Saturday

February 25, 2017
Total # Posts: 281

**Maths**

The angles of elevation of the highest point of a building from two points S and T are 60 degree and 30 degree respectively,T is vertically above S and ST=10m.Calculate the height of the building above the level of S

*February 7, 2017*

**Chemistry**

.005

*October 29, 2016*

**Math**

From a point P on the ground which is 100m from the foot of a church tower, the angle if elevation of the top of the tower is 50 degrees calculate the height of the tower...

*September 21, 2016*

**Physics**

How do you calculate tension

*July 7, 2016*

**Math-Calc**

Suppose that f(x)=6x(3−2x)3. f(x)=6x(3−2x)3. Find an equation for the tangent line to the graph of ff at x=1x=1.

*May 26, 2016*

**Physics**

A car drove 17m/s [N] for 10 seconds, and then speeds up to 25m/s [S] for 7.4 seconds. What is the average speed of the car?

*April 24, 2016*

**Geometry**

If a pie was cut into four equal pieces, adjacent angles would add up to 180 degrees, meaning they are supplementary angles.

*April 18, 2016*

**life orientation**

physical, social and economic consequences of this crime to the offender. how did this corruption and fraud impact negetively in the country, for example, service delivery, tax, expense of trial

*April 12, 2016*

**Precalculus**

The graph of the parametric equations x=cos(t), y=sin(t) meets the graph of the parametric equations x=2+4cos(s), y=3+4sin(s), at two points. Find the slope of the line between these two points.

*April 9, 2016*

**Chemistry**

How do you prepare one liter of phosphate buffer 0.01 M at pH 12.0 from 85% phosphoric acid (density 1.69g/ml) and NaOH 1.0 M

*April 7, 2016*

**life orientation**

describe a recent corruption and fraud case in the country making headlines in the media: who the role players extent to which lead to the other crimes, role played by the media and that the states to deal with this crime. how they fraud and corruption affected offenders career

*April 7, 2016*

**life oriantation**

Critically discuss six ways in which the human rights ...

*April 5, 2016*

**life orientation**

Critically discuss six ways in which the human rights ...

*March 31, 2016*

**math**

simple interest per month on $210,000.00 loan at 1/4% is how much?

*January 17, 2016*

**SQL PROGRAMMING INFORMATION SYSTEMS**

In the following SQL query why do they have an independent letter then period then the table name? I seemed to have missed something in the reading and cannot find it for the life of me SELECT D.DNAME, E.ENAME FROM DEPT D LEFT OUTER JOIN EMP E ON D.DEPTNO = E.DEPTNO ORDER BY D...

*November 18, 2015*

**Physics**

An object falls from rest. While falling it changes its speed by 10 meters per second every second. Calculate how far it has fallen, in meters, after falling for 4 seconds. However, do not put the units in the box below.

*November 4, 2015*

**Physics**

A stone is dropped from the top of a cliff and hits the round below with a speed of 50m/s. Assume that the acceleration due to gravity is 10m/s/s. Find it's mean speed, in m/s, during the fall. Do not include units when typing your answer into the box. Using the answer you...

*November 4, 2015*

**Physics**

A car is initially travelling at 30m/s, which is above the speed limit. The driver sees a speed limit trap ahead and applies the brakes for 5 seconds, causing the car to slow down by 2m/s every second while the brakes are on. How far does the car travel while the brakes are ...

*November 4, 2015*

**Physics**

Two blocks with masses m1 = 24.3 kg and m2 = 66.9 kg, shown in the figure, are free to move. The coefficient of static friction between the blocks is 0.34 but the surface beneath m2 is frictionless. What is the minimum force F required to hold m1 against m2

*October 22, 2015*

**physics**

5.34m/s^2

*October 22, 2015*

**stats**

it will still be 50% because you have 1 favorable option out of 2. Past results wont affect the future outcome of this event.

*September 7, 2015*

**statics**

5N 30degrees and 10N 45 degrees 10N at 3rd quadrant. find the direction of resultant force.(in degrees) a.)2.74 b.)-4.57 c.)-2.74 d.)5.33 e.)4.57

*August 26, 2015*

**chemistry**

Unfortunately, there is often more than one way to answer a textbook example. In class, it's one way (the quickest way), and in the textbook, it's another. The "quick" way is fine for tests and exams... but it is useful to me that I learn alternate methods as...

