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prohojiy [21]
3 years ago
8

A(n)... is a material that takes in a wave when the wave hits it

Physics
1 answer:
pentagon [3]3 years ago
5 0
Absorber, it absorbs the light, like a black shirt is an absorber.. 
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A certain microwave has a
Tatiana [17]

Answer:

9.375\times 10^{9} Hz

Explanation:

Frequency is mathematically defined as the quotient of speed divided by wavelength.

Frequency= \frac {v}{W}

where

v-is the speed of light

-w is wavelength.

Given the speed of the wave  as V=300000000 \ m/s and the wavelength \lambda= 0.032\ m, we substitute these values in the Frequency function to solve for frequency:

Frequency=\frac {300000000}{0.032}=9375000000 Hz=9.375\times 10^{9} Hz

Hence, the wave's frequency is 9.375\times 10^9\ Hz

5 0
3 years ago
What is the acceleration of a racing car if it's speed is increased uniformly from 44 m /s to 66 m / s over an 11 second period
jolli1 [7]

Answer:

the acceleration of the race car is 2 m/s²

Explanation:

Given;

initial velocity of the race car, u = 44 m/s

final velocity of the race car, v = 66 m/s

time of motion of the race car, t = 11 s

The acceleration of the race car is  calculated as;

a = \frac{v-u}{t} \\\\a = \frac{66-44}{11} \\\\a = 2 \ m/s^2

Therefore, the acceleration of the race car is 2 m/s²

7 0
2 years ago
How many photons with 10 ev are required to produce 20 joules of energy?
oee [108]
One electron Volt (eV) is equal to 1.6 x 10^-19 Joules. Therefore, 10 eV is equal to 1.6 x 10^-18 Joules. In order to produce 20 Joules of energy from 10 eV photons, we would require 20 x 1/(1.6  x 10^-18) = 1.25 x 10^19 particles. This demonstrates that in the world of particle physics, the Joule is a massive energy unit relative to the commonly used electron Volt. 
6 0
3 years ago
Name one thing that causes domains of a magnets atoms to lose alignment
kogti [31]
Heat cause domains of magnets atoms to lose alignment
7 0
3 years ago
Read 2 more answers
Pressing two objects together with more force __________ friction
AysviL [449]
Pressing two objects together with more force Increase friction
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3 years ago
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