As a mercury atom absorbs a photon of

energy, an electron in the atom changes from

energy level d to energy level e.

Determine the energy of the absorbed photon in

electronvolts.

How much time (in seconds does it take light to travel 1.20 billion km?

The body mass index (BMI) is a measure of relative size commonly used to assess how much one's body weight differs from what is healthy or desirable. BMI = mass / (height) 2 in SI units. What is the BMI of a 67.

Choose a time period from history. Which one of the four solstice/equinoxes would have been the most important to this time period? Why?

A car moves in a straight line at a speed of 64.0 km/h. How long will it take the car to move 0.25 km at this speed?

Which takes place as water cycles from the bottom of the pot toward the top? A. Thermal energy is transferred. B. Water molecules gain kinetic energy. C. Chemical energy is transferred. D. Water molecules gain thermal energy.

Why should scientists write reports and give oral presentations of the steps and results of their in investigations?

Which of these rocks are formed by volcanic activity? select the two correct answers. a. marble b. basalt c. limestone d. granite e. sandstone

Which source is most likely an authority on the subject? Dr. Vale, a pediatrician, discusses electrical circuitry on her home-improvement website. Jonah, an amateur cook, teaches his son how to make the best grilled cheese sandwiches.

What methods can be used to break down substances into elements

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.