The mass of the Milky Way galaxy is a few ____

a. million solar masses
b. hundreds of millions of solar masses
c. billion solar masses
d. hundreds of billions of solar masses
e. trillion solar masses


d

Physics & Space Science

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A particle is in the second excited state of a one-dimensional box of length 1.0 m. What is its momentum (in kg × m/s)?

a. 6.6 × 10^-34 b. 3.3 × 10^-34 c. 9.9 × 10^-34 d. 13 × 10^-34 e. cannot be solved unless mass of particle is known

Physics & Space Science

What temperature exists inside a solar collector (effective collection area of 15 m2 ) on a bright sunny day when the outside temperature is +20.°C?

Assume that the collector is thermally insulated, that the sun irradiates the collector with a power per unit area of 600 W/m2, and that the collector acts as a perfect black body. A) 107°C B) 154°C C) 93°C D) 73°C E) 33°C

Physics & Space Science

What is the threshold energy for production of a pair of muons, each of mass 207 mo?

What will be an ideal response?

Physics & Space Science

A place where an unusually hot part of the mantle rises through the crust causing volcanic activity is called

A. Divergent boundary B. Hot spot C. Convergent boundary D. Transform boundary

Physics & Space Science