What are some methods humans have used to control flooding and what has been done to worsen the effects of flooding?

An air-filled pipe is found to have successive harmonics at 800 {/rm Hz}, 1120 {/rm Hz}, and 1440 {/rm Hz}. It is unknown whether harmonics below 800 {/rm Hz} and above 1440 {/rm Hz} exist in the pipe. What is the length of the pipe?

Which type of force can be in the same it opposite direction? A) normal B) gravitational C) unbalanced D) balanced

Does the ear drum vibrates when struck by sound waves and directly sends a message to the brain that is then recognized as sound?

A scientist reports the detection of an atomic particle known as a cosmic ray that came toward his experiment from outer space at a speed of 4 * 105 km / s-1.

23692U = 14456Ba + 89 36Kr + 3n is a a) fission reaction b) fusion traction c) alpha decay d) beta decay

The malfunction indicator light in an OBD II system is flashing. Technician A says that this simply indicates a soft failure. Technician B says this means the problem could be damaging the catalytic converter. Who is right? A. Technician A only B.

What are some methods humans have used to control flooding and what has been done to worsen the effects of flooding?

Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? a. It has no effect on the trajectory of the electron b.

Most of the mass of the Milky Way exists in the form of: a.) starsb.) gasc.) dustd.) dark matter

A 55kg cart is pushed by a force of 225 n. what is the carts acceleration?