Round to 3.455 cm into 4 significant figures

A sample of silver (with work function φ = 4.52 ev) is exposed to an ultraviolet light source (λ = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if:

A spring is stretched 55 cm from its testing position. If the spring's constant of proportionality is 15N / m, what is the spring potential energy? (Keep 3 significant figures)

Chemist can control the rates of reaction by changing what factor

What is the percent of nitrogen (N) by mass is a 55.0g sample of Fe (NO3) 3? The molar mass of Fe (NO3) 3 is 241.86g/mol.

How many lecterns does N need to gain to become isoelectronic with noble gas

Which volcanoes are located on a diverging boundaries

What is the chemical formula for the chemical reaction that occurs when a bath bomb is placed in water?

Which is most likely why many scientists reject the cold fusion theory? There is too much waste involved in the process. Cold fusion experiments have been conducted at room temperature only.

Why is the sunlight written above the arrow in the equation, rather than on either side of it?

What is the significance of molecular formula