Cathode rays are
A. x-rays.
B. 
-rays.
C. electrons.
D. protons.
E. neutrons.
C. electrons.
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According to quantum mechanics, people should act like waves, too. The reason we do not exhibit wave properties is that our wavelengths are too small to observe. The reason the wavelengths of people are so small is that when finding the wavelength
A. Planck's constant is small and the mass of a person isn't very important. B. Planck's constant is small and people move slowly. C. Planck's constant is small and people masses are much larger than that. D. Planck's constant is small and people move very fast.
To tell the difference between a neutron star and a black hole in an X-ray binary, we must find the temperature of the object
Indicate whether the statement is true or false
A long solenoid (n = 1200 turns/m, radius = 2.0 cm) has a current of a 0.30 A in its winding. A long wire carrying a current of 20 A is parallel to and 1.0 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the solenoid?
a. 0.60 mT b. 0.85 mT c. 52 ?T d. 0.40 mT e. 0.75 mT
A soda-lime
