Answer:
An electron tube from which all air has been removed. The vacuum ensures transparency inside the tube for electric fields and moving electrons. Most electron tubes are vacuum tubes; cathode-ray tubes, which include television picture tubes and other video display tubes, are the most widely used vacuum tubes
Explanation:
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<span>Newton's 1st Law of Motion is also known as the Law of. ... Newton's 2nd Law says that when an is applied to a it causes it to Newton's 2nd Law says that when an UNBALANCED FORCE is applied to a MASS, it causes it to ACCELERATE. The greater the force that is applied, the the acceleration.</span>
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