Sunday

February 26, 2017
Total # Posts: 273

**Chemistry**

A is a solution of hydrochloric acid containing 3.650g of HCl in 1dm3 of solution. B is a solution of impure sodium carbonate. 25cm3 of B require 22.7cm3 of A for complete reaction. Given that 5.00g of impure B was dissolved in1dm3 solution,what is the percentage by mass pf ...

*February 23, 2017*

**Math**

The shipping clerk packs a cube with side lengths of 8 inches into a box with side lengths of 10 inches. What is the volume of the space left in the larger box for packing materials?

*February 15, 2017*

**math**

A baseball diamond is a square with each side 90 feet long. What is the straight-line distance from third base to first base? (Round your answer to the nearest tenth.)

*February 1, 2017*

**math**

The north wall of a barn is a rectangle 25 feet high and 60 feet long. There are five windows in the wall, each 8 by 10 feet. If a gallon of paint will cover 275 ft2, how many gallons of paint must the painter buy to paint the wall?

*February 1, 2017*

**Physics **

a boat sails 150km N60°E, then 100km West. What is it's displacement from its starting point?

*January 25, 2017*

**kelvin**

P,Q and R are points on the same horizontal plane .the bearing of Q from P is 150° and the bearing of R from Q is 060°. if |PQ| =5m and |QR|=3m find the bearing of R from P correct your answer to the nearest degree

*January 9, 2017*

**civic education**

limitation of human right

*January 8, 2017*

**MATH**

IF LOG10 A=4,WHAT IS A?

*January 2, 2017*

**Chemistry**

A minimum energy of 151 kJ is required to dissociate a mole of iodine molecules, I2. Calculate the wavelength of radiation that supplies this energy, assuming each bond beaks by absorbing one photon.

*November 28, 2016*

**Science**

Which is the molarity of a solution containing 20 g of CH3 OH in 300 mL of solution

*November 10, 2016*

**Math**

Every Wednesday is salad bar day at Ashley's school. The most popular ingredients are cherry tomatoes, cucumber slices, and shredded carrot. Last Wednesday, out of the 27 students in Ashley's class- 14 took carrot 13 took cucumber 16 took tomato 8 took cucumber and ...

*October 26, 2016*

**physics**

A car travels 20 km southwards and then another 30 westwards. What is the displacement of the car from its initial position?

*October 21, 2016*

**math**

12,b,75 are consecutive terms of a geometrical sequence what is the common ratio?

*October 20, 2016*

**Physics**

An unknown substance at a temperature of 20 degrees Celsius is warmed up to 50 degrees when water at 80 degrees is added to it. Can I post this question. There is more information I have and the point is to find the specific heat of the unknown substance.

*October 11, 2016*

**linear algebra**

A signal lac has six flags of which 1is blue ,two z white,3 ar red.it sends messages hostin flags in a flagpole.d messages ar being conveyed by d order in which d colours ar arranged find hw many mesaages it can send.......a.using exactly six flags,b.using exactly five flags

*August 31, 2016*

**PHYSICS**

What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?

*April 24, 2016*

**Chemistry**

Calculate the concentrations of Cd2 +, [Cd (CN) 42] and CN at equilibrium when they dissolve 0, 42mol of Cd(NO3)2, molarity= 2.50 M Kf =7.1x10^16

*April 23, 2016*

**Physics**

A 900-kg merry-go-round (a flat, solid cylinder) supports 10 children, each with a mass of 50.0 kg, located at the axis of rotation (thus you may assume the children have no angular momentum at that location). You need to describe a plan to move the children such that the ...

*April 22, 2016*

**Maths**

A box is made of wood 5cm thick, its internal dimension are 10cm by 8cm by 11cm, what is the volume of the wood in the box

*April 20, 2016*

**life orientation**

Describe the three human rights violations or discriminations you selected and give at least two examples of such violations you found in your research

*April 20, 2016*

**life orientation**

Guys am in deep trouble pls hlp

*March 31, 2016*

**Math**

a man drives 30 miles in 2 hours. how many miles he will drive in 8 hours?

