E = MV^2 ÷ 2 + mgh, If M=20, h=15, E=4900, g=9.8. Find V​

Answers

Answer 1

Answer:

V = 14 m/s

Step-by-step explanation:

[tex]E = MV^2 ÷ 2 + mgh \\ \\ 4900 = 20V^2 ÷ 2 + 20 \times 9.8 \times 15 \\ \\ 4900 = 10V^2 + 2,940\\ \\ 4900 - 2940 = 10V^2 \\ \\ 1960 = 10V^2 \\ \\ V^2 = \frac{1960}{10} \\ \\ V^2 = 196 \\ \\ V = \sqrt{196} \\ \\ V = 14 \: m {s}^{ - 1} [/tex]


Related Questions

John has $80. Every week, he spends $7.
Create an equation that represents how much money, m, he has after t weeks.
How much money, in dollars, will he have after the fourth week?
Enter the equation and the answer on separate lines.

Answers

John would have 52 dollars left by the fourth week.
7(dollars spent each week) x 4 ( number of weeks)=28 (spent in 4 weeks)

80 - 28 =52

What is the sum of i° + k°?

Answers

Answer

1 + 32 + 243 + 1024 + .. + n5

Step-by-step explanation:

IS THIS RIGHT? PLS HELP

Answers

Step-by-step explanation:

yes your answer is absolutely correct ..the value of x comes out to be -1 and 7 ..

n<5
Which of the following could be a possible value for n?

5
3
1
-3

Answers

3, 1, and -3 are all correct answers

Activity 3.
Convert the following to the indicated measurement:
1. 86 km
dam
9. 6, 600 min
hr
10. 415° F
2. 2 mi
in
3. 20 in
cm
11. 130 °C
-
F
4. 25.1 gal
الي
12. 2.3 gallon
qt
5. 45 acre
km
13. 632 ft
cord
6. 67.33 at
gal
14. 5.1 lb
grains
7. 90.67 km
ha
15. 1,800 oz
- kg
8. 6 days​

Answers

Activity 3.

Convert the following to the indicated measurement:

1. 86 km = 8600 dam

9. 6, 600 min = 110 htlrs

10. 415° F = 212.778° c

2. 2 mi = 126720 in

3. 20 in = 50.8 cm

11. 130 °C = 266° F

4. 25.1 gal = 100.4 qt

12. 2.3 gallon = 9.2 qt

5. 45 acre = 0.174 square km

13. 632 ft = 4.937 cords

6. 67.33 qt = 16.832 gallons

14. 5.1 lb = 35700 grains

7. 90.67 km = 9067 hectares

15. 1,800 oz = 51.029 kilograms

8. 6 days = 144 hours = 8640 minutes

(Please heart the answer if you find it helpful, it's a motivation for me to help more people)

Expand 3(y + 4).
3(y+4)=

Answers

Answer:

expanded it is x= 3(y+4)

Answer:

3*y + 3*4 = 3*m + 12

Step-by-step explanation:

Petrol is poured into a barrel.
The graph shows the number of litres of petrol in the barrel.
Calculate how much petrol is being poured into the barrel each minute.

Answers

“How much petrol is being poured each minute” is another way of saying slope. Slope is liters/minute, or rise over run.

It rises 140, and goes over 10.

140/10

= 14 liters per minute,

If I have $25.2, would it be $25.02 or $25.20?

Answers

Answer:

You would have $25.20

if it was 25.02 the 0 would be included, money can be rounded like this too

Answer:

Yeah he/she is correct because I did that too.

Step-by-step explanation:

The Jayden family eats at a restaurant that is having a 15% discount promotion. Their meal costs $78.25 before the discount, and they leave a 20% tip. If the tip applies to the cost of the meal before the discount, what is the total cost of the meal? Round your intermediate calculations and answer to the nearest cent.

Answers

Assumed 20% tip is on the discounted meal.

The cost of the meal is $78.65 .

The cost of the meal after discount (15%) is

78.65⋅(1−0.15)≈$66.85

Tip (20%) is : 66.85⋅0.2≈$13.37

Total cost of the meal is 66.85+13.37≈$8

if a dozen eggs cost $3.84 calculate the cost of 30 eggs​

Answers

Answer:

30

Step-by-step explanation:

please help and be correct please :( have a explanation also

Answers

Answer:

Part A: 3 bowls    Part B: See Below

Step-by-step explanation:

Part A: If he uses 1/6 to make ONE bowl, 3/6 is one half so he can make THREE bowls.

Part B: Just draw the fact of 1/2 being equal to 3/6 there for making 3 bowls and you'll be good! :)

Hope this Helped! ^ - ^

Julie's brother says that instead of paying her the $40 he owes her, he will give her
$2 today and double the amount she has each day for 6 days. Should Julie accept
her brother's offer? Why or why not?

Answers

Answer:

Yes

2*2*2*2*2*2=64

so that is a much better deal than the original 40$

Step-by-step explanation:

1.A five - layer of cake weighs half a kilogram per layer.In each layer,the cake is decorated with icing which weighs 15g.3 candles which weighs 100g each is added.What is the total weight in kilogram of the fully decorated cake?​

Answers

Answer:  2.815 kilograms

======================================================

Work Shown:

1 layer = 0.5 kg

5 layers = 5*(0.5 kg) = 2.5 kg

icing = 15 g = 15/1000 = 0.015 kg

1 candle = 100 g = 100/1000 = 0.1 kg

3 candles = 3*(0.1 kg) = 0.3 kg

------------------------

The five layers combine to 2.5 kg. On top of that we have 0.015 kg of icing, and then finally the three candles add 0.3 kg more weight.

