A drive has a maximum speed of 10,000 revolutions per minute. If a disc has a diameter of 14 cm, what is the linear speed, in km/h, of a point 6 cm from the center if the disc is spinning at a rate of 6000 revolutions per minute?

Answers

Answer 1

Answer:

The point 6 cm away from the center travels in a circle of circumference 2π*(6 cm) = 12π cm, so that it covers this distance per revolution, 12π cm/1 rev.

So the disk has a linear speed of

(6000 rev/min) * (12π cm/rev) = 72,000π cm/min

which is equivalent to

(72,000π cm/min) * (1/100,000 km/cm) * (60 min/h)

or approximately 135.7 km/h.

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Convert 57ft per hour to 57 ft per minute. How do I convert from ft per hr to ft per min?

Answers

Divide by 60 because it is hour to minutes. Just ignore the feet because it can confuse you. Since it is the same unit before and after the conversion, we dont have to do anything to it.
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Simply a3 • a4
And (2a) (5ab)

Answers

Answer:

a^3 (a^4) = a^7

(2a)(5ab) = 10a^2b

Step-by-step explanation:

3b I don't get I know the answer is x=-2 and y=-3 I just can't get it

Answers

$x+5y=-17\n3x-4y=6\n\nx=-17-5y\n3x-4y=6\n\n3(-17-5y)-4y=6\n-51-15y-4y=6\n-19y=57\ny=-3\n\nx+5\cdot(-3)=-17\nx-15=-17\nx=-2$

Kwan said that the product of 5/6 × 2 1/3 is 10/3.How can you tell that his answer is wrong?

Answers

they have not converted the second number into an improper fraction

Solve for x
w=-2x+p/2

Answers

Answer:

x= -w/2 + p/4

Step-by-step explanation:

hope this helps!

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