dont need to show work just answer

Question 11 (1 point) A tennis ball of mass 56g moving at (-1.900x10^1) # m/s is struck by a force (2.3x10^2) a N for a time of (1.560x10*1) milliseconds. Calculate the final velocity of the tennis ball in m/s. You do not need to enter a unit vector or units in your answer. +X Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 AnswerQuestion 12 (1 point) A sprinter runs 100.0 metres in (1.03x10^1) seconds. Assuming she starts at rest, calculate the magnitude of her average acceleration. Give your answer in m/s to 3 significant figures Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 13 (1 point) You mix (2.000x10^2) cm of liquid 1, with a density of (1.15x10^0) g/cm3, and (1.0x10^2) cm of liquid 2, with a density of (8.600x10^-1) g/cm . Calculate the average density in kg/m to 2 sf. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 AnswerQuestion 14 (1 point) A travelling wave moving along a string has an equation of y(x,t) = (5.000x10^-3) cos ( (2.81x10^3)x -(7.0600x10^2)t ) Assuming all parameters are in SI units, calculate how far the wave propagates along the x-axis in (1.0000x10^2) seconds. Calculate your answer in metres to 3.0 significant figures Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 15 (1 point) A mass of (5.5x10^2) g is hanging underneath a spring which has an unknown spring constant. The period of oscillation is (1.50x10^0) seconds. Find the spring constant in N/m. Give your answer to 2 s.f. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 AnswerQuestion 9 (1 point) Calculate the average power (in watts) required to move a truck of mass (2.500x10^4) kg from rest, to a final speed of (5.2x10^0) m/s in a time of (2.15x10^1) seconds. Assume no non-conservative forces act. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 10 (1 point) A starship is acted on by two external forces F1 = (4.330x10^7) 3 N, and F2 = - (1.850x10^7) 3 +(2.6x10^7) y N. Calculate the magnitude of the net force exerted on the starship in newtons, to 2 sf. F1 F2