The luminosity of a star is the ____
a. total energy radiated by the star at 100 parsecs
b. total energy radiated by the star
c. total energy radiated by the star in one second
d. average energy radiated by the star in one month
e. average energy radiated by the star in one year
c
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________ are star-like objects that contain less than 0.08 solar masses and will never raise their core temperatures high enough that the proton-proton chain can begin. Other minor fusion reactions do occur in these objects. They fall in a gap between the low-mass M dwarf stars and the massive planets in which nuclear fusion never occurs
a. Brown dwarfs b. Herbig-Haro objects c. Bok globules d. T-Tauri star e. Main-sequence stars
In a Voigt solid with an elastic modulus of 1 GPa, if a stress of 1 MPa is applied for a long time and then removed for a long time, the total strain is equal to _________.
Fill in the blank(s) with the appropriate word(s).
A 10.00-V battery is connected between two parallel metal plates 4.00 mm apart. What is the magnitude of the electric field between the plates?
a. 2.50 × 10^3 N/C b. 25.0 N/C c. 14.0 N/C d. 4.00 × 10^?6 N/C e. 2.90 × 10^3 N/C
Absorption lines in the spectra of supergiant stars are broader than the same spectral lines in main sequence stars of the same spectral type
Indicate whether the statement is true or false