HELP PLEASE SHOW FULL WORK 1. wavelength of 6.60 mm

2. wavelength of 8.90 µm

3. wavelength of 743 nm

4. A photon of light has a wavelength of 5.00 cm. Calculate its energy in Joules. What type of radiation is this?

i believe that it is a exoplanet

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them