According to the simple de Broglie model, how many wavelengths are there in an electron wave in the first orbit? In the second orbit? In the nth orbit?

Which of the following processes start with a material that is in a fluid or semifluid state and solidifies the material in a cavity (two best answers) : a. pressing b. forging c. casting d. machining e. turning f. molding

How does Kepler's first law refine the Copernican model?

A 1200-kg car accelerates it's speed from 4 m/s to 10 m/s in 3 seconds. Find the car average speed, the car acceleration, the distance traveled by, & the net force on car

When a muscle is stretching by a contraction of the opposing muscle it is called

Which of the following statements incorrectly describes a scenario where the source of the sound waves and the person hearing the sound are remaining stationary? A. The frequency of the sound waves is not affected by the nature of the medium. B.

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?

Which of the following is an example of potential rather than kinetic energy? a. water rushing over Niagara Falls b. a molecule of glucose c. a crawling beetle foraging for food d. light flashes emitted by a firefly

If a force of 15 newtons [N] is applied to a surface and the pressure is measured as 4,000 pascals [Pa], what is the area of the surface in units of square milimeters [mm2 ]?

An engineer has the task of producing an aluminum alloy with a density of 3.0 grams per cubic centimeter. She comes up with the perfect alloy and saves a sample of it. Which mass and volume measurements correspond to this sample? 7 g and 2.

What must be your car's average speed in order to travel 235km in 3.25 hours?