The carbon-nitrogen-oxygen cycle
a. operates at a slightly lower temperature than the proton-proton chain.
b. is most efficient in star less massive than the Sun.
c. occurs when carbon and oxygen combine to form nitrogen, which produces energy.
d. produces the energy responsible for bipolar flows.
e. combines four hydrogen nuclei to form one helium nucleus, which produces energy.
e
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Buoyancy: A piece of aluminum with a mass of 1.0 kg and density of 2700 kg/m3 is suspended from a light cord and then completely immersed in a container of water having density 1000 kg/m3.(a) Determine the volume of the piece of aluminum.(b) Determine the tension in the cord when the aluminum is immersed in the container of water.
What will be an ideal response?
The only way to make sound travel faster in air is to change the air's ____________
Fill in the blank(s) with correct word
In an AC circuit, the ratio of average current to maximum current is:
a. zero. b. 0.5. c. 0.707. d. 1.0.
An electric car runs off a battery. When the driver wants to slow down the car, instead of applying the brakes he or she throws a switch that connects the wheels to a generator that converts the car’s kinetic energy back to energy in the battery.
A. first kind B. second kind