*August 9, 2015*

**chemistry**

Okay, I just figured out the answer and where my confusion came from. Correct me if I am wrong. x/0.104+0.950x = 4.27/7.98 7.98x = 0.44408+4.0565x 7.98x-4.0565x = 0.44408 3.9235x = 0.44408 x = 0.44408/3.9235 x = 0.1131846566

*August 9, 2015*

**chemistry**

Standard Addition Question: Serum containing Na+ gave a signal of 4.27 mV in an atomic emission analysis. Then 5.00 mL of 2.08 M NaCl were added to 95.0 mL of serum. This spiked serum gave a signal of 7.98 mV. Find the original concentration of Na+ in the serum. I can't ...

*August 9, 2015*

**Area**

How many flowers can you plant in an area 19 square metres if each flower needs 0.04 square metres of space

*August 7, 2015*

**Algebra problem**

A cyclist travels at an average speed of 12km/h. At this rate how far will he travel in 9h What's the equation for this?

*August 1, 2015*

**English**

Can you make me a sonnet. 14 lines . 10 syllables. any topic will do.

*July 30, 2015*

**Computer**

Input Process Output or IPO with Flowchart Question: A reel of electric wire 150 metres long is cut into two pieces.One is 40 metres shorter than twice the length of the other.How long is each piece. Please answer with flowchart.Thanks and god bless.

*July 23, 2015*

**Math**

A reel of electric wire 150 metres long cut into two pieces. One is 40 metres shorter than twice the length of the other. How long is each piece.

*July 6, 2015*

**Math**

At an electronics store, the number of 37-inch HGTVs that is expected to be sold in a month is double that of 58-inch HGTVs and 50-inch HGTVs combined. Sales of 58-inch and 50-inch HGTVs are expected to be equal. 58-inch HD-TVs sell for $4800 50-inch HD-TVs sell for $2000 37-...

*June 22, 2015*

**Algebra**

The Jones family bought a new pet rabbit. They want to build an enclosure outside . They have 30ft of lumber. Find the length and width of the enclosure if the length is to be 4ft longer than twice the width.

*June 22, 2015*

**Algebra**

The number of 37-inch HDTV's that is expected to be sold in a month is double that of 58-inch HDTV's and 50-inch HDTV's combined.sales of 58-inch HDTV's are expected to be equal. 58-inch HD-TV's sell for $4,800, 50-inch HD-TVs sell for $2000, and 37-inch ...

*June 22, 2015*

**Algebra**

Oil that costs $22.50/barrel is mixed with oil that costs$35.00/barrel. How many barrels of each oil should be included in 1250 barrels of mixture that sells for $27.50/barrel?

*June 22, 2015*

**Algebra**

A student has 70%, 80%,79%,and 69% on the first 5 tests . There is one test left and he wants to get at least an 80% in the course. is it possible ? Explain.

*June 22, 2015*

**algebra**

Deb is slicing up a cake for three people. The cake is 45cm long and the second piece is 10cm longer than the first, and the third piece is 5 cm less than double the first . How big is each slice?

*June 22, 2015*

**sciences**

Electro magnetic radiations

*May 19, 2015*

**Chemistry**

How much milk at 10.00°C needs to be added to a small 150.0 ml cup of coffee at 95.00 °C to drop the temperature to 90.00°C? Assume coffee and milk have the same specific heat capacity as water: 4.186 J/g °C or 1 cal/ g °C, and they also have the same ...

*March 1, 2015*

**statistics**

For the first one, 13% are Civil Engineers, but where do I go from there?

*January 16, 2015*

**statistics**

In a class of 100 students, 30 are computer science majors, 49 are mechaincal engineering majors, 13 are civil engineers and the rest are general engineering majors. Assume students only have one major. If a student is chosen at random what is the probability they are: a civil...

*January 16, 2015*

**Art**

C B D IS CORRECT

*January 15, 2015*

**MATH EMERGENCY**

The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 + 0.7x + 1 where p is the ...

*December 3, 2014*

**math**

Sue has a total of $4000 to invest in two accounts. one account earns 2% simple interest and the other earns 5% simple interest. How much should be invested in both accounts to earn exactly $155 at the end of the year?

*October 3, 2014*

**algebra**

A plane takes 3 hours to travel 1500 miles with the wind. it can travel only 1380 miles against the wind in the same amount of time. Find the speed of the wind and the speed of the plane in still air.

*October 3, 2014*

**math**

A 70% acid solution is to be mixed with a 40% solution. How many gallons of each solutions are needed?

