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3 years ago

Hellllppppppp please

Physics

1 answer:

WITCHER [35]3 years ago

3 0

I hope that helps! Let me know if you need any more help!

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If the kinetic energy of a particle is doubled, by what factor has its speed increased?

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<span> velocity increases by √3</span>

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4 years ago

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A busy waitress slides a plate of apple pie along a counter to a hungry customer sitting near the

Ostrovityanka [42]

Answer:

a. 0.5307 sec

b. 0.4458 m

c. = $v_x=0.84\ m/s\ ,\ v_y=5.2\ m/s$

Explanation:

Horizontal Motion

It describes the dynamics of an object thrown horizontally in free air. The initial horizontal velocity is maintained all the time since no horizontal forces are acting. The initial vertical velocity is zero at launch time, but it grows downwards powered by the acceleration of gravity.

The object hits the ground at a distance x from the point of launching, after having traveled a vertical distance $y_o$ , taking a time t to complete the travel. The formulas who relate the different magnitudes are

$v_x=v_o$

The horizontal velocity $v_x$ is the same regardless of the elapsed time

$v_y=gt$

$x=v_ot$

$\displaystyle y=y_o-\frac{gt^2}{2}$

The plate of apple pie left the counter at a speed

$v_o=0.84\ m/s$

The counter is $y_o=1.38\ m$ high.

Knowing that

$y_o=1.38\ m$

We use this formula to compute t

$\displaystyle y=y_o-\frac{gt^2}{2}$

At the moment when the plate hits the floor y=0

$\displaystyle 0=y_o-\frac{gt^2}{2}$

$\displaystyle y_o=\frac{gt^2}{2}$

Solving for t

$\displaystyle t=\sqrt{\frac{2y_o}{g}}$

$\displaystyle t=\sqrt{\frac{2(1.38)}{9.8}}$

$t=0.5307\ sec$

$x=(0.84)(0.5307)$

$x=0.4458\ m$

$v_x=0.84\ m/s$

$v_y=(9.8)(0.5307)$

$v_y=5.2\ m/s$

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4 years ago

What is the wavelength of an electromagnetic wave?

gizmo_the_mogwai [7]

Answer: (A) The number of waves that pass a point in a certain amount of time.

Explanation:

Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f. Visible light has a wavelength range from ~400 nm to ~700 nm.

Frequency: Is the number of waves that pass a certain point in a specified amount of time.

Trough: The low point of the wave cycle.

Wavelength: The distance between two successive peaks.

Electromagnetic wave: One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity.

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2 years ago

a water pump takes water through 12m. Water is discharged at the surface at the rate of 2Kg/s, and the discharge speed of each d

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Answer:

Explanation:

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3 years ago

All digits shown on the measuring device, plus one estimated digit are considered____

erastovalidia [21]

I think the answer is significant

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3 years ago