The total weight is therefore: 2.5+0.015+0.3 = 2.815 kilograms

The radius of a circle is 14.2 ft. Find the circumference
to the nearest tenth.

Answers

Answer:

89.22123136

Step-by-step explanation:

Answer:

The answer is 89.2 :)

Step-by-step explanation:

How is a "series" different than a "sequence"?

Answers

Sequence is in order series is multiple of a collection or something like books there are series

Answer:

See below

Step-by-step explanation:

A series is the terms added together and a sequence is the list of terms.  When you add the terms of a sequence, then you have formed a series.

1 point
8. Find a positive angle that is less than 360° that is coterminal with a -80°
angle
*
260°
440°
-440°
None of the above

Answers

None of the above
Hope this helps you
none of the above hope this helps :)

I need help with math if you don't know the answer get out of the question and don't answer it and give the wrong answer or some link or even say "I don't know" or anything like that it's not fair to me cause it a waste of my points I will report your if you do that :) have a nice day and stay safe

Answers

Answer:

1.5 or 1 1/2 pounds of candy

Step-by-step explanation:

First, divide 2 into 4 equal pieces. You do this because of the denominator in 3/4.

2 divided by 4= 0.5

Then 0.5 times 3 because of the numerator in 3/4.

0.5 times 3= 1.5

You can convert this into the fraction 1 1/2 or you can leave it a 1.5

Hope this helps!

umm what is this?????​

Answers

Answer: The correct answer is 1/2 ÷ 1/11.

Step-by-step explanation:

Answer:

1/2 ÷ 1/11 :)

Step-by-step explanation:

11/2= 5.5 and so does 1/2 ÷ 1/11

None of the other answers equal to the same amount.

1/2 ÷ 3/14= 2.3

1/2 + 1/10= 5

8/11 + 1/2= 1.45

Hope this helps! <3

plz answer the picture below fast and correctly!

Answers

Answer:

a) BOC = 80⁰

b) COD = 60⁰

Step-by-step explanation:

..................

Answer:

BOC is 80 and COD is 60

Step-by-step explanation:

If DOF is 120 you subtract 40 from it because of of AOB then COD is the remaining of 180

Miles and Lucy decide to sell lemonade to earn some money. They buy pitchers, ice, and mix for a cost of $13.50. The mix makes 8 quarts of lemonade. They decide to sell one cup of lemonade for $0.75. If they sell all 8 quarts, how much revenue will they make and will they make enough to earn $12 each? (4c=1q)

Answers

Answer:

Altogether they made $24 which is enough to earn $12 each

Step-by-step explanation:

Important information:

1 cup: $0.75

4 cups = 1 quart

8 quarts of lemonade altogether

If we are looking to solve for the revenue earned based on quarts, we must first solve for how much money they make on 1 quart

Since 1 cup sells for $0.75 and 4 cups makes up a quart, we must multiply

0.75 × 4 = 3

They make $3 per 1 quart

We are looking for the amount for 8 quarts though, not just 1. Again we must multiply

3 × 8 = 24

They will make $24 if they sell all 8 quarts

The questions ask if they will each earn $12

Since there are two of them, Miles and Lucy, we must divide revenue earned by 2, the number of people

24 ÷ 2 = 12

$12

Create an expression that is equivalent to 9(3x + 5 + x) without using
parentheses.

Answers

Answer:

27x + 45 + 9x

37x + 45

it's here

Explain the first steps to factoring when the leading coefficient is 1.

a) List the factors of a that add up to b.
b) Split the c term to factor by grouping.
c) Find the factors of c that add up to b.
d) Multiply b and c, then find the factors.

Answers

Answer:

In general, for a trinomial of the form x2+bx+c x 2 + b x + c you can factor a trinomial with leading coefficient 1 by finding two numbers, p and q whose product is c, and whose sum is b.

please help me will mark brainleist (ik i spelled that wrong)​

Answers

Answer:

its way to blurry nobody can see

Answer:

x power 2 +2x-8 = - 6x power of 3

Combine the like terms to create an equivalent expression:2r+1+(−4r)+7

Answers

Answer:

2r+1+(-4r)+7

= -2r+8

= -2(r+4)

Step-by-step explanation:

A nesting box for a falcon is put on top of a 96 ft pole. There are 3 ft in 1 yd.

Answers

Answer:

32 yards

Step-by-step explanation:

Three sisters have ages that are consecutive odd integers. The sum of their ages is 57. Find the age of each sister.

Answers

Answer:

The answer is 17 19 and 21

hope i could help!

In ΔTUV, t = 410 cm, ∠U=27° and ∠V=78°. Find the length of v, to the nearest 10th of a centimeter.=

Answers

Answer: 415.2

Step-by-step explanation:

what expressions are equivalent to -2(4-3x)+(5x-2)​

Answers

Answer:

11x-10

Step-by-step explanation:

1.Rearrange terms

-2(4-3x)+(5x-2)

-2(-3x+4)+(5x-2)

2.Distribute

-2(3x+4)+(5x-2)

6x-8+(5x-2)

3.Eleminate redundant parentheses

6x-8+(5x-2)

6x-8+5x-2

4.subtract the numbers

6x-8+5x-2

6x-10+5x

5.Combine like terms

6x-10+5x

11x-10

•solution

11x-10

I NEED HELP PLS ASAP

Answers

it’s the second one 3√5

50.0 divided by 100 equals??

Answers

Answer:

0.5

Step-by-step explanation:

Hopefully u got it right

Step-by-step explanation:

If you meant 50 divided by 100

[tex]\frac{50}{100} = \frac{1}{2}[/tex]

or just .5

If you meant 500 divided by 100

[tex]\frac{500}{100} = 5\\[/tex]

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