Which is true about mechanical waves

A. It must travel in empty space

B. Both sound and light are examples.

C. It must have a medium

D. It can travel in a vacuum.

At would be the saturation concentration (mole/l) of oxygen (o2) in a river in winter when the air temperature is 0°c if the henry's law constant at this temperature is 2.28 * 10-3 mole/latm

A 56 g sample of peanut oil has a volume of 60.9 cm³. Calculate the density of the peanut oil

Most chemical changes in living things cannot take place without what?

Match the formula for the following compound: HgO2 Mercury (IV) oxide Mercury (II) oxide Mercury dioxide Mercury oxide

The volume of a rock was determined by the displacment method to be 550 cm cubed. It has a mass of 55 g. Calculate the density of the rock.

What are two fungal skin infections that humans can contract? pneumonia and ergot disease ergot disease and athlete's foot athlete's foot and ringworm ringworm and pneumonia

A critical biotic factor in Yellowstone National Park is A) geographic isolation B) high elevation C) high temperature in the summer D) population of wolves E) proximity to water

If energy can neither be created nor destroyed in a chemical reaction, what can happen to the energy

Effect of ph on conformation of aplha helix

How can we tell when something is polar or non-polar in an Inter-molecular Force?