What is the mass of 2 moles of carbon dioxide?
a. 88 g b. 80 g
c. 64 g d. 56 g
a
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In blackbody radiation, the energy is radiated uniformly in every region of the spectrum, so the radiating body appears black in color
Indicate whether the statement is true or false
A watch dial that continues to glow after a week in the dark is almost certainly
A) fluorescent. B) phosphorescent. C) polarized. D) radioactive.
When a charged particle is moving in a static uniform magnetic field
A) there will always be a magnetic force exerted on it, regardless of its direction of motion. B) there may be a magnetic force exerted on it which will cause its speed to change. C) there may be a magnetic force exerted on it, but its speed will not change. D) there may be a magnetic force exerted on it, but its direction of motion will not change. E) None of the above statements are true.
Two long straight wires carry currents perpendicular to the xy plane. One carries a current of 50 A and passes through the point x = 5.0 cm on the x axis. The second wire has a current of 80 A and passes through the point y = 4.0 cm on the y axis. What is the magnitude of the resulting magnetic field at the origin?
a. 200 ?T b. 600 ?T c. 450 ?T d. 300 ?T e. 400 ?T