I need help with these question from physics. I decided to take on an extra practice worksheet to study but I'm stuck. Please solve and explain the questions below. Everything is given in the attachments, thanks!!

The speed of sound at 0C is 331 m/s. If the speed of sound in air increases about 0.60 m/s for every 1C increase, what is the speed of sound when the temperature is 10C? Question 10 A simple pendulum with a period of 11.5 s has a length of E m. (Hint: Use gravitational field, 9 = 9.8 N/kg) Ocean waves are observed to have a length of 16 m from trough to trough. If 3 waves pass a fixed location every 12.0 5. What is the speed of the waves? A spring is stretched 0.12 m when some apples are suspended from it, as shown in the figure. What is the elastic potential energy of the spring, if the spring has a spring constant of 250 N/m? 3.2 N