Question 6 (1 point) An object performing simple harmonic motion has an equation for the displacement from equilibrium x(t) = ((1.02x10^0) m) cos ((5.00x10^2)t + (9.1x10^0)) Calculate the frequency in Hz to 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 7 (1 point) A wave is described by the formula x(t) = ((1.600x10^-2) m) cos( (6.76x10^0)t- (6.8x10^0)x ) Assuming the wave number, k, and angular frequency, w, are in SI units, calculate the speed of the wave in m/s to 2 sf Hint: remember that v = fx Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 8 (1 point) A mass of (1.20x10^0) kg is attached to a horizontal spring with a spring constant of (8.0x10^2) N/m . At t = 0, the spring is pulled a distance (2.00x10^0) cm from the equilibrium position and released. Calculate the total mechanical energy of the spring in Joules to 2 s.f.. Assume there are no friction forces