In the velocity selector shown in Active Figure 29.13, electrons with speed v 5 E/B follow a straight path. Electrons moving significantly faster than this speed through the same selector will move along what kind of path?
4
Physics & Space Science
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Snell's Law: A light ray in air strikes a glass plate whose index of refraction is 1.42. Some of the light reflects off the surface of the plate, but most of it enters the glass. If the angle of refraction is one-half the angle of reflection, the angle of refraction is closest to which one of the following angles?
A. 45° B. 43° C. 41° D. 39° E. 37°
Physics & Space Science
Which of the following is not an energy unit?
A. N·m B. calorie C. Joule D. kWh E. Watt
Physics & Space Science
Which of the following statements is true of the angles of incidence and reflection?
a. They are not related b. They can never be equal c. They are always equal d. They add to 90°.
Physics & Space Science
A temperature change from 15°C to 45°C corresponds to what incremental change in °F?
a. 54 c. 36 b. 40 d. 313
Physics & Space Science