When an atom is in excited state emits a photon of radiation, the energy of the photon is equal to the?

What is the most abundant element in the universe? A. helium B. hydrogen C. carbon

What happens when an object is dropped? A. Its velocity at 2 seconds is 19.6 m/s. B. Its velocity at 2 seconds is 9.8 m/s. C. Its velocity at 2 seconds is 20 km/h. D. Its velocity at 2 seconds is 22 mph.

Choose the false statement regarding resistance. A) Longer wires have less resistance. B) Electrical resistance produces heat. C) Resistance slows the flow of current. D) The larger the diameter of the wire, the less resistance.

Find the volume of a box with length 25 cm, height 25 cm and width 1.0 m.

How many bones are in a human body

If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because?

What are the relationships of the different types of matter, mass, and the change in the average kinetic energy of particles?

A steamboat moves with velocity components of 6 km/hr along the x direction and 8 km/hr along the y direction. what is the direction of the steamboat with respect to the x axis?

What are 3 ways scientists can take to reduce bias?

A water heater is operated by solar power. If the solar collector has an area of 6.39 m2, and the intensity delivered by sunlight is 550 W/m2, how long does it take to increase the temperature of 1.00 m3 of water from 19.4∘C to 72.1 ∘C?