help me with all please

Force of a spring Fs (N) Spring constant k (N/m) F = kx K = - x =- Fs Displacement (spring stretch) x (m) Period: Time of one oscillation T (S) time Mass T =- m (kg) oscillations Spring constant k (N/m) Length: Length of pendulum string L (m) Is= 20 T p = 2TEN- Gravity: Acceleration of gravity g (m/s2) Frequency: Oscillations per second f (Hz) oscillations time 1 = T 10. A pendulum with a length of 0.524 m is oscillating. What is its period of oscillation? A. 0.16 Hz B. 0.86 Hz C. 1.00 Hz D. 1.44 Hz 11. If a spring with a mass attached is replaced with another spring that has a greater spring constant, k , then the period of oscillation will A. increase the period B. decrease the period C. have no effect on the period 12. A spring has a spring constant of 40 N/m. How much force is needed to stretch the spring 0.20 m? A. 0.005 N B. 0.44 N C. 8 N D. 200 N 13. A force of 90 N is needed to stretch a spring 0.40 m. What is the spring constant? A. 0.0044 N/m B. 0.419 N/m C. 36 N/m D. 225 N/m 14. Increasing how far, x , a spring with a mass attached is stretched will A. increase the period B. decrease the period C. have no effect on the period 15. A spring with a spring constant of 12 N/m is attached to a 3.0 kg mass and then set in motion. What is the period of the resulting oscillation? A. 1.57 Hz B. 3.14 Hz C. 4.44Hz D. 25.1 Hz