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aleksandrvk [35]
3 years ago
13

What is the value of g? 18g+7=g

Mathematics
1 answer:
aleksley [76]3 years ago
7 0

Answer: g=-7/17 or -0.41176470


Step-by-step explanation:


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A 0.311 kg tennis racket moving 30.3 m/s east makes an elastic collision with a 0.0570 kg ball moving 19.2 m/s west. Find the ve
max2010maxim [7]

<u>Answer</u>:

The velocity of the tennis racket after the collision 14.966 m/s.

<u>Step-by-step explanation:</u>

An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same.

So, the total kinetic energy before collision = the total kinetic energy after collision.

For the given problem let the following:

m₁ = mass of tennis racket = 0.311 kg

m₂ = mass of the ball = 0.057 kg

u₁ = velocity of tennis racket before collision = 30.3 m/s

u₂ = velocity of the ball before collision = -19.2 m/s

v₁ = velocity of tennis racket after collision

v₂ = velocity of the ball after collision

Right ⇒east  (+) , Left⇒ west (-)

v₁ = [ u₁ * (m₁ - m₂) + u₂ * 2m₂ ]/ (m₁ + m₂)

  = ( 30.3 * (0.311 - 0.057) - 19.2 * 2 * 0.057 ) / ( 0.311 + 0.057)

  = 14.966 m/s.

So, the velocity of the tennis racket after the collision 14.966 m/s.

5 0
3 years ago
The sum of three numbers is 3. if the second number is subtracted from the sum of the first and third numbers, the result is 9.
Margaret [11]
Let the three numbers be x, y, and z.

If the sum of the three numbers is 3, then x+y+z=3

If subtracting the second number from the sum of the first and third numbers gives 9, then x+z-y=9

If subtracting the third number from the sum of the first and second numbers gives -5, then x+y-z=-5

This forms the system of equations:
[1] x+y+z=3
[2] x-y+z=9
[3] x+y-z=-5

First, to find y, let's take do [1]-[2]:
x+y+z=3
-x+y-z=-9
2y=-6
y=-3

Then, to find z, let's do [1]-[3]:
x+y+z=3
-x+-y+z=5
2z=8
z=4

Now that you have y and z, plug them into [1] to find x:
x+y+z=3
x-3+4=3
x=2

So the three numbers are 2,-3, and 4.


5 0
3 years ago
A piece of bad news about your hotel goes viral. If each person, spreads the news to 5 people within 1 minute, how long will it
Lady_Fox [76]

A 20,000,000


Hope my answer helped


5 0
3 years ago
Read 2 more answers
Factor -24a3b3c3 - 84a4b2c.
My name is Ann [436]
The answer is B. It’s not too difficult

4 0
3 years ago
Read 2 more answers
which description best describes the solution to the following system of equations y= -2x +3 y= -x + 1
marin [14]
For this case we have the following system of equations:
 y = -2x +3&#10;&#10;y = -x + 1
 Equating the values of y we have:
 -2x +3 = -x + 1&#10;
 From here, we can clear the value of x.
 We have then:
 -2x + x = 1 - 3&#10;&#10;-x = -2&#10;&#10;x = 2
 Then, we look for the value of y.
 For this, we substitute x in any of the equations:
 y = -x + 1&#10;&#10;y = -2 + 1&#10;&#10;y = -1
 Answer:
 
The ordered pair solution of the system of equations, is given by:
 
(x, y) = (2, -1)
3 0
2 years ago
Read 2 more answers
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