Chemistry for Biologists: Some basic chemistry
Some basic chemistry
Living organisms and chemistry
Biology is about living things - organisms. All living organisms are made of chemicals. To understand biological substances and the changes that take place in living organisms you need a good knowledge of the underlying chemistry. We will build up a picture of the chemicals that make up living organisms by starting small and getting bigger.

The starting point is atoms - the building blocks of all matter. We will then look at how these come together to make elements and compounds.

5 0

3 years ago

A bag is dropped from a hovering helicopter. After 42.4s, calculate the bag’s displacement.

Ann [662]

Answer:

8,809.024m

Explanation:

Displacement , y = (gt^2/2 )

g = 9.8 m/s^2

t = 42.4s

y = (9.8 (42.4*42.4)) / 2

y = 8,809.024m

3 0

3 years ago

What happens to the temperature and thermal energy of water when it is heated in a pot on the stove?

Gekata [30.6K]

Answer:

Both its temperature and its thermal energy will increase.

Explanation:

Objects are made up of particles. For example, water is made up of water molecules. The kinetic energy of a particle of mass $m$ and velocity $v$ is equal to $\displaystyle \frac{1}{2}\, m \cdot v^2$ ,

The thermal energy of an object measures the total kinetic energy of all its particles.
On the other hand, the temperature of that object measures the average kinetic energy of all these particles.

Water in that pot gains energy when the pot is heated. That would increase the total kinetic energy of these water molecules.

What about temperature? Assume that the number of water particles in the pot stays the same- In other words, assume that water in the pot does not evaporate. As the total kinetic energy of these water molecules increase, their average kinetic energy would also increase. As a result, it would appear that the temperature of water in that pot has increased.

7 0

4 years ago

Susan’s monthly energy usage is shown in the table.

Gala2k [10]

The answer is $31.05

6 0

3 years ago