An electron is trapped in a square well of unknown width, l. It starts in unknown energy level, n. When it falls to level n-1 it emits a photon of wavelength λphoton = 2280 nm. When it falls from n-1 to n-2, it emits a photon of wavelength λphoton = 3192 nm.

Tortoise shells and snail shells are similar in function: they protect the organism from predators. based on a comparison of the organisms in the images, what can you conclude? 1. tortoises and snails have homologous organs, and they’re evolutionarily related. 2. tortoises and snails have homologous organs, and they belong to same species. 3. tortoises and snails have analogous organs, and they belong to the same species. 4. tortoises and snails have analogous organs, and they don’t belong to the same species. 5. tortoises and snails have analogous organs, and they aren’t evolutionarily related.

Sweater originally priced at $65 is on sale for 15% off.you also have a coupon that takes another $10 off.what percent of the original price do you pay?

Which of the following is a characteristic of the coverdell education savings account