3 years ago

Explain, why in a real machine the output work is always less than the input work.

1 answer:

7 0

Because some of the work input is turned into waste byproducts like heat. A simple machine has friction to overcome, and by doing that heat is created

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Express ratio 3.5:14 as 1:n

Luba_88 [7]

Answer:

1 : 4

Step-by-step explanation:

3.5 : 14 ( divide both parts by 3.5 )

= 1 : 4

3 0

1 year ago

The sum of two numbers is 65. The smaller number is 11 less than the larger number. What are the numbers?

Irina-Kira [14]

Sum means u add the two numbers together

38 + 27 = 65

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3 years ago

A ball is thrown into the air. The height in feet of the ball can be modeled by the equation h = -16t2 + 20t + 6 where t is the

makkiz [27]

$f(t)=h=-16t^2+20t+6

$

a=-16, b=20, c =6

Δ= $b^2-4ac=20^2-4*(-16)*6=400+384=784$

$\sqrt{Δ}=\sqrt{784}=28$

max:

$p=-\frac{b}{2a}=-\frac{20}{-32}=\frac{20}{32}=\frac{5}{8}$

max heigh: $h=-16(\frac{5}{8})^2+20*\frac{5}{8}+6=-16\frac{25}{64}+\frac{100}{8}+6$

$h=-\frac{25}{4}+\frac{50}{4}+6=\frac{-25+50+24}{4}=\frac{49}{4}$

$h=\frac{49}{4}$ at $t=\frac{5}{8}s$

will fall down at t:

$t=\frac{-20-28}{-32}=\frac{-48}{-32}=\frac{3}{2}=1.5$

$t=1.5s$

8 0

3 years ago

7. It takes ounces of honey to make one apple pie. Betty baked 4 apple

Rom4ik [11]

Answer:

17.6 ounces to make the pecan pies. I dont know how much honey she used to make the apple pie so if you could pls say I could edit the answer :)

Step-by-step explanation:

4 0

3 years ago

PLEASE HELP ME I REALLY NEED HELP

Montano1993 [528]

Answer:

mean; 7.55

median: 9

range: 8

mode: 10

standard deviation: 2.9 or 3

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers