<span> elevation between index contours would be </span><span>125 feet</span>
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Answer:
d = endothermic
Explanation:
Chemical equation:
2CO₂ → 2CO + O₂
When carbon dioxide form carbon monoxide and oxygen the ΔH is +570KJ.
When enthalpy of reaction is positive and ΔH is greater than zero it means heat is given to the reaction.
It is called endothermic reaction.
In this case enthalpy of product is higher than enthalpy of reactant
When enthalpy of reaction is negative and ΔH is less than zero it means heat is released during the reaction.
It is called exothermic reaction.
In this case enthalpy of product is lower than enthalpy of reactant.
Answer : The answer in standard form is, 0.00318 mg.
Explanation :
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
As we are given :
First we have to convert scientific notation into standard form.
As per rule, the least precise number present after the decimal point is 5. So, the answer will be, 0.00318 mg.
Answer:
The answer to the question is
The resultant ground reaction force exerted by the floor on the volleyball player's shoes = 2088.06 N
Explanation:
To solve the queston we list out the variables thus
Mass of volley ball player = 80 kg
Normal force exerted on her shoes by the floor N =2000 N
friction force, f, exerted on her shoes backwards = 600 N
The resultant ground reactive force, R, is given by
R² = N² + f² = 2000² + 600² = 4000000 + 360000 = 4360000
Therefore R = √(4360000) = 2088.06 N
The direction of the force = atan (2000/600) = 73.3 ° clocwise or 106.699 ° counter clockwise