Set up appropriate equations and solve the given stated problems. All numbers are accurate to at least two significant digits.

A beam of light travels from the source to a water tank and then through the tank in 1.67 ×10⁻⁸ s . The total distance from the light source to the back of the tank is 4.50 m. If the speed of light in air is 3.00 × 10⁸ m/s, and in water is 2.25 × 10⁸ m/s, how far does the beam travel through the water tank (neglect the glass walls)? See Fig. 6.6

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4.50 m Fig. 6.6