If two stars are the same size and one is twice the temperature of the other, how much more luminous is the hotter one?
What will be an ideal response?
16 times
You might also like to view...
A heat pipe having an effective length of 80 cm uses methanol as the working fluid. At an operating temperature of 20ºC the methanol flow rate is 12 mg/s, and the heat pipe uses an axially grooved wick arrangement with 60 equally spaced 2.1-mm-deep grooves. Determine the width of the grooves.
What will be an ideal response?
The reaction forces at B (components By and Bz) for the space truss shown below are:
(A) By 5 211.6, Bz 5 23.5 kips
(B) By 5 11.6, Bz 5 223.5 kips
(C) By 5 223.5, Bz 5 11.6 kips
(D) By 5 23.5, Bz 5 211.6 kips
While gravity is always attractive, electromagnetic forces are always repulsive
Indicate whether the statement is true or false
Approximately how old are the erosion channels seen on the surface of Mars?
A) 3 billion years B) 4.6 billion years C) 1 billion years D) 500 million years