Wednesday

January 18, 2017
Total # Posts: 164

**chemistry**

how many unpaired electrons are in this configuration 1s2 2s2 2p6 3s2 3p3

*January 18, 2017*

**chemistry**

how many unpeeled electrons are in this configuration 1s2 2s2 2p6 3s2 3p3

*January 18, 2017*

**Science **

What is the effect on molarity for NaOH when balance used to weigh KHP is not properly calibrated and always reads 0.15 g too low.

*January 7, 2017*

**maruco**

The electrons in the d–orbitals – are they from the metal or the ligands.why?

*December 26, 2016*

**marian university college**

The molar constant-pressure heat capacity of a certain solid at 4.2 K is 0.43 J K?1 mol?1. What is its molar entropy at that temperature?

*December 12, 2016*

**0.5mols of a monoalkanoicacid weighs 44 grams, determine the molecular formula and name the acid. (show the workings)**

0.5mols of a mono alkanoicacid weighs 44 grams, determine the molecular formula and name the acid. (show the workings)

*October 12, 2016*

**chemistry**

0.5mols of a mono alkanoicacid weighs 44 grams, determine the molecular formula and name the acid. (show the workings)

*October 12, 2016*

**maths**

Eric is twice as old as Ernest, who in turn is 5 years older than mike.if their total age is 47 years, how old is each of them?

*October 5, 2016*

**Mathematics**

A stick is 203cm long. The stick is cut into n pieces, each the same length. What is the length of each piece?

*September 4, 2016*

**Science**

The efficiency of a machine is 80%.calculate,the amount of energy needed by the machine to do work of 150joules.

*August 25, 2016*

**Physics**

A projectile leaves the ground at an angle of 60degree to the horizontal.it initial kinetic energy is E. Neglecting air resistance, it kinetic energy at the highest point of the motion is

*July 16, 2016*

**Physics**

A bullet is fired horizontally from the top of a cliff with a speed of 30m/s.assuming that there is no air resistance, what will be its speed 3sec later?

*July 15, 2016*

**PHYSICS**

A mass of 2kg is dropped from a height of 3m.Neglecting air resistance,KE of the stone just b4 it hits the ground is ?

*July 10, 2016*

**chemistry**

60 cm of hydrogen diffused through a porous membrane in 10 minutes. The same volume of gas G diffused through the same membrane in 37.4 minutes. Determine the relative molecular mass of

*June 30, 2016*

**science**

A block of wood is weighed on a beam balance.its mass is 54g.The density of the block is1.8g/cm`3.Find volume

*June 25, 2016*

**science**

A measuring cylinder contains 50cm`3 of water.A stone has a mass of 1.75g.The stone is lowered into the cylinder, the level of the water rises to 52.5cm`3.Calculate the density of the stone

*June 25, 2016*

**MATH**

FIND THE LENGTH OF AN ARC ANGLE IS 60 DEGREE AT THE CENTRE OF A CIRCLE OF RADIUS 3CENTIMETRE

*June 18, 2016*

**Maths**

A ladder leans against a vertical wall of height 12m.if the foot of the ladder is 5m away from the wall,calculate the length of the ladder.

*June 13, 2016*

**Maths**

A box contain 40 pens of equal sizes.10 of them are green and 18 are red.if a pen is chosen at random from the box,what is the probability that is neither green nor red? Soln total number of pens=40 number of green pens=10 number of red pens=18 number of other pen=? =10+18=28...

*June 13, 2016*

**science**

what is the length of a simple pendulum that has a period of 2.8 seconds (g=10)

*May 13, 2016*

**Mathematics**

. The three consecutive terms of an exponential sequence (G.P) are the second, third and sixth terms of a linear sequence (A.P). Find the common ratio of the exponential sequence.

*May 5, 2016*

**maths**

Find the median of 3,6,10,13, 14,17,19 and 22

*April 23, 2016*

**math**

Find the lenght of a rectangle if the perimeter is 48 and width is 8

*April 21, 2016*

**Further maths**

The first term of an AP is equal to thrice the common difference. What is the sixth term of the AP,if the common difference is 8

*April 19, 2016*

**Science**

its B

*April 4, 2016*

**Economics**

The answer of number one is 1.25

*March 31, 2016*

**algebra**

prove that if U and W are vector subspaces of a vector V, then UV, is a vector subspace of V

*March 22, 2016*

**algebra**

how can i proove that every vector norm on C subscript n is continuos in the vector components the set of complex numbers

