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Ierofanga [76]
4 years ago
6

Besides parallax, how else can we determine the distances to stars

Biology
2 answers:
cupoosta [38]4 years ago
6 0

Answer:

There is no direct method currently available to measure the distance to stars farther than 400 light years from Earth, so astronomers instead use brightness measurements. It turns out that a star's color spectrum is a good indication of its actual brightness.

Explanation:

Soloha48 [4]4 years ago
6 0
The use of cepheid variables is your answer
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A researcher would like to determine the effect of caffeine on memory. Participants are randomly assigned to receive a caffeine
zhuklara [117]

Answer:

The placebo effect

Explanation:

The placebo effect in psychology refers to a situation in which participants in a research receive beneficial effects due to the administration of an inactive substance or a sham treatment. The positive beneficial effect received can then be attributed purely to believe and not to the treatment itself. A placebo treatment could produce a real healing effect like a true medical or psychological treatment.

The participants who received the sugar believed it to be a memory enhancing treatment hence the slight increase in memory capacity due to placebo effect.

5 0
4 years ago
Read 2 more answers
The scientists mapping the SNPs in the human genome noticed that groups of SNPs tended to be inherited together, in blocks known
Over [174]

Answer:

SNPs have shown that only 0.1 % of DNA sequences are different in the human genome between different individuals, thereby all the inherited phenotypic variation observed in our species is associated with only 0.1 % of differences at the genome level  

Explanation:

Haplotypes are block-like sequences of DNA that are inherited together due to low recombination rates. Moreover, single-nucleotide polymorphism (SNP) mapping is a very useful methodology used to map the site of SNP mutations (i.e., SNP variants). In this regard, it has been observed that there are approximately 10 million common SNPs in the human genome. These SNPs contribute to the wide range of phenotypic variation observed in human populations for different traits (e.g., eye color, hair, weight, height, etc). Moreover, researchers have determined that SNPs can be clustered into haplotypes, thereby haplotypes can be accurately sampled by as few as approx. 300,000 selected SNPs, which are sufficient to represent all of the genetic variation across different human genomes.

5 0
3 years ago
At which angle of sunlight does the least amount of heating occur?
valina [46]

Answer:

third option

Explanation:

possibly the third option at 45 degrees (half of a right angle, or like mid-morning) above the horizon the sun's rays strike Earth's surface and spread out over a larger surface area with less intensity, making these regions experience lower temperatures.

7 0
3 years ago
According to the food chain, label the following organisns appropriately
aniked [119]
2rabbit   4snake   1owl   3carrot
4 0
3 years ago
What is the average velocity of the skier in the image
ankoles [38]

Answer:

210 m

Explanation:

just look at the image ad you will see

8 0
3 years ago
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