Consider the wave equation y=10sin(7(x−50t))y =10\sin(7(x-50t))y=10sin(7(x−50t)). What does the number 10 in the equation represent?
Acceleration
Speed
Amplitude
Wavelength
Cathode rays are
High energy electromagnetic waves
Protons
Neutrons
Streams electrons
In a discharge tube, most of the gas is pumped out so that electricity is conducted at
Steady voltage.
High pressure
Low pressure
Low voltage
Which of the following electromagnetic waves is most energetic?
Radio waves
X-ray
Gamma rays
Ultra-violet rays
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