What is the energy difference between the second excited state and first excited state of an electron in the "box" of size L=1nm? A) 1.9 eV B) 1.1 eV C) 0.6 eV D) 0.3 eV E) 0.2 eV

Which feature of the sun is a section that is cooler than its surroundings? Corona Prominence Solar flare Sunspot

Why a control is needed in a valid experiment

Using the free-body diagram, calculate the net force acting on the sled. Is the sled in a state of dynamic equilibrium?

Whose view was that the Cosmos was based on the belief that every occurrence in the physical universe had logos behind it and that is where life originated?

Current can flow uphill in a: A) resistor B) battery C) light bulb D) flowing water conduit

What is the simplest relationship between the angular wavenumber k and just one of the other kinematic variables? Express your answer using only one of the other kinematic variables plus constants like π.

The pilot of an airplane notes that the compass indicates heading west. The airplane's speed relative to the air is 100 km/h. The air is moving in a wind at 25.0 km/h toward the north.

How do you get a resultant factor? A. Add two or more vectors B. Add two scalars C. Multiply two scalars D. Multiply two vectors

A panpipe is made of five pipes. The longest pipe is 25 centimeters long and the shortest is 5 centimeters long. Which of these pipe produces the highest-frequency sound and why?

Model rocket A is launched at an angle of 70° above the x axis, with an initial velocity of 40 m/s. An identical rocket B is launched under the same conditions at an angle of 90° above the x axis, also with an initial velocity of 40 m/s.