how many joules of energy are required to vaporize 423 gram of water at 100 degrees Celsius and 1 atm?

What total magnification would you have if you used a microscope with an objective lens of 10X and an ocular of 10 X?

gulaghasi [49]

Answer:

100x magnification

Explanation:

10x10= 100 times magnification

8 0

3 years ago

How will the excretory system respond when an animal is thirsty?

pashok25 [27]

I think B seems like the answer.

7 0

3 years ago

A child with down syndrome is born with the genotype aaa. the father is genotype aa and meiosis occurs normally. non-discjunctio

nirvana33 [79]

Nondisjunction results when chromosomes in gametes (egg and sperm cells) do not separate properly during meiosis (cell division of gametes in 2 stages), producing gametes which have more or less than the normal number (23) of chromosomes.

Nondisjunction occurs during anaphase of either Meiosis I or Meiosis II. Anaphase is the splitting and pulling of the chromosomes, lined up at the center of the cell, to the edges or poles of the cell. Shown in the figures below are examples of when nondisjunction occurs in Meiosis I (Anaphse I) and in Meiosis II (Anaphase II).

(Figures source: http://study.com/academy/lesson/nondisjunction-in-meiosis-definition-examples-quiz.html)

8 0

3 years ago

A weather map is an example of a

Vilka [71]

A model<span>
Hypothesis
Or a scientific theory!</span>

8 0

3 years ago

What causes the respiratory center in the medulla oblongata

yanalaym [24]

This question seem to be incomplete... Here is the full question

What causes the respiratory center in the medulla oblongata of the brain to increase the rate of respirations?

Answer:

decreased amount of oxygen or increased amounts of carbon dioxide in the blood

Explanation:

The medulla oblongata and the pons are involved in the regulation of the ventilatory pattern of respiration.

The decrease in blood pH result from the decreased amount of oxygen, Hypoxemia refers to insufficient oxygen in the blood. Thus any cause that influences the rate or volume of air entering the lungs (ventilation) or any cause that influences the transfer of air from the lungs to the blood may cause hypoxemia.

In response to a decrease in blood pH, the respiratory center (in the medulla ) sends nervous impulses to the external intercostal muscles and the diaphragm, to increase the breathing rate and the volume of the lungs during inhalation.

Also, Let take a look at a situation of an individual suffering from an anxiety attack(i.e hyperventilating). The increased ventilation rate will remove too much carbon dioxide from their body, (this implies that there is increased amounts of carbon dioxide in the blood). Without that carbon dioxide, there will be less carbonic acid in blood, so the concentration of hydrogen ions decreases and the pH of the blood rises.

In response, the respiratory chemoreceptors detect this change, and send a signal to the medulla, which signals the respiratory muscles to decrease the ventilation rate so carbon dioxide levels and pH can return to normal levels.

8 0

3 years ago