Answer:
356 000 J
Explanation:
Total Energy released
= Energy released when water cools to 0 + Energy released when water is converted to ice at 0
= mcT + ml
= (0.5)(4200)(90-0) + (0.5)(334 000)
= 189 000 J + 167 000 J
= <u>3</u><u>5</u><u>6</u><u> </u><u>0</u><u>0</u><u>0</u><u> </u><u>J</u>
Answer;
All the above
Explanation;
The element carbon is the most important chemical constituent of many organic matter, ranging from fossil fuels to complex molecules such as DNA and RNA, that control genetic reproduction in organisms.
This element is found stored in major sinks found on the earth;
- as organic molecules in living and dead organisms found in the biosphere;
- as the gas carbon dioxide in the atmosphere;
- as organic matter in soils;
- in the lithosphere as fossil fuels and sedimentary rock deposits in the oceans as dissolved atmospheric carbon dioxide and
- as calcium carbonate shells in marine organisms.
Answer:
The amplitude decreases
Explanation:
From the inverse square law, we know that;
I ∝ 1/d²
Where;
I is intensity
d is distance
Also, we know that;
A² ∝ I
Where A is amplitude
Thus, we can say that;
A ∝ 1/d²
Thus, amplitude is inversely proportional to the distance.
So the larger the distance, the lesser the amplitude and the lesser the distance, the higher the amplitude.
Thus, as you move farther from the speaker the distance increases and therefore the amplitude decreases
Answer:
g' = 0.31 m/s²
Explanation:
First we need to find the length of pendulum, by using the formula of the time period of pendulum:
T = 2π√(L/g)
L = T²g/4π²
where,
L = Length of Pendulum = ?
T = Time Period of Pendulum on Earth = 2 s
g = acceleration due to gravity on Earth = 9.8 m/s²
Therefore,
L = (2 s)²(9.8 m/s²)/4π²
L = 0.99 m
Now, we use the formula on asteroid:
T' = 2π√(L/g')
where,
T' = Time Period on Asteroid = 11.3 s
g' = acceleration due to gravity on asteroid = ?
Therefore,
11.3 s = 2π √(0.99 m/g')
(11.3 s)² = 4π²(0.99 m/g')
g' = 39.2 m/(11.3 s)²
<u>g' = 0.31 m/s²</u>