*October 2, 2014*

**Physics**

Two small pith balls, each of mass m = 17.4 g, are suspended from the ceiling of the physics lab by 1.2 m long fine strings and are not moving. If the angle which each string makes with the vertical is = 17.9°, and the charges on the two balls are equal, what is the ...

*September 5, 2014*

**statistics**

you were wrong, its B

*April 27, 2014*

**Science URGENT help please**

Piano movers hoist a 200 kg piano 10 m high in 30 s using a rope and simple pulley. What is their power output? (Points : 1) 70 W 700 W 7,000 W 6 × 10^5 W

*April 16, 2014*

**physics**

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

*April 3, 2014*

**pyhsics**

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

*April 3, 2014*

**physics**

Calculate the average force per nail when Sarah (following figure), who weighs 130 pounds, lies on a bed of nails and is supported by 600 nails. (Figure 1) Express your answer using two significant figures.

*April 3, 2014*

**physics**

A dike in Holland springs a leak through a hole of area 0.60cm 2 cm^2 at a depth of 1.4m m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the appropriate units.

*April 3, 2014*

**physics**

Find its density. Express your answer to two significant figures and include the appropriate units How does this compare with the density of water? Express your answer using two significant figures.

*April 3, 2014*

**physics**

In the sketch, the small hydraulic piston has a diameter of 2.5cm cm . The large piston has a diameter of 6.4cm cm . For each newton of force applied to the small piston, how many newtons of force are exerted by the large piston? Express your answer using two significant ...

*April 3, 2014*

**physics**

205.8 J/s

*April 3, 2014*

**Statistics**

Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class.

*March 16, 2014*

**accounting**

Heww Inc., issued a $50,000, 10 year bond with a stated interest rate of 6%. Assume interest payments are made semi-annually. What is the selling price of the bond if the market rate of interest is 5%? (Round to the nearest dollar.)

*February 13, 2014*

**Math easy please help**

I just need help with rounding for making sure I round my answer correctly. Can you round this 1.299678785 to the nearest hundredth Thanks :)

*February 10, 2014*

**Physics 112**

Moving a charge from point A, where the potential is 370V , to point B, where the potential is 190V , takes 4.1×10−4J of work. Part A What is the value of the charge?

*January 30, 2014*

**algebra**

using formula d(h)=8e^-0.4h to determine the milligrams d of a certain drug in bloodstream h hours after given.how many milligrams will be present after 6 hours?

*July 17, 2013*

**ALGEBRA**

7300 @ 7% COMPOUNDED SEMIANNUALLY FOR 3 YRS

*May 18, 2013*

**physics**

solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle è = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is ì = 0.64. What is ...

*March 31, 2013*

**Algebra**

A rectangle is 5 times longer then it is wide. If perimeter of the rectangle is 222m. What are its dimensions

*March 27, 2013*

**math**

Phil invested $150 at an annual rate of 4% compounded continuously, what amout to the nearest cent will be in his account after 2 years? Graph the amount in his account over the first 8 years.

*February 20, 2013*

**math**

A cable company charges $40 plus $12 for each cable jack. If x is the number of jacks installed, the linear equation is C=12x+40. graph the total

*February 20, 2013*

**US HISTORY**

It was a stock market crash

*February 19, 2013*

**Physics**

A small object of mass 2.60 g and charge -17 µC "floats" in a uniform electric field. What is the magnitude and direction of the electric field?

*February 17, 2013*

**Physics**

Calculate the net charge on a substance consisting of a combination of 7.5 multiplied by 1013 protons and 3.5 multiplied by 1013 electrons. Answer in units of C

*February 17, 2013*

**Math**

I need help solving this equation using the Factoring Completely method. X⁴-x³

*February 1, 2013*

**Physics**

A guitar string is 90cm long and has a mass of 3.8g . The distance from the bridge to the support post is L=62cm , and the string is under a tension of 540N . What are the frequencies of the fundamental and first two overtones?

*January 25, 2013*

**Physics**

Two spheres of charge q1 and q2 that are equal in magnitude (i.e. |q1| = |q2|) are attached by a spring with a constant k = 1440kg/s2 and a rest length of x0 = 83.0cm. We take negative values of Äx for compression and positive Äx values for expansion. Knowing that q1...

*January 17, 2013*

**Geometry**

find the area of a triangle whose base(b) is 8 inches and whose height (h) is 12 inches

*January 2, 2013*

**Geometry**

If the length(L) of a rectangle is 15 inches and the Width(W) is =2 in. Then what is the area?

