Answer: A.
Explanation:
Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height).
Weight= Mass
Height= Height
Hope this helps!
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Answer:
C5H10O5
Explanation:
The molecular formula is a multiple of the empirical formula. I.e
Molecular formula => [CH2O]n
[CH2O]n = 150
[12 + (2x1) + 16 ]n = 150
30n = 150
Divide both side by the coefficient of n i.e 30
n = 150/30 = 5
Molecular formula => [CH2O]n
Molecular formula => [CH2O]5
Molecular formula => C5H10O5
The human body<span> contains </span>many<span> salts, of which </span>sodium<span> chloride NaCl is the major one, making up around 0.4 per cent of the </span>body's<span> weight. So a 50kg</span>person<span> would contain around 200g of </span>sodium<span> chloride - around 40 teaspoons. Since we lose </span>salt<span> whenever we sweat, it has to be continually replaced. Answer: C.</span>
Start by balancing elements that don’t appear in single form. So, for number 4
Start by adding 2 to Cu2O to balance the oxygen
2Cu2O + C —-> Cu + CO2
Now the oxygen is balanced, but the Cu is not. This can now simply be mitigated by adding 2 to the single Cu
2Cu2O + C —-> 2Cu + CO2
That’s your final answer for #4