*March 22, 2016*

**algebra**

let V=R^3 and S={e1,e2,e3}.prove that S is a basis of V

*March 22, 2016*

**algebra**

let V be set of all functions with down R which are such that f(t)=Acost +Bsin t,t c R, where A and B are real numbers. define addition in V by (f+g)(t)=f(t)+g(t) and scalar multiplication by (¥f)(t)=¥(f(t)),¥€R.prove that V is a vector space over R

*March 22, 2016*

**science**

3 identical point charges each one micro coulomb placed at vertices of an equilateral triangle 10cm apart calculate the force on each charge

*March 22, 2016*

**sequence help!!!!! plz steve,reiny,damon,bob...anyone!!!!**

find the expression in terms of n of the nth term of following squences 5,13,32,69,129,221....help plz show it work

*March 16, 2016*

**sequence....help!!!!!**

find an expression in terms n of the nth term of the following sequence 5,13,32,69,129,221......help

*March 15, 2016*

**chemistry**

Please I need a detailed explanation, am stuck doing this assignment, at what temperature in kelvin will co2 molecules have an rms speed equal to hydrogen at 20 Celsius?

*March 2, 2016*

**maths**

The position vector of m in the same plane are as the point a and b is given by m=1÷2(a+b).if the vector A(-4,-3),B(2,-1).What is the direction and the relationship of vector AM and vector BM

*February 4, 2016*

**anty alice**

graph of 5x-2y=6 value=0=2

*February 4, 2016*

**anty alice**

graph of 5x-2y=6 value 0=2

*February 4, 2016*

**Math**

Out of 300 student in final year in senior secondary school, 200 are offering biology and the150 offering chemistry how many are offering neither biology nor chemistry

*January 24, 2016*

**Word problem algebra**

Steve the builder was plastering a wall while standing on a ladder..he noticed that the number of rungs/steps below,the rung he was standing on was 1/3 of the numbers of rungs above where he was standing. Then he climed another 10 rungs/steps and he also notice that the number...

*January 18, 2016*

**Blessed lord sir steve i don't get it**

How did you come ot x/2=A?

*January 18, 2016*

**Trigonomentry help plz!!!**

Sin3A=3sinA-4sin(x/2)^3 find x interms of A? PLZ show working got no ideal at all

*January 18, 2016*

**Calculus help**

Y=|X^2+3x-4| find dy/dx?

*January 15, 2016*

**Math**

Solve 3 - x = √x2 - 5 . State any extraneous roots that you found. Identify the values of x for which the radical is defined.

*January 1, 2016*

**Math**

a)Write a function o represent the area of the rectangle. one side - 5x+15 other side - 31-2x b) Graph the function- lebel x and yint c)what dp the x-intercepts represent in this situaltion? d)Does the funtion have a maximum value in this situaltion? Does it have a minimum ...

*January 1, 2016*

**computer simulation**

A grocery store has three checkout lanes (checkout 1, 2, and 3), each with a single checker. Shoppers arrive at the checkout area with interarrival times having an exponential distribution with mean 2.4 minutes. The shoppers enter the lane that has the fewest number of other ...

*December 9, 2015*

**phomolong secondary school**

i am a grade 11 learne,i cant choose the that is good for me from the following subject history,geography,life science,sepedi,life orientation,english,math literacy.

*December 1, 2015*

**Spanish**

Elena packed 48 cubes into this box each cube has edges that are 1 centimeter how many layers of cubes did elena 5?

*November 6, 2015*

**igbo**

what is adverb called in igbo

*November 1, 2015*

**math**

the electron beam in a television tube consists of electrons accelerated from rest through a potential difference of about 20000v.what is the speed of the electrons?(ignore relativistic effects).electron rest mass is 9.11 X 10^-31kg and electron charge is 1.6 x 10^-19

*October 25, 2015*

**science**

D=150mm =0.15m t=2mm =0.002m T=400MPa =400E6Pa T=F/Al F=TAl =T*Pi*D*t =400E6*3.1416*0.15*0.002 =376911.12N =376.9KN

*October 19, 2015*

**Physis**

S=1/2*g*t*t, h=1/2*10*7*7 h=5*49=245m

*October 15, 2015*

**Math**

Wilma drove at an average speed of 35 mi/h from her home in City A to visit her sister in City B. She stayed in City B 15 hours, and on the trip back averaged 40 mi/h. She returned home 41 hours after leaving. How many miles is City A from City B?

