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a_sh-v [17]
4 years ago
6

What does amplitude measure ?

Physics
1 answer:
777dan777 [17]4 years ago
3 0
"The maximum extent of a vibration or oscillation"
-Quora
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During a car crash, why are airbags useful? 0.They decrease the amount of impulse applied to the you.
Vera_Pavlovna [14]

Answer:

They increase the time it takes to slow you down, which decreases the force applied to you.

Explanation:

Hope it helps :)))

3 0
3 years ago
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The launch speed of a projectile is three times the speed it has at its maximum height.what is the elevation angle at launch?
Sphinxa [80]

Answer:

Given: a projectile of initial launch velocity(V) and launch angle ∅ and no air resistance. At the maximum height, the projectile would have a zero contribution of speed from the vertical component(Vy) Therefore, if we say Vx=Vcos∅ is the only speed the projectile has at the instant of maximum height then we can replace Vx with 1/5V and write 1/5V=Vcos∅. Solving for the the launch angle ∅, gives Inverse Cos(1/5)=78.5 degrees.

6 0
3 years ago
What percentage of the nations demand for electricity could be produce in the future by wind energy?
Furkat [3]

In the future ? Well, there's no technological reason why it couldn't be 100%.

8 0
3 years ago
Another word for stored energy is <br> 1 potential <br> 2 kinetic
scoray [572]

Answer:

Potential

Explanation:

Potential energy is the energy stored while kinetic energy is motional energy.

Potential itself means "having capacity/energy".

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
8 0
3 years ago
A 20-lb force acts to the west while an 80-lb force acts 45° east of north. The magnitu 80 lb 70 lb 067 lb 100 lb
olga55 [171]

Answer:

  • The magnitude of the resulting force is 67 lbf.

Explanation:

Taking the east as the positive x direction, and the north as the positive y direction.

The first force points west, this is, in the direction of -\hat{i}, so, is

\vec{F}_1 = - 20 \ lbf \ \hat{j}

\vec{F}_1 = (0 , - 20 \ lbf \)

For the second force, knowing the magnitude and directions relative to the x axis, we can find Cartesian representation of the vectors using the formula

\ \vec{A} = | \vec{A} | \ ( \ cos(\theta) \ , \ sin (\theta) \ )

where | \vec{A} | is the magnitude of the vector and θ the angle with the positive x direction.

So, the second force is

\vec{F}_2 = 80 \ lbf \ \ ( \ cos(45 \°) \ , \ sin (45 \°) \ )

\vec{F}_2 = ( \ 56.5685 \ lbf \ , \ 56.5685 \ lbf \ )

The net force will be :

\vec{F}_{net} = \vec{F}_1 + \vec{F}_2

\vec{F}_{net} = (0 , - 20 \ lbf \) + ( \ 56.5685 \ lbf \ , \ 56.5685 \ lbf \ )

\vec{F}_{net} =  ( \ 56.5685 \ lbf \ , \ 56.5685 \ lbf \ - 20 \ lbf  )

\vec{F}_{net} =  ( \ 56.5685 \ lbf \ , \ 36.5685 \ lbf \  )

To obtain the magnitude, we can use the Pythagorean Theorem

|\vec{F}_{net}| = \sqrt{F_{net_x}^2 +F_{net_y}^2}

|\vec{F}_{net}| = \sqrt{( \ 56.5685 \ lbf \ )^2 +( \ 36.5685 \ lbf \ )^2}

|\vec{F}_{net}| = 67.36 \ lbf

And this is the magnitude we are looking for.

8 0
3 years ago
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