Physics, 02.12.2019 21:31 bobk1433

Apiston above a liquid in a closed container has an area of 1m2. the piston carries a load of 350 kg. what will be the external pressure on the upper surface of the liquid?

a. 27.3 kpa
b. 3.43 kpa
c. 4.90 kpa
d. 68.6 kpa

Answers: 1

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Answer from: alienfacetimelol

Answer;

B. 3.43 kPa

Explanation;

Pressure is given by the formula;

Pressure = Force / Area

Force is the product of mass and acceleration due to gravity.

Thus; Force = mass x acceleration due to gravity

Substituting;

Force = (350 kg) x (9.8 m/s²)

Force = 3430 N

Then, using the first equation;

Pressure = 3430 N / 1m² or Pa

= 3.43 kPa

Answer from: Quest

1.the balanced chemical equation is as below

cu + 2 ag(no)₃ → cu(no₃)₂ +2 ag

2.the much silver produced is 50.9 g

step 1: find the moles of cu

moles = mass÷ molar mass

from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236 moles

step 2: use the mole ratio to determine the moles of ag

from equation above cu: ag is 1: 2

therefore the moles of ag =0.236 moles x 2/1 =0.472 moles

step 3: find the mass of ag

mass = moles x molar mass

from periodic table the molar mass of ag =107.87 g/mol

mass = 0.472 moles x 107.87 g/mol = 50.9 g

3. the much silver collected worth is 1.797 oz

convert 50.9 g to oz

that is 1 gram = 0.0353 oz

50.9 grams =? oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1 gram} =1.797 oz

Answer from: Quest

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation

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Apiston above a liquid in a closed container has an area of 1m2. the piston carries a load of 350 kg...

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