Calculate the energy needed to heat 4 kg of water from 25°C to 45°C.

heat =

80 Kcal

100 Kcal

180 Kcal

280 Kcal

How are heat and light waves produced on and in the sun?

What is blochemistry?

The equilibrium constant for a given reaction ... Group of answer choices always increases with temperature. increases with temperature for endothermic reactions only. does not change with temperature.

5. What is the speed of a wave that has a frequency of 600 Hz and a wavelength of 2 m? Show the steps you used to solve this problem.

Some lakes, such as the Great Salt Lake, accumulate soluble minerals such as salt. In those lakes, people find it much easier to float than when they are in fresh water. Why is this the case?

What is the role of the air spaces in insulating materials? Select all that apply. They trap heat in the spaces. They puts gaps between the particles to slow down conduction. They dissipate energy faster.

Is it true or false that wave interference only occurs with transverse waves?

There have been several proposed atomic models during the last 150 years. Which model best illustrates the Bohr model. This model suggests that an atom's electrons orbit the nucleus in fixed patterns, much like the planets orbit the Sun.

During which type of change should you expect to see different chemical symbols before and after the change?

Ryan is examining the energy of the particles in a bar of gold. What is Ryan most likely studying? thermal energy electric energy potential energy internal energy