*March 8, 2016*

**Physics**

A truck is moving away at 30 mph from a car moving towards the truck at 60 mph. If the truck emits a horn of frequency 500 Hz, what frequency does the driver of the car hear to 3 significant digits? how do i solve i know the answer is 519hz but how?

*February 23, 2016*

**Math**

Sandra is traveling 17 mph on her bicycle. After 4 hours, how far will she have traveled

*February 10, 2016*

**Science**

-10kJ because you have to consider the work due the H2 (-6,7kJ) and the work due the O2 produced (-3.3kJ) in the reaction.

*February 3, 2016*

**Maths**

A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone? (A)find the base radius of the cone. (B)calculate the area of the base of the cone.

*February 2, 2016*

**Physis**

245m

*October 15, 2015*

**chem**

a) Co(H2O)6^2 + 4 Cl^‐1 (aq) ⇄ CoCl4^‐2 (aq) + 6 H2O (l) Rewrite the net ionic equation above including the energy term where appropriate. The Delta H for this reaction is +50 kJ/mol. b) Silver chloride (AgCl) is a white solid. For the equilibrium reaction ...

*October 4, 2015*

**Math**

how do you solve? kim's mom is 47 years old. in 5 years her mother will be 10 years older than twice what kim's age will be. how old is kim now?

*September 10, 2015*

**Physics**

A voltmeter is specified as being accurate to within 2%. The reading on the voltmeter is 3.50v..the maximum voltage represented by this reading is?

*August 27, 2015*

**algebra1**

okay than bye

*August 22, 2015*

**algebra1**

hey look i need help !

*August 22, 2015*

**algebra1**

hello?

*August 22, 2015*

**algebra1**

can you help me ?!

*August 22, 2015*

**algebra1**

What if they are diffrent people !

*August 22, 2015*

**algebra1**

umm idk who u are taking about

*August 22, 2015*

**algebra1**

im sorry what are u taking about

*August 22, 2015*

**algebra1**

Melissa wants to figure out how many fish live in a small lake by her house .She ccatces 15 fish and tags the (safely).Shethen outs thoes fish back in the lake .Then next day ,she catches 28 fish .of those 28 fish, 3 of them have the tags on them.About how many total fish live...

*August 22, 2015*

**Algebra**

i mean zoe is my sis

*August 22, 2015*

**Algebra**

my beother is victor

*August 22, 2015*

**Algebra**

Thanks !

*August 22, 2015*

**physics**

The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At 21.3 °C the air gap between the rods is 1.70 x 10-3 m. At what temperature will the gap be closed?

*August 16, 2015*

**physics**

A person who weighs 717 N is riding a 80-N mountain bike. Suppose the entire weight of the rider plus bike is supported equally by the two tires. If the gauge pressure in each tire is 8.10 x 105 Pa, what is the area of contact between each tire and the ground?

*August 16, 2015*

**physics**

The Eiffel Tower is a steel structure whose height increases by 19.0 cm when the temperature changes from -9 to +41 oC. What is the approximate height (in meters) at the lower temperature?

*August 16, 2015*

**basic programming principles**

2.Write only the select case statements for the following problem statement. The marital code of a person is stored in the variable called marCode. Display the corresponding description on the screen. Provide for an incorrect marital code Marital Code S Single D Divorced M ...

*March 31, 2015*

**Overdue Science Lesson, Very Urgent.**

This is why we have google.

*February 20, 2015*

**Written Communication**

At the library, the quickest way to locate varied, reliable information for your research paper is to A. check the encyclopedias. B. search the card catalog for related titles. C. ask the reference librarian. D. check the Readers' Guide.

*January 21, 2015*

**grovment**

The Electoral College was included in the Constitution primarily because the Framers believed that __________. political parties might be regulated by the government the general public might be swayed by a charismatic leader cooperation between the executive and legislative ...

