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garik1379 [7]
2 years ago
8

The kinetic energy k of an object in joules is given by the formula k=1/2mv² where m is the object's mass in kilograms and v is

its velocity in meters per second. An object’s velocity is 20 meters per second, and its kinetic energy is 48,000 joules. If it speeds up to 40 meters per second, what is its new kinetic energy?
Mathematics
1 answer:
Tamiku [17]2 years ago
5 0

Answer:

192000 J

Step-by-step explanation:

k = 1/2 mv²

48000 = 1/2 x m x (20)²

48000 = 200m

m = 240 kg

new k

k = 1/2 x 240 x 40²

k = 192000 J

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Please help !!!!!!!!!!!!!
Julli [10]

Answer:

→ The table is:

→  x  →  -1   →  0  →  1

→  y  →  -3  →  0  →  3

The graph of the line is figure d

Step-by-step explanation:

∵ y = 3x

∵ x = -1, 0, 1

→ Substitute the values of x in the equation to find the values of y

∴ y = 3(-1) = -3

∴ y = 3(0) = 0

∴ y = 3(1) = 3

→ The table is:

→  x  →  -1   →  0  →  1

→  y  →  -3  →  0  →  3

∵ The form of the linear equation is y = m x + b, where

  • m is the slope
  • b is the y-intercept

∵ y = 3x

→ Compare the equation with the form

∴ m = 3

∴ b = 0

→ That means the slope is positive, then the direction of the line must

   be from left tp right and passes through the origin

∴ The graph of the line is figure d

6 0
2 years ago
How many solutions does the system of equations have?
Vlad1618 [11]

Answer:

one solution at x=1,y=4 point

4 0
2 years ago
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Amy bought 0.4 kilogram of tomatoes for $4.00. What is the cost in dollars per kilogram of tomatoes?
nasty-shy [4]

Answer:

$10 per kilogram

Step-by-step explanation:

To eliminate the decimals,multiply everything by 10

0.4.........4

4.00.........40

4 kilos = $40

1 kilo = $10 (40/4)

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3 years ago
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Answer:

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Step-by-step explanation:

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Volume = width x height x base

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drek231 [11]
\frac{1}{4}x+\frac{1}{6}x+\frac{1}{2}x+22=x|\cdot12\\
3x+2x+6x+264=12x\\
x=264



 I guess there's a mistake in the question.
6 0
3 years ago
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