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Elena L [17]
2 years ago
6

A hair dryer wastes 376J for every 1500J of electrical energy it uses. How efficient is the hairdryer?

Mathematics
1 answer:
Leni [432]2 years ago
8 0

Answer:

\boxed{efficiency, \gamma  = 74.93 \%}

Step-by-step explanation:

efficiency, \: \gamma  =  \frac{1500 - 376}{1500}  \times 100 \\ \gamma  =  \frac{1124}{1500}  \times 100 = 74.93 \\ efficiency, \gamma  = 74.93 \%

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maria [59]

Answer:

B = 1.875

Step-by-step explanation:

given that A varies directly as B and inversely as C then the equation relating them is

A = \frac{kB}{C} ← k is the constant of variation

to find k use the condition A = 12 when B = 3 and C = 2 , then

12 = \frac{3k}{2} ( multiply both sides by 2 to clear the fraction )

24 = 3k ( divide both sides by 3 )

8 = k

A = \frac{8B}{C} ← equation of variation

when A = 10 and C = 1.5 , then

10 = \frac{8B}{1.5} ( multiply both sides by 1.5 )

15 = 8B ( divide both sides by 8 )

1.875 = B

8 0
1 year ago
What is the volume of the prism below
lesya [120]

Answer:

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Step-by-step explanation:

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I haven't did these type of questions in a while, but i think my answer is correct. Hope it helps :)

5 0
2 years ago
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Step-by-step explanation:

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