Which simple machine is a doorknob?

A long string carries a wave; a 6.00-m segment of the string contains four complete wavelengths and has a mass of 180g. The stri

Viktor [21]

A long string carries the wave; a segment of the string measuring 6.00 meters in length and weighing 180 grams contains four full wavelengths. The string vibrates sinusoidally at a 50.0 Hz frequency with a 15.0 cm peak-to-valley displacement. The vertical distance between the farthest positive and negative positions is known as the "peak-to-valley" distance. The function that describes this wave traveling in the positive x direction is $y=(7.50 \mathrm{~cm}) \sin \left(\frac{4 \pi}{3} \times-314 t+\phi\right)$ .

$\begin{aligned}& f=500 \mathrm{~Hz} \\&\mu=\frac{180 \times 10^{-3}}{6}=3 \times 10^{-2} K g / m \\&2 A=15 \times 10^{-2} m \\&A=7.5 \times 10^{-2} m \\&4 \lambda=6, \lambda=3 / 2 m \text {. and } v=f \lambda=75 m / \mathrm{sec} \\&\omega=2 \pi f=100 \pi \text { also } K=\frac{\omega}{v}=\frac{4 \pi}{3}\end{aligned}$

If phase constant is $\phi$ then

$\therefore$ equation is $y=7.5 \times 10^{-2} \sin \left[100 \pi t-\frac{4 \pi}{3} x+\phi\right]$

∴ equation is $y=(7.50 \mathrm{~cm}) \sin \left(\frac{4 \pi}{3} \times-314 t+\phi\right)$

A wave is a disturbance that moves from one location to another, carrying energy but not always matter.
The square of the equation provides a probability density map of the locations where an electron has a specific statistical likelihood to be at any given moment in time. Wave functions have no direct physical meaning.

To know more about Wave functions visit : brainly.com/question/3639648

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8 0

1 year ago

A 6.20 g bullet moving at 929 m/s strikes a 850 g wooden block at rest on a frictionless surface. The bullet emerges, traveling

nekit [7.7K]

Answer:

(a) Final speed of block = 3.2896 m/s

(b) 6.7350 m/s is the speed of the bullet-block center of mass?

Explanation:

Given that:

Mass of bullet (m₁) = 6.20 g

Initial Speed of bullet (u₁) = 929 m/s

Final speed of bullet (v₁) = 478 m/s

Mass of wooden block (m₂) = 850g

Initial speed of block initial (u₂) = 0 m/s

Final speed of block (v₂) = ?

By the law of conservation of momentum as:

m₁×u₁ + m₂×u₂ = m₁×v₁ + m₂×v₂

6.20×929 + 850×0 = 6.20×478 + 850×v₂

Solving for v₂, we get:

v₂ = 3.2896 m/s

Let the V be the speed of the bullet-block center of mass. So,

V = [m₁* u₁]/[m₁ + m₂] (p before collision = p after collision)

= [6.2 *929]/[5.2+850]

V = 6.7350 m/s

7 0

3 years ago

Why do you think the cup that is exposed to more air has water outside it?

mylen [45]

It's called condensation. That is what that wetness on the outside of the cup is.

6 0

3 years ago

In a given lightning flash, the potential difference between a cloud and the ground is 2.86 times 109 V and the quantity of char

Nadya [2.5K]

Answer:

Explanation:

decrease in energy of the transferred charge

= Voltage x charge

= 2.86 x 10⁹ x 23.1

= 66.067 x 10⁹ J

the final speed of the automobile be V

1/2 m v² = 66.067 x 10⁹

v² = 66.067 x 10⁹ x 2 / 1519

= .08698 x10⁹

= 87 x 10⁶

v = 9.32 x 10³ m / s

3 0

3 years ago

What is not changed when work is done by a machine?

Irina18 [472]

B) The amount of work done

8 0

3 years ago

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