What force must the people overcome in order to lift the rock? (rock on one end and two guys on the other end)

Calculate the fundamental frequency of a 4 meter organ pipe that is open at both ends. assume that the temperature is 20◦c and the speed of the sound is 344 m/s. answer in units of hz.

What is an astronomical unit (AU) ?

Goal programming: a. Is not an iterative solution procedure. b. Requires the use of only hard constraints. c. Involves solving problems containing a collection of goals that we would like to achieve. d. Requires firm RHS values of the constraints.

During a hard sneeze, your eyes might shut for 0.50 s. If you are driving a car at 90 km/h during such a sneeze, how far does the car move during that time?

18. In a solid conductor such as a metal, what is the cause of an electric current? A. A flow of positive and negative charges. B. A flow of positive charges only. C. + A flow of negative charges only. D. A flow of protons. E. A flow of neutrons.

A student in her physics lab measures the standing-wave modes of a tube. The lowest frequency that makes a resonance is 20 Hz. As the frequency is increased, the next resonance is at 60 Hz. What will be the next resonance after this? A. 80 Hz B.

For a satellite to stay in orbit around Earth, it has to be moving forward very fast all the time. What force will make it fall to Earth if it goes too slowly?

A student hangs a balloon from a string then rubs it on their hair and releases it. They rub a second balloon on their hair then move it towards the hanging balloon the moving balloon moves away because ...

Plato and the Soul. A. Plato believed that our souls died with our physical bodies. B. Plato believes our souls were the shadows on the cave walls. C. Plato believed our souls did not exist.

A 1000 kg satellite and a 2000 kg satellite follow exactly the same orbit around the earth. What is the ratio F1/F2 of the gravitational force on the first satellite to that on the second satellite?