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2 A tunnelling machine drills 500 metres. Use your values from the
table to estimate the cost of drilling if the first metre costs £X and
each extra met
re costs £Y.
x=17
y=272
write a c++ programe which calculates sum of each column and row separately .for this, first create a 2D array 3 rows , 5 columns and then ask the user to input values in the array . after that , first calculate sum of each row separately and display that sum. then calculate sum of each column separatel and display that sum on the screen. to achieve such output , ou need to follow the following instructions?
In an aqueous solution at 25°C, if [H₃O⁺] = 2.4 × 10⁻⁴ M, then [OH⁻] is:
"An electrical firm produces light bulbs that have a length of life that is approximately normally distributed with a mean of 680 hours and a population standard deviation of 26 hours. A new version of light bulbs is being produced and is assumed to be better than the previous version. To test this claim, a random sample of 93 new light bulbs are tested. Would you agree with this claim if the random sample showed an average of 920 hours? Use a 0.1 level of significance.
What are the given? Write only the number. :
population mean: Blank 1 hours
population standard deviation: Blank 2 hours
sample size: Blank 3
sample mean: Blank 4 hours
level of significance: Blank 5
What is the critical value?
z: Blank 6
What is the value of the calculated z? Round your answer to the nearest hundredths.
z: Blank 7"
A copper wire has a resistance of 15.0 at a temperature of 14 degrees * C . After a current passes through the windings, the resistance rose to 22.5 ohms. To what temperature was the wire heated?
Investigate the following:
1. The spontaneity of a process based on entropy.
2. Determine whether entropy increases or decreases if the temperature, the phase, and the number of particles are changed.
3. Explain the second law of thermodynamics and its significance
4. How to use Gibbs free energy to determine the direction of a reaction.
5. State the importance of conversation of energy.
6. Explain the influence of energy change, energy trasformation, and energy utilization to the environment and on Earth as a whole.
1.CO reacts with Cl2 to form phosgene (COCl2), a nerve gas used during World War I. (12 points)
〖Cl〗_(2(g))↔2〖Cl〗_((g)) fast
〖CO〗_((g))+〖Cl〗_((g))→〖COCl〗_((g)) slow
〖COCl〗_((g))+〖Cl〗_((g))→〖COCl〗_(2(g)) fast
(a) Determine the overall reation.
(b) Write the rate law expression for each elementary reaction.
(c) Identify any intermediates.
(d) Determine the overall rate law expression.
2.For each of the following elementary reactions, write the rate equation and molecularity:
2NO+H_2→N_2+H_2 O
P〖Cl〗_3+〖Cl〗_2→〖PCl〗_5
Reaction Mechanism Problem:
The following pair of elementary reactions occur when atomic chlorine in the environment reacts with ozone: (12 points)
Cl+O_(3(g))→〖ClO〗_((g))+O_(2(g)) fast
〖ClO〗_((g) )+O→〖Cl〗_((g))+O_(2(g)) slow
Determine the overall reaction.
Write the rate law expression for each elementary reaction.
Identify any intermediates.
Determine the overall rate law expression.
The following equation describes how nitrogen(II) oxide, NO, reacts with hydrogen, H2: (12 points)
2NO+H_2→N_2+H_2 O_2 slow
H_2 O_2+H_2→2H_2 O fast
Determine the overall reation.
Write the rate law expression for each elementary reaction.
Identify any intermediates.
Determine the overall rate law expression.
There is an upsurge in the temperature and due to this heat shock, what will happen to the market for lemon soda in the Mianwali.
let x be a binomial random variable. use the formula to compute the following probabilities;
(a) p(x=2), if n=8 and p=0.1
(b) p(x=5), if n=9 and p=0.5
(c) p(x=9), if n=10 and p=0.95
#340153 on Dec 2023