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NARA [144]
2 years ago
14

Some homes have stairs that are too steep or narrow for moving large pieces of furniture. In such cases, furniture may be lift e

d by pulleys and moved in through upper windows. What is the efficiency of a system that uses 280 N of force to lift a 100 kg bed 6 m to an upper window? Those working the system have to pull 24 m of rope to lift the bed.
Biology
1 answer:
torisob [31]2 years ago
7 0

Answer:

The efficiency of the system is 89.3%

Explanation:

Efficiency of a machine is defined as the ratio of useful work done by a machine to the total work put into the machine.

Mathematically, efficiency = (work output/work input) * 100%

work output = load * load distance

where load = 100 kg * 10 m/s² = 1000 N; load distance = 6m

work output = 1000 * 6 = 6000 J

work input = effort * effort distance

where effort = 280 N, effort distance = 24 m

work input = 280 * 24 = 6720 J

Efficiency = (6000/6720) * 100%

Efficiency = 89.3%

Therefore, the efficiency of the system is 89.3%

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Una mujer lleva en uno de sus cromosomas X un gen letal recesivo (l), y en el otro alelo dominante normal (L). ¿Cuál es la propo
nlexa [21]

Question in English:

A female carries a recessive lethal gene (l) on one of her X chromosomes, and a normal dominant allele (L) on the other. What is the sex ratio to be expected in this woman's dependency if she marries a normal man?

Answer:

2/3 females

1/3 males

Explanation:

Females have two X chromosomes (XX) and males have an X and a Y chromosome (XY).

The genotype of the female is XLXl. The genotype of the male is XLY, since he is normal.

The possible genotypes are:

<u>                            XL                  Xl</u>

<u>XL</u>                     <em>XLXL             XLXl</em>

<u>Y</u>                       <em>XLY               </em><em>XlY</em>

<em />

All female offspring will be normal as they will always have one normal copy of the X chromosome from their father.

50% of the male offspring will be normal, but 50% will inherit the lethal gene from their mother.

Because the allele is lethal, that means XlY males will not be born.

That means 2/3 of the children will be females, and 1/3 will be males.

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2 years ago
In dna methylation, which nitrogenous base is most frequently methylated?
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3 years ago
Why does genetic engineering raise ethical concerns​
ELEN [110]

Answer:

Because genetic engineering is no longer based off the natural science of life it is humanly modified which concerns the ethical reasoning of human life and can lead to non humanly right creations

Explanation:

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Crop monitoring makes use of space-based data to keep tabs on crop development and forecast crop yields for certain fields that have been planted.

<h3>What is monitoring systems?</h3>

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<h3>How do farmers monitor their crops?</h3>

Nowadays, satellite techniques are widely employed in agriculture, and many farmers use them frequently to observe their fields and assess the condition of their crops. Crop monitoring is crucial for managing various pests, weeds, and diseases that affect crops. This gives information about the crop's current situation, and you can then look ahead in time to forecast what will probably be the crop's next problem.

To know more about Monitoring Systems visit:

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4 0
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Which two factors provide the genetic basis for variation within many species​
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Explanation:

<h2>HOPE IT HELPS </h2>
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