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Kelvin

Questions and answers by visitors named Kelvin

Questions (244)

the points a, b and c have position vectors a 2i + j - k, b = 3i + 4j - 2k and c = 5i - j + 2k respectively relative to a fixed
1. 2 answers
2. 132 views
In the process called fluorescence, some substances absorb photons of one kind of radiation (e.g) ultraviolet radiation), and
1. 1 answer
2. 1,045 views
Hi there!Can you tell me about history of China and/or its economy? What is their current issue/political system? Can you
1. 2 answers
2. 496 views
"Hi there!Can you tell me about economics of China? Can you suggest any credible source that I can look up for those
1. 2 answers
2. 520 views
Hi there,What is the criticisms of advertising? Any sites that talk about the criticisms of advertising?
1. 2 answers
2. 505 views
For the reactionNO(g) + O3(g) „_ NO2(g) + O2(g) The frequency factor A is 8.7 X 1012 s-1 and the activation energy is
1. 2 answers
2. 840 views
This year my teacher read us the book The Phantom Tollbooth, and since then I've been having strange dreams about drving in
1. 2 answers
2. 583 views
Mr. Wilson and one man got on a streetcar. At the secong stop three people got on. At the third stop, three people got on and
1. 3 answers
2. 688 views
The senior class was being lined up by height-shortest to tallest- for the graduation ceremony. Bert is shorter than Phillip,
1. 2 answers
2. 659 views
The farmers boy is going to market again. This time he's taking his faithful dog, two geese,and three bags of corn. He again has
1. 3 answers
2. 365 views
a boat moves through still wather at x kilometers(km) per hour. it travels 24km up stream against a current of 2km per hour and
1. 2 answers
2. 502 views
a boat moves through still wather at x kilometers(km) per hour. it travels 24km up stream against a current of 2km per hour and
1. 2 answers
2. 785 views
If x represents the total number of bags a person checks and each person checks more than two bags, the equation below can be
1. 3 answers
2. 544 views
A store offers a 15% discount on all items in the store during a sale. All store employees get an additional 10% employee
1. 6 answers
2. 1,081 views
Maya and Sally were the two finalists in a singing competition. The person with the most votes from the audience was chosen as
1. 3 answers
2. 1,025 views
Maya and Sally were the two finalists in a singing competition. The person with the most votes from the audience was chosen as
1. 6 answers
2. 1,461 views
Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim
1. 3 answers
2. 421 views
Solve x: 2 over 5x+2=10
1. 1 answer
2. 260 views
Using complete sentences, explain how to graph y = x - 2 using the slope-intercept method.
1. 1 answer
2. 457 views
An ice cube is melting such that the side of the cube is decreasing at the rate of 1/4 t^2 cm / min. It is given that the side
1. 2 answers
2. 737 views
What representations do not change the location of the given point (7,140°)?
1. 2 answers
2. 529 views
What representations do not change the location of the given point (7,140°)?
1. 1 answer
2. 433 views
Find the area of a triangle with sides of length 5 and 8 and included angle 74°. (Round your answer to one decimal place.)
1. 4 answers
2. 1,254 views
Find the values of the trigonometric functions of è from the information given.(sin è, cos è, csc è, sec è, cot è) tan è
1. 1 answer
2. 500 views
Evaluate the following as true or false. If the Earth shrank in size, but all other factors remained the same, all of its
1. 3 answers
2. 431 views
For which of the following situations can the equation F = mg not be used to calculate the force due to gravity?a) The pull of
1. 2 answers
2. 1,049 views
In order for a satellite in free fall to maintain uniform circular motion, ______________.a) there must be a tangential
1. 1 answer
2. 356 views
(x^2+y^2)^2=4(x^2-y^2)Equation of a lemniscate curve
1. 3 answers
2. 442 views
A Question of engineering about Sound. How to calculate in step by step? Thank you.The octave bands¡¦ Sound pressure levels in
1. 1 answer
2. 337 views
54% of the children in a large city are boys. Using a suitable approximation, calculate the probability that a random sample of
1. 1 answer
2. 474 views
A machine produces ribbon in which flaws occur randomly at an average rate of one flaw in 100m. Find the probability that there
1. 2 answers
2. 560 views
How many grams of Ag2CO3 will precipitate when excess K2CO3 solution is added to 70.0 mL of 0.692 M AgNO3 solution?2AgNO3(aq) +
1. 3 answers
2. 3,468 views
A 58 kg woman is ice-skating toward the east on a frictionless frozen lake when she collides with a 94 kg man who is ice-skating
1. 3 answers
2. 1,048 views
(1) A cone has height of 8cm and circular radius 6cm calculate (a) It's Volume (b) It's Slant Height (c) The Curved Surface Area
1. 2 answers
2. 1,030 views
Brianna is a flight student and is in the process of acquiring her private license in a Solo flight she uses a single engine
1. 1 answer
2. 452 views
The molar enthalpy of combustion of demand is -6.78KJ/mol.What mass of decane would have to be burned in order to raise the
1. 2 answers
2. 562 views
What are answers to week 26 for forth grade
1. 4 answers
2. 464 views
If 8A pass for 2minutes at the cathode(where the following reaction takes place, Ag+ + e- --->Ag) how many grams of silver metal
1. 1 answer
2. 353 views
Identify and explain four types of risk behavior amongst teenagers by means of examples
1. 3 answers
2. 579 views
function of liver
1. 3 answers
2. 347 views
name and explain the laws that protect the citizens against xenophobia
