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Anon25 [30]
3 years ago
12

Three children are playing in a pool in the back yard. One child is at the far left end of the pool and is splashing. A second c

hild is laying on a float in the middle of the pool. The third child is at the far right of the pool and begins splashing as well. The child on the float in the middle of the pool notices that when both of her friends are splashing on opposite sides of the pool, she is raised much higher on her float as the waves lift her up. What phenomenon is the child in the middle of the pool experiencing?
A) Doppler effect
B) Seismic impact
C) Destructive interference
D) Constructive interference
Chemistry
2 answers:
torisob [31]3 years ago
6 0

The answer is; D

When both kids splash at both ends of the pool, the waves formed from the different direction travel and meet in the middle of the pool (since they are traveling with the same speed). When the waves meet, they interact and form constructive waves. This means that when a crest meets a crest, the height doubles. This also occurs for the troughs. Therefore the sizes of the waves at the middle are twice the individual waves.

Vika [28.1K]3 years ago
5 0

Answer:

d)

Explanation:

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A 400. 0 g sample of liquid water is at 30. 0 ºc. how many joules of energy are required to raise the temperature of the water t
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Energy required to raise the temperature from 35°C - 45 °C= 25116 J.

specific heat, the quantity of warmth required to raise the temperature of one gram of a substance by means of one Celsius degree. The units of precise warmth are generally energy or joules consistent with gram according to Celsius diploma. for instance, the unique warmth of water is 1 calorie (or 4.186 joules) according to gram in step with Celsius degree.

solving,

Sample of liquid = 400. 0 g

temperature = 30. 0 ºc

joules of energy are required to raise the temperature of the water to 45. 0 ºc

therefore rise in temperature 45 - 30 = 15°C

Specific heat capacity = 4.186 J/g m °C

In kelvin = 273 + 15 = 288

          = ∴ energy required = Q = m s ( t final - t initial)

            =  400*4.186 * 15

           = 25116 joule

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What is the oxidation number of chromium in dichromate ion, cr2o72-?
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