Order the interior layers of the Sun from the hottest to the coldest
A) radiation zone, core, convection zone, photosphere
B) photosphere, convection zone, core, radiation zone
C) core, radiation zone, convection zone, photosphere
D) photosphere, convection zone, radiation zone, core
C
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Stellar spectra tell us that ________ is the second most abundant element in the Sun
A) carbon B) helium C) iron D) hydrogen E) oxygen
A long, vertical, metallic wire carries downward electric current. What is the direction of the magnetic field it creates at a point 2 cm horizontally east of the center of the wire?
1.north 2.south 3.east 4.west 5.up
An insulator has a positive electric charge of 8 × 10^ -17 C. How many electrons were added or removed?
a. 500 electrons removed b. 20 electrons removed c. 500 electrons added d. 20 electrons added
You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is
a. 2 kg b. 4 kg c. 8 kg d. 16 kg e. 6 kg