What type of evidence is the best indicator of how closely two species are related

When two atoms of the same nonmetal react, they often form a (an) A. ionic bond. B. polyatomic ion. C. diatomic molecule. D. polar molecule.

How many protons are in an atom of tin?

What is the name of the perceived change in a sound wave's frequency due to motion between the observer and the sound source?

Mechanical energy is the difference between the kinetic and potential energies of an object. True or False?

The light bulbs in an office building give off tremendous amounts of heat. bacause heat is a form of energy, this heat could be trapped and used to offset our need for electricity, thus saving energy and money. true false

550 g of water at 105°C is poured into an 855 g aluminum container with an initial temperature of 11°C. The specific heat of aluminum is 900 J / (kg K).

what occurs when the soccer ball contacts the hands or arm of any player on the field except the goalkeeper?

Sand on a beach is covered by other layers of sand over time. The extra layers compress the first layer, packing it tighter and tighter. Over time, the bottom layers of sand have formed into sandstone, with colored bands showing the different layers.

How do i solve A sound wave has a frequency of 658 Hz in air and a wavelength of 0.46 m. What is the temperature of the air? Assume the velocity of sound at 0◦C is 331 m/s. Answer in units of ◦C

How has the space program affected Florida's culture