All categories

2 years ago

A motor with an efficiency of 75 percent must supply 240 j of useful work. What amount of work must be supplied to the motor.

1 answer:

andrey2020 [161]2 years ago

3 0

E = 75% = 0.75, Work Output = Useful Work = 240 J, Work Input = ?

Efficiency, E = Work Output / Work Input

0.75 = 240 / Work Input

Work Input = 240 / 0.75

Work Input = 320

Amount of work supplied = Work Input = 320 J

I hope this explains it.

You might be interested in

Designer Dolls, Inc., found that the number N of dolls sold varies directly with their advertising budget A and inversely with t

denis-greek [22]

here we are told that

number of dolls sold varies directly with advertising costs

number of dolls varies inversely with price of a doll

so initially

1800 dolls sold when advertising costs were $ 34 000

and price of a doll was $ 25

next they increased the advertising costs to $ 42 000

as we know number of dolls sold varies directly with advertising costs

so here when the advertising costs increase the number of dolls sold too should increases as its directly proportional relationship

we arent told that the price of a doll is changed so there's no effect on the number of dolls sold due to changes in price of a doll

only effect on number of dolls sold is due to increase in advertising costs

increase in advertising cost leads to increase in number of dolls sold

from the given options, only in one option the number of dolls sold are more than 1800 dolls. option is C with 2224 dolls

therefore correct answer is C. 2224 dolls

8 0

2 years ago

Read 2 more answers

How are these triangles congruent??????

Soloha48 [4]

Answer:

SAS Test

Step-by-step explanation:

6 0

2 years ago

Can someone please help me .

dusya [7]

Answer:

for 10. a

for 11. f.

Step-by-step explanation:

5 0

3 years ago

Identify which is a hypothesis or a conclusion. A polygon is a rectangle. The polygon has four congruent angles

Lelechka [254]

Answer:

Step-by-step explanation:

6 0

2 years ago

Jason and Yolanda both drew a simple random sample from a non-normally distributed population of 25,000. Jason’s sample consiste

Ksenya-84 [330]

Both the sample can be used to make inferences about the population.

The correct option is D.

Given

Jason and Yolanda both drew a simple random sample from a non-normally distributed population of 25,000.

Jason’s sample consisted of 0.24% of the population, while Yolanda’s sample consisted of 0.32% of the population.

<h3>Percentage;</h3>

A percentage is a number or ratio that can be expressed as a fraction of 100.

According to the question

Total number of population = 25000

Percent of a sample of Jason = 0.24%

Percent of the sample of Yolanda's = 0.32%

So, the number of the population according to Jason's sample is given by;

$=\dfrac{0.24}{100}\times 25000\\\\=0.24 \times 250\\\\=60$

The number of the population according to Yolanda's sample is given by;

$=\dfrac{0.32}{100}\times 25000\\\\=0.32 \times 250\\\\=80$

Hence, Both the sample can be used to make inferences about the population

To know more about the percentage click the link given below.

brainly.com/question/16216214

5 0

1 year ago