A string of length 50cm and mass 10kg vibrate in 3 loops. if the tension in the string is 20N. determine the frequency of the vibration.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.

You add 800 ml of water at 20c to 800 ml of water at 80c what is the most likely final temperature of the mixture ? a. 100c b. 60c c. 25 c d.50c