A photon has a wavelength of 624 nm. calculate the energy of the photon in joules

Name two fluid technologies that make use of water

If the cars are traveling at a constant speed, do they have a balanced force or unbalanced force acting upon them?

A crate is at rest on the ground. What force or forces are acting on the crate? A. There are no forces acting on the crate. B. The weight of the crate is acting downward on the crate. C.

A banana split contains 1.12 million calories. What is the energy value in kilojoules? a. 1.12 kJ b. 4.686 x 10^3 kJ c. 4686 kJ d. 2.68 x 10^5 kJ e. 268 kJ

Radium has a half-life of 1,620 years. In how many years will a 1 kg sample of radium decay and reduce to 0.125 kg of radium? a. 1,620 years b. 3,240 years c. 4,860 years d. 6,480 years

Which of the following does NOT describe acute exposure to hazardous materials? A. Determination of exposure is almost always after the fact. B. Long time period between exposure to an agent and the onset of symptoms. C.

Select the correct answer. In the graph, what effect would adding a catalyst have on D? A. It would decrease. B. It would increase. C. It would stay the same. D. You cannot tell from this graph.

Estimate the heat of neutralization of H3PO4 in kJ/mol given these dаta: Heat transferred = 2.5 x 102 J Moles of H3PO4 = 1.4 x 10-3 mol Moles of NaOH = 5.0 x 10-3 mol

Consider the elemts Ca, Ba, As, and Bi. Which has the ... largest radius? highest electronegativtity? Highest Ionization Energy?

How do guys Make sperm?