*January 2, 2013*

**Geometry**

If the base(b) of a triangle is 9 inches and the height(h)is =12 in. Then what is the area?

*January 2, 2013*

**Algebra**

Which is the correct answer to the following: Simplfy: 2 + 3 . 10 Devided by 5 . 3 - 9 A)"5 B) 21 C)"60 D) 11

*January 2, 2013*

**American Government**

True or False: The U.S. "Superior" Court is the Nation's most powerful court? (is Superior and Supreme one in the same?)

*January 1, 2013*

**geometry**

What is the area of a triangle if the base is 12 inches and the height is 18 inches?

*January 1, 2013*

**Algebra**

Simplify: 2 + 3 . 10 Devided by 5 . 3 - 9 (Thanks and Happy New Year!)

*January 1, 2013*

**Algebra**

What is the evaluation of: a - 13 when a = 33. Thanks & Happy New Year :)

*January 1, 2013*

**Algebra**

What is the value of 3a when a = `4. (Thank you in advance & Happy New Year!)

*January 1, 2013*

**Algebra**

What is the value of 20x when x = 10. (Thank you in advance and Happy New Year! :)

*January 1, 2013*

**Algebra**

True or False: If an agebraic expression calls for Y=8, that means that you will use the number 8 to replace the letter Y in order to solve the expression?

*January 1, 2013*

**English**

Mr. Smith, my Spanish teacher, is going on vacation. is this correct PUNCTUATION AND GRAMMER

*December 31, 2012*

**Physics**

Force equals mass times acceleration...the mass of your vehicle is the same, always. The acceleration is also to be considered the same for both problems. So if both equations, (one for collision with wall, and one for other car) have the same numbers, then the forces are ...

*December 6, 2012*

**Physics**

hah I love how everyone in physics with Kaminsky is looking here

*October 25, 2012*

**Algebra**

What is the inverse of y = (3/7)x + 9 I know you have to switch x and y so I get to x-9=(3/7)y from there I don't know what to do.

*October 9, 2012*

**Physics- PLEASE HELP**

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. Repeat the problem for the case where the coefficient of kinetic friction between each...

*October 3, 2012*

**Physics- PLEASE HELP**

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. Repeat the problem for the case where the coefficient of kinetic friction between each...

*October 3, 2012*

**physics**

A bicycle wheel of radius 0.4 m is spinning at a rate of 40 revolutions per minute. What is the centripetal acceleration of a point on the edge of the wheel? What is the period of the wheel's motion?

*September 28, 2012*

**Math**

The way this is written you need to A:conduct three trials using three different coins (1 for each trial). For each trial flip the coin three times & record the results (heads even & tails odd). Each flip represents one of the three misses for that route. B: Actually do the ...

*August 7, 2012*

**statistics**

thanks!

*July 18, 2012*

**statistics**

So if a scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard deviation in the population was ...

*July 18, 2012*

**statistics**

So if a depression scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard deviation in the ...

*July 18, 2012*

**Physics**

HELP WITH c.!!! A electric bill showed 1200 kilowatt hours (kWh) purchased at a cost of $150.00. a. What does PECO charge per kWh? $0.125 b. An electric dryer is rated at 5400 W. It takes 40 minutes to dry a normal load. What is the cost per load? $0.45 c. Two 100 watt ...

*May 30, 2012*

**physics**

Microwaves are electromagnetic waves transmitted at a normal frequency of 2.45 GHz. Find the wavelength of the microwaves.

*May 30, 2012*

**SCIENCE**

WHAT IS THE FUNCTION OF GUARD CELLS?

*May 20, 2012*

**PHYSICS**

A BODY CHANGES IT'S VELOCITY FROM 20M/S UNTIL IT COMES TO REST IN 10 SECONDS.WHAT IS IT'S ACCELERATION

*May 17, 2012*

**PHYSICS**

A LORRY INCREASES VELOCITY FROM 6m/s TO 10m/s IN 25 SECOND.FIND THE ACCELERATION.

*May 17, 2012*

**Physics 121**

Two block are connected by a rope that runs over a pulley. The block on the tables has mass 4kg, the hanging block has mass 2kg, and the pulley has mass 0.5kg and radius 0.25m. Assume that the table is friction-less. If the block are released from the rest, determine their ...

*May 5, 2012*

**Math**

1. P = positive results / total attempts. In this case, 11/50 = .22 = 22% 2. Increase the sample size. The more data he accrues, the closer the experimental probability will be to the theoretical probability.

*May 4, 2012*