A water wave with a wavelength of 35.6 cm approaches a wall with a large opening in it. The hole begins to close. What size does the hole in the wall need to be for the wave to noticeably diffract through the hole? Justify your answer.

Adoption process of the SI system by all the worlds nations is called

A phone cord is 3.50 m long. The cord has a mass of 0.200 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.750 s. What is the tension in the cord?

Two spheres look identical and have the same mass. However, one is hollow and the other is solid. Describe in detail an experiment you could conduct to determine which is which (say which has more rotational inertia for example and why)

The amount of energy needed to raise the temperature of a sample 1°C is called a. Heat capacity b. Specific heat capacity c. Calorie

Which of the following is a scalar quantity? A. 14 gallons B. 2 mph down C. 8 m/s^2 east D. 8 feet to the right

Scscientist ask questions and make observations what types of questions and observations would you make if you are scientist studying schools of fish in the ocean

4. Water is flowing at 12m/s in a horizontal pipe under a pressure of 600kpa radius 2cm. a. What is the speed of the water on the other side of 0.5cm radius? b. What is the pressure of the other side?

What caused the solar system to form a disk?

Under what circumstances can air resistance exercises ignored?

How does friction affect all moving objects?