Enormous filaments of excited gas arching over the Sun's surface and extending hundreds of thousand of kilometers outward are called
a. sunspots.
b. solar flares.
c. prominences.
d. coronal arcs.
c
You might also like to view...
Which publication was Kepler's masterpiece, providing strong evidence to planetary motion and a heliocentric Universe?
a. Alfonsine Tables b. De Revolutionibus c. Rudolphine Tables d. The Prutenic Tables e. Sidereus Nuncius
Ideal Gas Law: Two containers of equal volume each hold samples of the same ideal gas. Container A has twice as many molecules as container B. If the gas pressure is the same in the two containers, the correct statement regarding the absolute temperatures TA and TB in containers A and B, respectively, is
A. TA = TB.
B. TA = 2TB.
C. TA = 
TB.
D. TA = 
TB.
E. TA = 
TB.
The side of a cube is increased by 5%. The percentage increase of the surface area of the cube is
A. 5%. B. 10%. C. 12%. D. 16%. E. 18%.
Two identical springs with spring constant 50 N/m support a 5.0-N weight as in the picture below. What is the tension in spring A?
?
?
A. 1.45 N B. 2.50 N C. 2.89 N D. 3.75 N E. 5.00 N