*September 7, 2015*

**science**

A body of mass 20kg moving with a velocity of 8m/s collides with a stationary body of mass 10kg and the two stick together.They then move with a common velocity V.Find the value of V.

*August 26, 2015*

**better days**

a ball thrown vertically from the ground level hits the ground after 4secs.calculatethe maximumheight it reachedduringit's journey.(g=10m/s2)

*August 9, 2015*

**physics**

a stone projected horizontally from the top of a tower with a speed of 4m/s lands on the level ground at a horizontal distance 25m from the foot of the tower. calculate the height[g=10m/s2]. is it u squared divided by 2g

*August 3, 2015*

**Science**

9. The Pleistocene Epoch, from 1.7 million years ago to 10 000 years ago, was marked by A. a lack of oxygen B. the presence of warm, tropical seas C. the southern movement of the North American continent D. the formation of glaciers that covered parts of the Northern ...

*July 9, 2015*

**Science**

A skydiver steps out of a helicopter hovering thousands of metres above ground. After 3.5 s of free fall the skydiver pulls the rip cord. What is the skydiver’s displacement during the 3.5 s of free fall?

*July 4, 2015*

**Science**

A baseball flew 19.6 m straight up into the air after being hit by a bat. How long should it take for the ball to return from its maximum height? A. 1.02 s B. 1.91 s C. 2.00 s D. 3.99 s

*July 4, 2015*

**Science Help Not sure**

A traffic-safety engineer is designing a deceleration lane. She is basing the length of this lane on the distance needed to slow down from 126 km/h to 65 km/h in 8.0 s. How long will the deceleration lane be? A. 2.1 x 10^2 m B. 3.8 x 10^2 m C. 4.2 x 10^2 m D. 7.6 x 10^2 m

*July 4, 2015*

**Science**

Starting from rest, an object rolls down a long ramp with a constant acceleration of 1.72 m/s2. After rolling for 4.75 s, what is the magnitude of the ball’s final velocity? A. 9.81 m/s B. 8.17 m/s C. 6.30 m/s D. 4.09 m/s

*July 4, 2015*

**Science Help Not sure**

Within the Gaetz Lake Sanctuary in Red Deer, Alberta, is a looped trail that is 4 km long. Suppose a person walked all the way around the looped trail in 1 h, ending where he or she started. Which statement best describes this person’s motion over this time interval? A....

*July 4, 2015*

**science**

A vehicle is travelling 1.0x10^2 km/h. what is the spped of the vehicle in metres per second? 28m/s 27.8m/s 3.6x10^2m/s 1.0x10^4m/s

*July 4, 2015*

**Science**

whats the difference between average speed and instantaneous speed?

*July 4, 2015*

**Science**

1.The sound from a bolt of lighting travelled 4.08km in 12.0s. whats was the spped of the sound in metres per second? 0.340m/s 49.0m/s 340m/s 343m/s 2.A vehicle is travelling 1.0x10^2 km/h. what is the spped of the vehicle in metres per second? 28m/s 27.8m/s 3.6x10^2m/s 1.0x10...

*July 4, 2015*

**Science**

which of the following is not scalar quantity. 0.20m 5.0m/s 10.0m/s[E] 110km/h

*July 3, 2015*

**physics**

a car travels at uniform velocity of 20m/s for 5 seconds, the breaks are then applied and the car comes to rest with uniform retardation in further 8 seconds. draw a graph of velocity against time.How far does the car travel after the breaks are applied.?

*June 9, 2015*

**Economic**

Using Simpson role to find the denvatives of x=(y²+3x+7) (x²-4)

*May 29, 2015*

**math**

ref to the question above to rewrite 2/5, 1/6 and 1/3 in ascending order : I think we first find the common denominator which is 30 then 2/5 is the simplified fraction of 12/30, 1/6 is also the simplified fraction of 5/30 and lastly10/30 has been simplified to get 1/3. from ...

*April 4, 2015*

**Math**

Show three ways to make 0.60 without using pennies

*March 9, 2015*

**english**

define literature

*February 23, 2015*

**Statistics**

For $5 you can buy a ticket for a drawing for a prize of $2,000. The probability of winning the prize is 0.001. How much money to you expect to win

*February 20, 2015*

**Physics**

The position of a point A is specified as A (5.7).the y-coordinate is ?

*January 20, 2015*

**physics**

The standard piece of apparatus used to measure distance in the laboratory is what?

*January 20, 2015*

**physics**

The S.I. Unit of displacement is what?