*November 25, 2014*

**math problem (please help)**

hey r u single

*November 24, 2014*

**statistics**

40

*November 16, 2014*

**business maths**

Jennifer owes $13,000 to a friend who is charging her interest of 0.90% p.m. She is required to settle the amount owed with two equal payments, one today and the other in three months. Calculate the size of the payments using three months as the focal date. I am totally lost...

*October 30, 2014*

**physics**

A mass is thrown upward towards a vertical wall. If the release point is at a horizontal distance of 12 meters from the base of the wall, and the ball is launched at an angle of 60 degrees above the horizontal, with what speed need it be thrown so that it strikes the wall 10 ...

*September 21, 2014*

**math**

To find three numbers in geometric progression, knowing that their sum is 78 and the highest 30 units exceeds the sum of the first and second term.

*June 10, 2014*

**math**

Given the numbers 10 and 40 their averages are obtained by different procedures 16, 20 and 25 respectively. Say which is the arithmetic mean and what is the geometric mean

*June 10, 2014*

**math**

A cooling cost 1540 dollars. After four years he sold at half their value. If this is repeated every four years, the payment in the refrigerator the fifth person to buy it and after a few years this purchase was made.

*June 10, 2014*

**math**

Finding three geometrically numbers knowing that their sum is greater than 78 and 30 units exceeds the sum of the other two.

*June 10, 2014*

**Physics**

Calculate the escape velocity of a satellite launched from the earth surface if the radius of the earth is 6.4x10^6m

*May 15, 2014*

**physics**

It the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury, what is the total pressure of the gas supply in cm of water if the height of water is increase by 3cm?

*May 13, 2014*

**Finance**

What is the coupon rate of a two-year, $10,000 bond with semiannual coupons and a price of $9,543.45, if it has yield to maturity of 6.8%?

*March 29, 2014*

**Fiance**

What must be the price of a $10,000 bond with a 6.5% coupon rate, semi-annual coupons, and two years to maturity if it has a yield to maturity of 8% APR?

*March 29, 2014*

**Finance**

If $12,000 is invested in a certain business at the start of the year, the investor will receive $3,600 at the end of the next four years. What is the present value of this business opportunity if the interest rate is 7% per year?

*March 29, 2014*

**math**

The first term of an AP is 8. The ratio of d 11th term to the 7th term is 5:8 calculate the common difference

*March 19, 2014*

**Differential Equations**

A college professor contributes $5,000 per year into her retirement fund by making many small deposits throughout the year. The fund grows at a rate of 7% per year compounded continuously. After 30 years, she retires and begins withdrawing from her fund at a rate of $3,000 per...

*March 4, 2014*

**LIFE ORIENTATION**

Because they want student know about their career

*March 3, 2014*

**Science**

Acetylene gas c2h2 reaction cac2+2h2o. C2h2+Ca(oh)2 how many moles of cac2 needed to prepare 10.0 g c2h2 please show work and answer soon final question on big test review

*February 17, 2014*

**statistics**

Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course. 61,74,47,60,62,63,65,79,55,85. In all 135 students took the exam. The third quartile for all 135 scores was 69. How many students had scores higher than 69?

*December 9, 2013*

**Geometry**

What is the equation go the line that is parallel to the graph of y=1/2x+6, and who's y-intercept is -2

*November 21, 2013*

**geometry**

79 ft

*November 17, 2013*

**maths**

13feet ladder is placed 5feet away from the wall . the distance from the ground straight up to the top of the mall is 13 feet. will the ladder touch the top of the mall?

*October 25, 2013*

**Quantum Physics**

thnx frnds, all of you :-)

*October 12, 2013*

**Quantum physics**

answer of q 2 is 3/(5*sqrt(2)) |00> (3*i)/(5*sqrt(2)) |01> 4/(5*sqrt(2)) |10> (4*i)/(5*sqrt(2)) |11>

*September 8, 2013*

**Quantum physics**

answer of q 3. is 3rd option

*September 8, 2013*

**FINANCE**

Exercise anwers

*June 9, 2013*

**Grade 12 LIFE ORIENTATION**

Cancer

*May 21, 2013*

**PHYSICE**

A uniform beam of length L whose mass is m, rest with its ends on two digital scales ( Figure 13.2). A block whose mass is M rests on the beam, its center is one-fourth away from the beam's left end. What do the scales read ?

