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3 years ago

9

As a wave travels through a medium, it displaces particles in a direction parallel to the motion of the wave. We can conclude th

is is a

1 answer:

Gre4nikov [31]3 years ago

5 0

Transvere wave because the direction which the particles are being displaced

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Microwave ovens emit microwave energy with a wavelength of 12.1 cm. What is the energy of exactly one photon of this microwave r

EastWind [94]

Answer:

$1.64\cdot 10^{-24}J$

Explanation:

The energy of a photon is given by:

$E=\frac{hc}{\lambda}$

where

$h=6.63\cdot 10^{-34} Js$ is the Planck constant

$c=3\cdot 10^8 m/s$ is the speed of light

$\lambda$ is the wavelenght of the photon

For the microwave photons in this problem,

$\lambda=12.1 cm=0.121 m$

so their energy is

$E=\frac{(6.63\cdot 10^{-34}Js)(3\cdot 10^8 m/s)}{0.121 m}=1.64\cdot 10^{-24}J$

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2 years ago

To determine the trajectory of the movement of a material point in the xOz plane that is subjected simultaneously to oscillation

nasty-shy [4]

We are to show that the given parametric curve is a circle.

The trajectory of a circle with a radius r will satisfy the following relationship:

$(x-x_c)^2 + (y-y_c)^2 = r^2$

(with (x_c,y_c) being the center point)

We are given the x and y in a parametric form which can be further rewritten (using properties of sin/cos):

$x(t) = A\sin \pi(t+1) = A\sin (\pi t + \pi) = -A\sin \pi t\\y(t) = A\sin (\pi t + \frac{\pi}{2}) = A\cos \pi t$

Squaring and adding both gives:

$x^2(t) + y^2(t) = A^2(-1)^2\sin^2 \pi t + A^2 \cos^2 \pi t = A^2\\\implies x^2 + y^2 = A^2$

The last expression shows that the given parametric curve is a circle with the center (0,0) and radius A.

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2 years ago

Question 13 (1 point)

Leviafan [203]

Answer:

papa's donuteria

Explanation:

:rawr:

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2 years ago

Which of these does NOT use a reed?<br> O Flute<br> Clarinet<br> Oboe<br> Bassoon

Lemur [1.5K]

Flute~~~~~~~~~~~~~~~~~~~

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1 year ago

Read 2 more answers

Humans start from a single cell. Eventually, as cells divide, they start to differentiate, or specialize. Some cells are special

Margaret [11]

Answer:

interphase im sure

Explanation:

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2 years ago