It currently appears that within this universe we have mostly

A day at the north pole of Uranus lasts:

A) about 7 hours. B) about 8 hours. C) about 21 years. D) about 42 years. E) about 84 years.

In the two-slit experiment, for the condition of bright fringes, the value of m = +4 corresponds to a path difference of

A) 4? B) 3? C) 2? D) ? E) (1/2)?

The initial rise off the main sequence in stage 8 comes from gravitational energy of the contracting helium core

Indicate whether the statement is true or false

Two 3-? resistors are connected in series. Another 3-? resistor is then connected in parallel to the two already in series. The resulting combination has what resistance?

1. 1 ? 2. 2 ? 3. 4 ? 4. 5 ?