Everything around us is made of

For diffusion to occur, which condition must be met? A) A concentration gradient must exist. B) A hypotonic external environment is required. C) A hypertonic external environment is required. D) Dynamic equilibrium must exist.

How do biotic and abiotic factors affect an organism's survival?

Why doesn't the reaction Pb+Zn (C2H3O2) 2--> Zn + Pb (C2H3O2) 2 occur?

How is a shadow created during a lunar or solar eclipse?

Determine the specific heat of a 213.0 g piece of metal in J/g•°C if the temperature of the metal drops from 70.2 °C to 25.6 °C when placed in a calorimeter with 250.0 mL of water at an initial temperature of 22.5 °C (specific heat of water is 4.

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure