1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ganezh [65]
3 years ago
6

Can humans survive lower temperatures when the pressure is lower

Biology
1 answer:
Lemur [1.5K]3 years ago
7 0

<span>I think one cannot really separate the lack of oxygen from air pressure. Because the inside pressure balance the outside pressure, if the pressure is low outside, one cannot inhale lots of air without lung injury. Similarly, a scuba diver always inhale air at the pressure associated with its depth. (In consequence divers absorb much more oxygen (and consume more air) in deep water than in shallow water). You may eventually separate air pressure from oxygen if you consider someone who put a single arm or leg in a artificially very low pressure environment</span>
You might be interested in
the closest relatives of seed plants are thought to be the select answer . the ability of seeds to disperse in places where wate
sertanlavr [38]

Horsetails and ferns are the closest living relatives to seed plants and are thought to be the closest relatives of seed plants.

A spermatophyte, as known or named at another time or place phanerogam or phaenogam, is a plant that produces sources, therefore the alternative name is seed plant. Spermatophytes are a subdivision of embryophytes or land plants.

The two bigger types of seed plants are the gymnosperms (sources in cones) and angiosperms(sources in ovaries of flowers). Horsetail is generally expended in the form of a beverage, that is created by steeping the drained spice in a jam. It's too feasible in capsule and coloring form. Horsetail is a bush that holds many advantageous compounds, especially antioxidants and silica.

To know more about seed plants refer to: brainly.com/question/776924

#SPJ4

3 0
1 year ago
Which of the following is not a possible consequence of animals ingesting marine debris? a. Injury b. Starvation c. Suffocation
IRISSAK [1]

Answer:

The correct answer is c) suffocation

3 0
2 years ago
What is the unit of pressure?why is it call derived unit ?give reason​
trasher [3.6K]

Answer:

The derived unit of pressure is newton per metre square (Pa). It is a derived unit because it's obtained by adding two or base quantities.

The symbol is Pa and the expression in terms of SI base units is m-¹kgs-²

3 0
3 years ago
2. List three sources of error that could account for the differences between your values for the enthalpy of fusion of water an
Dvinal [7]

1 trial :  nothing is given for result comparision - so we have no idea if it's a mistake.

2nd trial : The results can be compared - if varies, one may go wrong, but which one?

3rd trial : If 3rd result is different from 1st and 2nd, it is unreliable.

calculating enthalpy of fusion. M, C and m,c = mass and specific heat of calorimeter and water, n, L = mass and heat of fusion of ice; T = temperature fall.

L = (mc+MC)T/n.

c=4.18 J/gK. assuming copper calorimeter , so C=0.385 J/gK.

1. M = 409g, m = 45g. T = 22c, n = 14g

L = (45*4.18+409*0.385)*22/14 = 543.0 J/g.

2. M = 409g, m = 49g, T = 20c, n = 13g

L = (49*4.18+409*0.385)*20/13 = 557.4 J/g.

3. M = 409g, m = 54g, T = 20c, n = 14g

L = (54*4.18+409*0.385)*20/14 = 547.4 J/g.

(i) Estimate error in L from spread of 3 results.

Average L = 549.3 J/g.

squared differences average (variance) = (6.236^2+8.095^2+1.859^2)/3 = 35.96

standard deviation = 5.9964

standard error = SD/(N-1) = 5.9964/2 = 3 J/g approx.

% error = 3/547 x 100% = 0.5%.

(ii) Estimate error in L from accuracy of measurements:

error in masses = +/-0.5g

error in T = +/-0.5c

For Trial 3

M = 409g, error = 0.5g

m = 463-409, error = sqrt(0.5^2+0.5^2) = 0.5*sqrt(2)

n =(516-463)-(448-409)=14, error = 0.5*sqrt(4) = 1.0g

K = (mc+MC)=383, error = sqrt[2*(0.5*4.18)^2+(0.5*0.385)^2] = 2.962

L = K*T/n

% errors are

K: 3/383 x 100% = 0.77

T: 0.5/20 x 100% = 2.5

n: 1.0/14 x 100% = 7.14

% errors in K and T are << error in n, so ignore them.

% error in L = same as in n = 7% x 547.4 = 40

The result is (i) L= 549 +/- 3 J/g or (ii) L = 550 +/- 40 J/g.

Both are very far above  334 J/g, so there is at least one systematic error  

e.g: calorimeter may not be copper, so C is not 0.385 J/gK. (If it was polystyrene, which absorbs/ transmits little heat, the effective value of C would be very low, reducing L.)

Using +/- 40 is best.

However, the spread in the actual results is much smaller

* measurements were "fiddled" to get better results; other Trials were made but only best 3 were chosen.

<h3>Other sources of error: </h3>

L=(mc+MC)T/n is too high, so n (ice melted) may be too small, or T (temp fall) too high - why?

* we have assumed initial and final temperature of ice was 0c, it may actually have been colder, so less ice would melt -which explain small values of n

* some water might have been left in container when unmelted ice was weighed (eg clinging to ice) - again this could explain small n;

* poor insulation - heat gained from surroundings, melting more ice, increasing n - but this would reduce measured L below 334 J/g not increase it.

* calorimeter still cold from last trial when next one started, not given time to reach same temperature as water - this would reduce n.

3 0
3 years ago
Which best describes the structure of DNA
goldfiish [28.3K]

Answer:

A

Explanation:

8 0
2 years ago
Other questions:
  • Which of the following is not a factor influencing preventive measures used to combat the spread of disease? A. Antibiotics B. S
    13·2 answers
  • How are photosynthesis and cellular respiration linked (molecularly and ecologically)
    12·1 answer
  • Please help , thank you :)
    11·1 answer
  • True or false: the earths mantle lies directly below the inner core
    5·2 answers
  • Consider a population of 1099 apple fly maggots. In this population, you observe that the allele frequency of the dominant allel
    7·1 answer
  • Why do you think Hawaii has a “High” level of risk?
    6·2 answers
  • Name the 4 macro molecules
    8·1 answer
  • Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
    11·1 answer
  • What is the first step in making a transgenic organism?
    9·2 answers
  • Answer could be <br> A.)3/16<br> B.)9/16<br> C.)11/16<br> Or D.)13/16
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!