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?

1. After collecting data, Ron determined that balance he was using was miscalibrated. What sort bias has he inadvertently introduced into the results? design bias measurement bias procedural bias 2.

Each day, Ted can wax 8 cars or wash 10 cars, and Tom can wax 3 cars or wash 5 cars. What is each man's opportunity cost of washing a car?

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value. if the speed of the water in the larger section of the pipe was 66 m/s, what is its speed in this smaller section?

A ball is thrown directly downward with an initial speed of 8.50 m/s, from a height of 29.7 m. After what time interval does it strike the ground?

Casimir recently purchased an old car. He notices the rims have some spots of rust on them. So, he goes to an automotive shop and chooses a product that is recommended for removing rust. Which acid is most likely to be found in the product?

1. Why does the water vapour in clouds condense? 2. Explain why you can see clouds but not see the water vapour in the air

What are some similarities between electricity and gravity?

What's the difference between solids and liquids?

According to the Theory of Continental Drift, what did the Earth's continents look like 255 million years ago?

What is the emf of a battery that increases the electric potential energy of 0.060 CC of charge by 0.70 JJ as it moves it from the negative to the positive terminal?