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Mathematics

1 answer:

Lapatulllka [165]2 years ago

4 0

Answer:

<h3>she should choose the most calm, kind, and smart kids</h3>

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A three inch diameter pulley on an electric motor that runs at 1800

Bezzdna [24]

Answer:

a) 3 inch pulley: 11,309.7 radians/min

6) 6 inch pulley: 5654.7 radians/min

b) 900 RPM (revolutions per minute)

Step-by-step explanation:

Hi!

When a pulley wirh radius R rotantes an angle θ, the arc length travelled by a point on its rim is Rθ. Then the tangential speed V is related to angular speed ω as:

$V=R\omega$

When you connect two pulleys with a belt, if the belt doesn't slip, each point of the belt has the same speed as each point in the rim of both pulleys: Then, both pulleys have the same tangential speed:

$\omega_1 R_1 = \omega_2 R_2\\$

$\omega_2 = \omega_1 \frac{R_1}{R_2} =1800RPM* \frac{3}{6}= 900RPM$

We need to convert RPM to radias per minute. One revolution is 2π radians, then:

$\omega_1 = 1800*2\pi \frac{radians}{min} = 11,309.7\frac{radians}{min}$

$\omega_2 = 5654.7 \frac{radians}{min}$

The saw rotates with the same angular speed as the 6 inch pulley: 900RPM

3 0

3 years ago

What is the slope of the line that passes through the points (9,60 and (14,7)?

bija089 [108]

This is (y2-y1)/(x2-x1), y2 being 12, y1 being 7, x2 being -39 and x1 being 26. So if you plug in the points it would be: (12-7)/(-39-26). This solved equals: -5/65 which simplified equals: -1/13

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2 years ago

PLEASE HELP ASAP! BRAINLIEST TO BEST/RIGHT ANSWER!

Gelneren [198K]

3x3x3x3 = 81
x.x.x.x = x^4
2x2x2x2 = 16

B. 81x^4/16

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3 years ago

There are five kids at the park with pieces of candy. Sara has fourteen pieces, Jon has seventeen pieces, Sam has eight pieces,

MakcuM [25]

Answer:

Step-by-step explanation:

The mean is the average of the data points.