Question: A laser beam 6.80 mm in diameter is incident on a plane surface at an angle of 62.0, as shown in Fig. 21.68. What is

A laser beam 6.80 mm in diameter is incident on a plane surface at an angle of 62.0°, as shown in Fig. 21.68. What is the elliptical area that the laser covers on the surface? (See Exercise 55.)

Fig. 21.68 62.0 6.80 mm

Data from Exercises 55

The ends of a horizontal tank 20.0 ft long are ellipses, which can be described by the equation 9x² + 20y² = 180, where x and y are measured in feet. The area of an ellipse is A = πab. Find the volume of the tank.

Fig. 21.68 62.0 6.80 mm

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