E3.
c.
E1 = E2 = E3.
d.
E1 = E3 < E2.
e.
E1 < E2 < E3.
A miracle car with a 100% efficient engine burns fuel having a 40-megajoules-per-liter energy content. If air drag and overall frictional forces at highway speeds totals 1000 N, what distance per liter can be achieved on the highway?
A) 30 km B) 40 km C) 50 km D) more than 50 km E) need more information