After nitrogen and oxygen, the major constituent of the air is______________
Fill in the blank(s) with correct word
argon (Ar)
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Red giants are huge because their outer layers have expanded to a very low-density tenuous atmosphere.
Answer the following statement true (T) or false (F)
A resistor is connected to a battery with negligible internal resistance. If you replace the resistor with one that has quadruple the resistance, by what factor does the power dissipated in the circuit change?
a. 0.25 c. 2.0 b. 4.0 d. 0.50
A 5-turn square loop (10 cm along a side, resistance = 4.0 W) is placed in a magnetic field that makes an angle of 30° with the plane of the loop. The magnitude of this field varies with time according to B = 0.50t2, where t is measured in s and B in T. What is the induced current in the coil at t = 4.0 s?
a. 25 mA b. 5.0 mA c. 13 mA d. 43 mA e. 50 mA
Which of the following colors is scattered most readily by small particles in the air?
a. green c. yellow b. blue d. red