*May 21, 2013*

**math**

PQ is a vertical tower 95m high, the points R and S are on the same horizontal plane as Q, the angle of elevation of P from R is 35 if QS =155m and Q from RQS=48 1.Calculate the distance of QR 2.Calculate the distance of RS 3.Calculate the are of QRS

*May 19, 2013*

**Social**

The Goal Every cult has a stated, vague and metaphorical goal. Because this goal must serve as the "illuminated eye" of the pyramid, it cannot be attainable. Rather, it is expressed as an abstract idea - like "salvation" - which the cult members will enjoy ...

*May 9, 2013*

**Math**

113.09733552923255658465516179806

*May 9, 2013*

**world civilization**

Chinese civilizations survived, intact, until the twentieth century

*May 9, 2013*

**Algebra**

you have the formula. Plug in 1000 for N and evaluate.

*May 9, 2013*

**Math**

9X12X14=1512

*May 9, 2013*

**Math**

X=3.2

*May 9, 2013*

**Grade 12 LIFE ORIENTATION**

Cancer

*April 23, 2013*

**Quantum Physics**

thnx, all of you for your help

*April 16, 2013*

**Math**

Follow the rules carefully...... c=15.6(22/7)=3.1428571 c=15.6*3.1428571=49.028571 Approximately becomes=49.03

*April 15, 2013*

**Math**

How do you get the big number on a runaway math puzzle worksheet

*April 5, 2013*

**south al**

For a hypothetical normal distribution of test scores, approximately 95% fall between 38 and 62, 2.5% are below 38, and 2.5% are above 62. Given this information, (a) the mode=_____ and (b) the standard deviation=_____.

*March 30, 2013*

**zoology**

4. In applying cladistic analysis to construct a phylogeny of the animal kingdom, why would the presence of flagella be a poor choice of a characteristic for the grouping the phyla into clades?

*March 25, 2013*

**LIFE ORIENTATION**

10 WAYS IN WHICH THE ENVIRONMENT HEALTH HAZARD CAN IMPACT NEGATIVELY ON ONE'S HEALTH

*March 19, 2013*

**reading**

Which of the following is an example of active reading? A. Skimming over information and taking notes. B. Reviewing a chapter, question as you read, and review notes. C. Speed reading and taking notes in your own words. D. Both B & C.

*February 28, 2013*

**chemistry**

0.200

*February 4, 2013*

**physics**

I get 0.041meters. this answer does not seem plausible?

*January 24, 2013*

**physics**

A block with mass = 5.0 rests on a frictionless table and is attached by a horizontal spring ( = 130 ) to a wall. A second block, of mass = 1.35 , rests on top of . The coefficient of static friction between the two blocks is 0.40. What is the maximum possible amplitude of ...

*January 24, 2013*

**Physics**

Archimedes purportedly used his principle to verify that the king's crown was pure gold, by weighing the crown while it was submerged in water. Suppose the crown's actual weight was 14.0 N. The densities of gold, silver, and water are 19.3 g/cm^3, 10.5 g/cm^3, and 1.00...

*December 3, 2012*

**physics**

A child bounces a 54 g superball on the side- walk. The velocity change of the superball is from 23 m/s downward to 19 m/s upward. If the contact time with the sidewalk is 1 800 s, what is the magnitude of the average force exerted on the superball by the sidewalk?

*November 15, 2012*

**biology**

i need help with my genisis essay and it cant involve religion

*November 13, 2012*

**statistics**

mean of the profit = 29000.its standard deviation = 9000

*November 1, 2012*

**science**

a puppy runs a distance of 20m to its mother ina time 5s.what is the puppy's speed?

*October 5, 2012*