24. What is the force of radiation pressure on a perfect absorber of area 160 m² when the electromagnetic flux of 1000W/m² travels in a direction perpendicular to the surface? (A) 2.61×10⁻⁴ N (B) 5.33×10⁻⁴ N (C) 5.12×10⁻⁴ N (D) 4.89×10⁻⁴ N (E) 5.01×10⁻⁴ N

2. The first stage of a Saturn V space vehicle consumes fuel and oxidizer at the rate of 1.50 × 10⁴ kg/s, with an exhaust speed of 2.60 × 10³ m/s. What is the acceleration of the vehicle just as it vertically lifts off the launch pad on the Earth if the vehicle's initial mass is 3.00 × 10⁶ kg? (A) 7.40 m/s² (B) 5.37 m/s² (C) 3.20 m/s² (D) 1.48 m/s² (E) None of the above is correct.

24. What is the force of radiation pressure on a perfect absorber of area 160 m² when the electromagnetic flux of 1000W/m² travels in a direction perpendicular to the surface?
(A) 2.61×10⁻⁴ N
(B) 5.33×10⁻⁴ N
(C) 5.12×10⁻⁴ N
(D) 4.89×10⁻⁴ N
(E) 5.01×10⁻⁴ N

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