A moving company is called into a building and asked to relocate 520 bricks to a location 15 meters above the ground. If each brick is 4 kilograms, what amount of work will be needed to accomplish the task? A. 305,760 J B. 229,320 J C. 203,840 J D. 588,000 J
Answers
Work to lift 1 brick:
W = mgh = (4 kg)(9.8 m/s²)(15 m) = 588 J
Work to lift 520 bricks:
W = 520(588 J) = 305,760 J
I just took the test, the answer is A. 305,760 J, good luck.
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it's core charge would be +3
Explanation:
it's core charge would be +3
Explanation:
Answers
When you are discussing the concentration of solution, you are discussing how many particles there are in a given amount of solvent. You are comparing. If there is more solute in a beaker of solvent, then it is highly concentrated. If there is less solute in a beaker of the same amount of solvent, then it is less concentrated or more dilute. The terms diluted and concentrated are related to each other. These words are used to compare certain solutions to each other, since there is nothing like numbers, these words are relative to one another.
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150ml .........60 minute
x ........... 1 minute
x = 150ml× 1 minute / 60 minute
x = 2.5ml
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it is known that the client receives 150ml of the solution for over an hour.convert the hour into minutes,then we do not know how much liquid a client receives in a minute. we cross multiple the values to get the value in ml. for every one minute the client receives 2.5ml of the fluid.
Answers
Answer : The moles ratio between the nitrogen gas and hydrogen gas are, 1 : 3 respectively.
Explanation :
The balanced chemical reaction will be,
Mole ratio : It is defined as the ratio of the number of moles of the substances whose ratio is to be calculated.
In a chemical reaction, the stoichiometric coefficients represents the number of moles.
By stoichiometry of the reaction we can say that,
1 mole of nitrogen gas reacts with 3 moles of hydrogen gas to produce 2 moles of ammonia gas.
Hence, the mole ratio of between the nitrogen gas and hydrogen gas are, 1 : 3 respectively.
For instance you have a chemical reaction of N2 + 3H2 -> 2NH3. The number of moles of N2 is 1, H2 is 3 and NH3 is 2. The mole to mole ratio between nitrogen gas and hydrogen gas is 1/3 or 1 is to 3.
Answers
Answer:
The reaction rate will be multiplied by four.
Explanation:
The reaction rate is the measure of how fast a reaction is happening, and it can be calculated by how fast the reactants are disappearing, or how fast the products are being formed.
For a generic reaction:
A → B + C
The rate (r) is:
-r = k*[A]ⁿ
The minus signal refers to the disappearing of the reactant, k is the velocity constant of the reaction, and n is the reaction order. So, for a second-order reaction:
-r = k*[A]²
If the concentration of A is doubled: [A]' = 2[A]
-r' = k*(2[A])²
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-r' = 4*(-r)