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kozerog [31]
4 years ago
5

Carlotta does 2000 j of work on a machine. The machine does 500 J of work what is the efficiency of this machine

Physics
1 answer:
almond37 [142]4 years ago
8 0

Efficiency of a machine = (useful output energy) / (total input energy)

Efficiency = (500 J output work) / (Carlotta's  2,000 J input work)

Efficiency = (500 J) / (2,000 J)

Efficiency = 0.25

<em>Efficiency = 25%</em>

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What does the term magnetic environment refer to?
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Explanation:

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4 years ago
ne true-breeding line of mice is obese and dark, and the other true-breeding line is lean and light. Dark is dominant to light,
LenKa [72]

Answer:

 \frac{3}{8}

Explanation:

Let the allele for dark color be represented by "D" and the allele for light color be represented by "d"

Also D is dominant over d

Similarly, let the allele for obese trait in mice be represented by "O" and the allele for lean trait in mice be represented by "L"

Obese and lean exhibit incomplete dominance

Genotype of true breeding dark and obese mice be DDOO

Genotype of true-breeding lean and light mice is ddLL

Offspring from F1 cross -  

DdOL

F2 cross is between DdOL * DdOL

DO         DL         dO          dL

DO DDOO DDOL DdOO DdOL

DL DDOL DDLL DdOL DdLL

dO DdOO DdOL ddOO ddOL

dL DdOL DdLL ddOL ddLL

dark and intermediate between obese and lean offspring genotype –  

2 DDOL, 4 DdOL  

So total six out of sixteen offspring are dark and intermediate between obese and lean -  

 \frac{6}{16} \\\frac{3}{8}

8 0
4 years ago
What is the force needed to accelerate a wagon with a mass of 10 kg at a rate
Mashutka [201]

Answer:

B

Explanation:

Remember:

<u>F = m * a </u>

 =  10 * 2  = 20 N

6 0
2 years ago
Read 2 more answers
Can someone please help me how to set this up?
fiasKO [112]
The car has a 12 mile head start, going 80 mph, so his distance is:dcar=80∗t+12
The is going at 108 mph, so his distance is:dcop=108t
Setting them equal to each other we get:80t+12=108t⇒12=28t⇒t=1228=37
So 3/7 of an hour.about 25.7 mins.
5 0
3 years ago
Read 2 more answers
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