Question 3 (1 point) A train travelling at (5.860x1010) m/s is approaching a stationary observer, and sounding a warning horn at (4.2000x10^2) Hz. If the speed of sound is (3.13x10^2) m/s, calculate the frequency which the observer hears, in Hz to 3 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 4 (1 point) A wave has an equation of y(x,t) = (0.193 m) cos ( (8.20x10 3)t - (1.400x10*3)x ) Assuming all parameters are in SI units, calculate the propagation speed of the wave in m/s to 3 sf. Note: Your answer is assumed to be reduced to the highest power possible Your Answer: x10