sound waves

A very large pipe is set up in a science museum. It is open at both ends, and it is large enough to walk inside it. A large loud speaker is set up at one end of the pipe. A student walks along the pipe and makes the following observations. While walking through the entire length of the pipe the student encountered 3 soft zones. A) What should the student call these positions? (Draw this arrangement if posible on the computer) b) They are spaced 2.5m apart and there are 3 of them in the entire length. How long is the pipe? C) Determine the wave length of the wave? D) Determine the frequency produced by the loud speaker? (Answers + Simple working only required)

Proper Units

What amount of heat is required to change 10 grams of Ice at -10 degrees Celsius into steam at 120 degrees Celsius?

Physics Problems Kinematics, Acceleration

Show all steps in computation. 1) A VW RAbbit can go from rest to 80.5 km/h (50.0 mi/h) in a modest 8.20 s. How long will it take to speed from 48.3 km/h to 64.4 km/h, along a straight run, if the average acceleration is the same as before? 2)During a takeoff a small plane has an average tangential acceleration of 5.0 m/s^2 and travels for 20 s before becoming airborne. What is the initial speed of the plane? How long must the runway be? 3)While making a movie a cowboy on a horse rides up to a moving train traveling at 5.0 km/h along a straight length of track. After running next to the last car for a while he charges ahead toward the engine 100 m away and gets there in 1.10 min. A... click for more

Rotational Equilibrium and Rotational Dynamics (problem sounds easy)

I'll attach a picture of the problem The sailor in Figure P8.10 weighs 750N. The force F1 exerted by the wind on the sail is horizontal and acts through point B. The weight of the boat is 1250N and acts through point O, which is 0.8m from the point A along the line OA. The force F2 exerted by the water acts through point A. Determine the net force exerted by the wind on the sail.

Physics Problems

Show all steps: What is the vertical component of the force the man exerts on the box? The man has his right foot on the top corner of the box at 53.1 degrees from the y axis, his left foot is stationary on the ground; the box is 400N. Newtons?_____ direction?______ 1)What is the horizontal component of the force exerted by the box on the man? Newtons?______ Direction?_____ What is the static friction force exerted on the box? Newtons?______ direction?_______ Given that his back foot doesn't move what is the friction force exerted on that foot? Newtons?_________ direction?_______ 2) If a nonzero constant net horizontal force is acting on a body sitting at rest on a fr... click for more