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Alex_Xolod [135]
3 years ago
6

What is the difference between a chemical and physical property?

Biology
1 answer:
charle [14.2K]3 years ago
4 0
A physical property is an aspect of matter that can be observed or measured without changing it. A chemical property may only be observed by changing the chemical identity of a substance.
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Cooking is easy in pressure cooker why?
bazaltina [42]

Answer:

This compression increases the pressure inside cooker to more than atmospheric pressure which in turns increases the boiling point of the remaining water.

Explanation:

This compression increases the pressure inside cooker to more than atmospheric pressure which in turns increases the boiling point of the remaining water. ... Higher temperature of water means higher transfer of heat to food kept in it and hence the faster cooking.

3 0
3 years ago
How much natural gas is used in the United States each year? How does this compare with oil and coal use?
kap26 [50]

Answer:In 2019, the United States consumed about 31.01 trillion cubic feet (Tcf) of natural gas.

Explanation:

3 0
3 years ago
The number of bacteria in a certain population is predicted to increase according to a continuous exponential growth model, at a
Brilliant_brown [7]

The given question is incomplete. The complete question is as follows;

The number of bacteria in a certain population is predicted to increase according to a continuous exponential growth model, at a relative rate of 16% per hour. Suppose that a sample culture has an initial population of 71 bacteria. Find the predicted population after three hours Do not round any intermediate computations, and round your answer to the nearest tenth bacteria .

Answer:

114.7

Explanation:

A (t) represent the population of the bacteria at the time t.

Since, the population grows exponentially, the population can be calculated as follows:

A (t) = Ao ×  e^{kt}

A (t) is teh final population, Ao is the initial population, e is the exponential, k is rate and t is time.

A (t) = 71  × e^{0.16\times t}

For t = 3 hours

A (t) = 71 × e^{0.16\times 3}

A (t) = 114.7.

The population of bacteria after 3 hours is 114.7.

6 0
3 years ago
Complete the sentences to describe natural selection
Vikentia [17]
  1. The environment needs to change in order to natural selection to occur.

Reason:

Because, Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

2. Population has some genetic variations.

Reason:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by:

mutation and random mating between organisms

3. Nature select organism with specific traits to survive and reproduce.

Reason:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

6 0
3 years ago
This is the general outline of Recombinant DNA Technology according to my teacher. Can you explain VI for me? It sounds a bit va
natta225 [31]

Answer:

All plasmids we manufactured are free of animal-derived materials and can contain low levels of endotoxin (<100EU/mg, on request). This process is designed to meet our customers’ diverse downstream applications such as transfection, antibody preparation, vaccine, and gene-therapy research, etc.

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3 years ago
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