*January 20, 2015*

**maths lit,geography,tourism,business studies,l.o**

yes i passed them with good grades

*January 4, 2015*

**Math Plz dont ignore Plz**

what do you mean show my work. do you mean show what i have done, if i don't know the question how can i show my work? i just need to know how to do it. so i can practice on it.

*December 15, 2014*

**Math Plz dont ignore Plz**

The Eskimos are trying to generate more money because player wages are increasing. they have came up with a couple of plans: Plan 1 : they are going to open up 1850 new seats in the endzone that will be reserved for family seating. they project that they will, on average, get ...

*December 15, 2014*

**math**

The Eskimos are trying to generate more money because player wages are increasing. they have came up with a couple of plans: Plan 1 : they are going to open up 1850 new seats in the endzone that will be reserved for family seating. they project that they will, on average, get ...

*December 15, 2014*

**astronomy**

it will be less than 365 days for sure, because without the sun earth will be spinning fast

*December 15, 2014*

**Any math tutor online? Help**

ik you cant graph here, but plz can you tell me the x and y intercept so i can do the grpgh

*December 15, 2014*

**Any math tutor online? Help**

Two companies charge these rates for printing a brochure : Company A charges $175 for set up and 0.10 pet brochure Company B charges $250 for set up and 0.07 pee brochure A linear system that model this situation is C=175 + 0.10n C =250+ 0.07 Where c is the total A) graph the ...

*December 15, 2014*

**Any Math Tutor Online? Help**

thx but do you think c) is right? what about the 6

*December 14, 2014*

**Any Math Tutor Online? Help**

man on 12m tower, he observed two houses. the angle of depression to one of them was 6' and the other is 3'. how far apart the houses are. Calculate the distance between the house if: a)the houses are on the same side of the tower b)the houses are on opposite sides of ...

*December 14, 2014*

**English Landguage**

Write on the topic bogs should not help in the kitchen.help

*December 1, 2014*

**The Aim of being in the university**

Educate you acdemics, morally & spritually

*October 17, 2014*

**algebra**

t=10/3+c/3

*September 16, 2014*

**math**

Add the odd numbers divisible by 3 lying between 200 and 400.is arithmetic or geometric progression.

*August 26, 2014*

**MATH**

IF 810 BOYS WEED A PLOT OF LAND IN 4 YEARS, HOW MANY YEARS WOULD IT TAKE 1080 BOYS TO WEED THAT SAME PLOT OF LAND?

*April 4, 2014*

**math**

Bladder infections are often caused when the bacteria E. coli reach the human bladder. Suppose that 3000 of the bacteria are present at time t = 0. Then t minutes later, the number of bacteria present will be a) How many bacteria will be present after 10 minutes? 30 minutes? ...

*March 24, 2014*

**math**

The position of an object moving in a straight line is given by the function , where s(t) represents distance traveled and t represents the time the object has been in motion. How long (to the nearest tenth) will it take the object to move 17 meters?

*March 24, 2014*

**Albegra**

step by step on how to solve this problem 2420/(570+r) = 2140/(570-r)

*March 8, 2014*

**math 5**

Elena packed 48 cubes into this box each cube has edges that are 1 centimeter how many layers of cubes did elena make?

*March 3, 2014*

**Physics**

Vector is quantity that is one which has direction as well as magnitude

*February 18, 2014*

**MATH**

HOW DO YOU SIMPLIFY SURDS WITH CUBED 98 ROOT?

*February 14, 2014*

**English**

The answer is Chicago. You basically pick the number of letters stated in the fraction. For example, 3/7 of a chicken. The word 'chicken' has 7 letters. So, you pick the first 3 as stated in the fraction. Then, you do the same for other given words too and you end up ...

*January 25, 2014*

**Statistics**

It is computed by the average distance from the average or average of all the averages for multiple sets of data. It is important because it measures the variability in the set of data. It helps in finding how close the values of data set are to the mean. We compute the z-...

*January 23, 2014*

**math**

Chad buys peanuts in 2-pound bags. He repackages them into bags that hold 5/6 pound of peanuts. How many 2-pound bags of peanuts should Chad buy so that he can fill the 5/6-pound bags without having any peanuts left over?

*January 15, 2014*

**physics**

A spiral spring of natural length of 30.0cm and a constant force of 20N/m is compressed to 20cm. Calculate the energy stored in the spring.

*January 7, 2014*

**physics**

A spiral spring of natural length of 30.0cm and a constant force of 20N/m is compressed to 20cm. Calculate the energy stored in the spring.

*January 7, 2014*