The chromosphere of the sun
a. is hotter than the photosphere.
b. appears yellow-white in color during total solar eclipse.
c. is the visible surface of the sun.
d. produces an absorption spectrum.
e. all of the above
A
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Raising the temperature of air will
1.decrease the speed of sound in the air. 2.increase the speed of sound in the air. 3.not affect the speed of sound in the air. 4.sometimes increase and sometimes decrease the speed of sound in air.
In mountain regions, food cooked in boiling water cooks slower than when cooked at sea level. If the temperature beneath the pot of boiling water is increased, the food will cook
A) faster. B) slower still. C) both of these D) neither of these
Discuss what happens during the testing phase of a website.
What will be an ideal response?
What is the wavelength of a neutron having a kinetic energy of 0.025 eV? (The mass of a neutron is 1.67 × 10-27 kg.)
A) 3.7 × 10-22 m B) 2200 m C) 1100 m D) 1.8 × 10-10 m E) 3.2 × 10-20 m