What is the wavelength of light emitted when the electron in a hydrogen atom moves from the n=5 state to the n=2 state? give your answer in nm?

A. 1-kilogram ball rolls across the floor at a speed of 2 meters per second. Another. 1 kilogram ball rests on a shelf 1 meter above the floor. Which ball has more energy?

Which has the highest energy level? a. red waves b. orange waves c. blue waves d. radio waves

Which are negative impact that the internal combustion engine has had on society

The windchill index tells you A. how wind and temperature affect your body in winter. B. the temperature of the water during winter. C. how wind speed affects heating needs for structures. D. the amount of moisture in the air.

How does electrical conduction compare between metals, nonmetals, and metalloids

If an object-spring system is hung vertically and set into oscillation, why does the motion eventually stop?

What is the unit measurement for pain relief tablets and is it SI units Or English system?

Which best describes convection? It relies on the collision of particles within or between substances. It occurs in solids, liquids, or gases that are heated. It results when portions of a liquid cool and rise.

A 384 m long train is moving on a straight track with a speed of 77.3 km/h. The engineer applies the brakes at a crossing, and later the back of the last car passing the crossing with a speed of 19.5 km/h.

If a girl is standing in front of a smooth surface from which a sound is reflected the girl may hear