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Korolek [52]
3 years ago
6

A fan motor turns at a given angular speed. How does the angular speed of the tips of the blades change if a fan of greater diam

eter is installed on the motor? Explain.
Mathematics
2 answers:
krek1111 [17]3 years ago
5 0
Qweejejejdjdjdjeejjfjfjsksks
Neko [114]3 years ago
5 0
The equation for speed is distance/time. If the ends of the blades have to travel a farther distance due to the greater diameter of the blades the angular speed will decrease. Angular speed = larger number / original time
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(i) Write the expansion of (x + y)² and (x - y)². (ii) Find (x + y)² - (x - y)² (iii) Write 12 as the difference of two perfect
zaharov [31]

Answer:

1a (x + y)² = x² + 2xy + y²

1b. (x - y)² = x² - 2xy + y²

2. (x + y)² - (x - y)² = 4xy

3. 4² – 2² = 12

Step-by-step explanation:

1a. Expansion of (x + y)²

(x + y)² = (x + y)(x + y)

(x + y)² = x(x + y) + y(x + y)

(x + y)² = x² + xy + xy + y²

(x + y)² = x² + 2xy + y²

1b. Expansion of (x - y)²

(x - y)² = (x - y)(x - y)

(x - y)² = x(x - y) - y(x - y)

(x - y)² = x² - xy - xy + y²

(x - y)² = x² - 2xy + y²

2. Determination of (x + y)² - (x - y)²

This can be obtained as follow

(x + y)² = x² + 2xy + y²

(x - y)² = x² - 2xy + y²

(x + y)² - (x - y)² = x² + 2xy + y² - (x² - 2xy + y²)

= x² + 2xy + y² - x² + 2xy - y²

= x² - x² + 2xy + 2xy + y² - y²

= 2xy + 2xy

= 4xy

(x + y)² - (x - y)² = 4xy

3. Writing 12 as the difference of two perfect square.

To do this, we shall subtract 12 from a perfect square to obtain a number which has a perfect square root.

We'll begin by 4

4² – 12

16 – 12 = 4

Find the square root of 4

√4 = 2

4 has a square root of 2.

Thus,

4² – 12 = 4

4² – 12 = 2²

Rearrange

4² – 2² = 12

Therefore, 12 as a difference of two perfect square is 4² – 2²

7 0
3 years ago
city planner is making a scale model of his city for his office building. The model has a coordinate grid where each unit is 1 m
Lelechka [254]

Answer:

(4, 1)

Step-by-step explanation:

For any rectangle or square located on the axes, match the pairs and find what's missing. 3 -- 3, 4 -- 4. unmatched are 4 and 1. 4 is x because it's missing from x and same for 1 and y.

plz mark me Brainliest

This has already been asnwered on brainly

5 0
3 years ago
What is 8.05x10^-5 in standard notation
Marina CMI [18]

Answer: 0.0000805

Step-by-step explanation:

You move the decimal 5 places to the left of 8.05.

6 0
3 years ago
Jane needs to pay $36 for 2 basketballs, how much she needs to pay 3 basketballs?​
OLga [1]

36 divided by 2 is 18

That mean each basketball is $18

18 dollars multiplied by 3 basketballs is 54

Three basket balls cost $54

5 0
3 years ago
Read 2 more answers
Banu is 20 years older than binu. In 5 years, Banu will be twice as old as binu. Find their present age.
Katarina [22]

Answer:

i think Banu is 40 and Binu is 20

Step-by-step explanation:

if Banu was 35 and Binu was 15, 5 years go by Banu is 40 so still 20 years older and Binu is 20, Binu is half the age of Banu.

3 0
3 years ago
Read 2 more answers
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