An automobile with tires that have a radius of 0.260 m travels 76000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?

An airplane has a mass of 2*10^6 kg and air flows past the power surface of the wings at 100ms¯¹. If the wings have a surface area of 1200m², how fast must the air flow over the upper surface of the wing if the plane is to stay in the air?

What wave-like property of light causes it to bend when encountering an opening? A. Reflection B. all the above c. Refraction d. none of the above e. diffraction

Which structures protect the cell? Check all that apply. - cell wall - cell membrane - mitochondrion - nucleus - ribosome - Golgi body

Which of these types of rock can undergo metamorphism? Select all that apply. A. igneous B. sedimentary C. metamorphic

Two long, parallel wires are separated by a distance of 3.20 cm. The force per unit length that each wire exerts on the other is 3.30*10-5 N/m, and the wires repel each other. The current in one wire is 0.560 A. a.

Explain the difference between texture and composition.

Marie and Calvin dissolved 10 grams of KNO3 in 100 grams of water at 25oC. Next they added 5 grams more.

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. It strikes a red glider that has mass 0.600 kg and that is initially at rest.

f a wave has a wavelength of 9 meters and a period of 0.006, what is the velocity of the wave? A. 1,200 m/s B. 1,500 m/s C. 1,800 m/s D. 1,285 m/s

Using your own words, what is Net Force? What general statement can you make about the relationship between net force and how fast an object changes it's speed?