1. 3 answers
2. 912 views
Two towns P and Q lie on the same parallel latitude such that P is due east of Q. When local time at Q is 9.50am , the local
1. 4 answers
2. 785 views
Which of the following is a requirement for naturalization in the United States
1. 3 answers
2. 377 views
If 197.1 mL of SO3 is collected (measured at 324 K and 52.6 mmHg) what is the percent yield of the reaction?
1. 1 answer
2. 327 views
The sum of two numbers exceeds their product by one.Their difference is equal to their product less five. Find the two numbers.
1. 4 answers
2. 917 views
the longest side of a triangle measure 267m.If two angles 37 and 48 what is the shortest side and it angle
1. 4 answers
2. 517 views
Length of an elastic cord when 2.8N is applied
1. 1 answer
2. 164 views
i am the last animal poem ?
1. 1 answer
2. 150 views
Simplify 8√5
1. 1 answer
2. 235 views
The travel timetable below shows the departure and arrival timer for a bus flying between two towns M and R,300km apart Town M
1. 1 answer
2. 296 views
Log(x^2-x+2) base 2=1+2logx.... solve for x
1. 1 answer
2. 184 views
You are principal speaker in school debate on the motion.boys and girls should be assigned equal work at home .write your entry
1. 3 answers
2. 270 views
You are principal speaker in school debate on the motion.boys and girls should be assigned equal work at home .write your entry
1. 4 answers
2. 165 views
4 reason youth do not want to participate in civic life
1. 1 answer
2. 69 views
Please anyone to assist about this problemBy using hyperbolic substitution integrate sqrt (9 - x^2)
1. 1 answer
2. 102 views
Dear guys, kindly help me,outline 5 common methods which can be used to determine density or specific gravity of liquid
1. 1 answer
2. 21 views
Hello people, Kindly help me.Give in details procedures of determining molarity of mass percentage liquid and it's density
1. 1 answer
2. 40 views
Spark on the presence of flammable liquids may lead explosion, hence flammable liquid containers should be well stored/ handled
1. 1 answer
2. 80 views
Outline five common sources of radiation in laboratory
1. 1 answer
2. 24 views
Outline two common sources of radiation in laboratory.
1. 1 answer
2. 25 views
Mentions ways to reduce accidents in the laboratory
1. 1 answer
2. 42 views
How do we measure solubility of substance in laboratory
1. 1 answer
2. 22 views
Factors affecting solubility
1. 1 answer
2. 50 views
Methods of water treatment
1. 1 answer
2. 19 views
Difference between second and third law of thermodynamic
1. 1 answer
2. 38 views
State first law of thermodynamic and their daily applications
1. 1 answer
2. 42 views
State second law of thermodynamic and their daily applications
1. 1 answer
2. 44 views
State third law of thermodynamic and their daily applications
1. 1 answer
2. 40 views
Explain the forces acting on solute and stationary support in adsorption chromatography
1. 1 answer
2. 37 views
Types of chromatography
1. 1 answer
2. 75 views
Outline separation techniques with their principles
1. 1 answer
2. 45 views
Give details procedures to prepare sample for analysis
1. 1 answer
2. 34 views
Give details procedures to prepare stock solution
1. 1 answer
2. 46 views
Give details procedures how to prepare a working solution from stock solution
1. 1 answer
2. 40 views
Forces that act on solute and stationary phase in adsorption chromatography
1. 1 answer
2. 34 views
Analytical techniques in chemistry
1. 1 answer
2. 47 views
Types of titration
1. 1 answer
2. 20 views
Data collected in ethnographic research
1. 1 answer
2. 43 views
laboratory chemistry scientists might be asked sources of radiation then what other questions may be asked in written interview
1. 1 answer
2. 93 views
What are the questions might be asked for a position in the university for laboratory chemistry scientists
1. 1 answer
2. 65 views
What are the written questions might be asked for a position in the university for laboratory chemistry scientists
1. 1 answer
2. 115 views
What are the written interview questions might be asked for a position in the university for laboratory chemist
1. 1 answer
2. 51 views
What are the written interview questions might be asked for a position in the university/college for laboratory supervisor
1. 1 answer
2. 57 views
What are the written interview questions might be asked for a position in the university/college for laboratory supervisor like
1. 1 answer
2. 55 views
as laboratory chemistry scientists what kind of physical chemistry questions you may ask to the students
1. 1 answer
2. 52 views
Discuss the principles of spectroscopy and its role in identifying chemical compounds.
1. 1 answer
2. 26 views
Discuss the principles of chromatography and its applications in separation and analysis
1. 1 answer
2. 45 views
How do you handle and expose hazardous waste materials in laboratory
1. 1 answer
2. 50 views
Difference between entropy and enthlapy
1. 1 answer
2. 24 views
How do you determine molarity experimentally
1. 1 answer
2. 28 views
How do you determine molarity from titration
1. 1 answer
2. 21 views
How would you determine vapour pressure of liquid components
1. 1 answer
2. 28 views
Types of indicators
1. 1 answer
2. 36 views
Types of indicators used in titration
1. 1 answer
2. 33 views
Research methods
1. 1 answer
2. 21 views
How do phenolphthalein, bromothymol and methyl orange behave in acid base titration
1. 1 answer
2. 52 views
Types of research
1. 1 answer
2. 29 views
Discrete variable
1. 1 answer
2. 22 views
Independent variables
1. 1 answer
2. 23 views
Controlled variables
1. 1 answer
2. 38 views

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