What changes were necessary in earth's atmosphere to allow complex organism to evolve

One mole of an gas expannds isothermally to five times to its intitial volume calculate the entropy change in R the gas constant

What are the plastic connectors that you put wires into called?

The head of a rattlesnake can accelerate at 49 m/s2 in striking a victim. If a car could do as well, how long would it take to reach a speed of 81 km/h from rest?

Which of the following is a scalar? centripetal force weight speed acceleration

What is latent heat of fusion ...

During which period did the first large herbivores and carnivores appear?

What is the reason behind the tail of a comet moving away from the Sun? A The gravity of Jupiter pulls it away from the Sun. The nucleus of the comet propels it away from the Sun. C. The radiation pressure and solar wind propels it away from the Sun.

Calculate the energy released as heat when 51.60 g Cu 2 O (s) undergo oxidation at constant pressure.

During summer vacation, Juan traveled a total distance of 400 miles. His trip took 8 hours. What was the average speed during his trip?

Where Pabs is absolute pressurePg, is gauge pressure, and Patm is atmospheric pressure. For example, if your tire gauge reads 34 lb/incz (pounds per square inch), then the absolute pressure is ...