Monday

January 23, 2017
Total # Posts: 74

**math**

Taking the speed of the radio signal as 3×108 m/s, calculate the time taken for a signal to reach a GPS receiver from a GPS satellite at a position 21 000 km distant from the receiver. Assume that the speed of the signal is unchanged over the whole path length. Express ...

*December 6, 2016*

**??????**

A 8.4-kg block is lifted vertically 9.0 m at constant speed by a boy. The work done by the boy is about:

*November 23, 2016*

**Science**

A 8.8-kg object is moving at 5.3 m/s. A 7.4-N force is applied in the direction of motion and then removed after the object has traveled 4.7 m. The work done by this force is:

*November 23, 2016*

**chemistry**

1.2E-4 mols/kg

*November 5, 2016*

**Chemistry**

Acid in vinegar has pka value of 1.85 x 10^-5 at 25oC find the pkb value of its conjugate base?

*April 7, 2016*

**physics**

A disk with a rotational inertia of 1.4 kg×m2 and a radius of 0.8 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.2 N is applied tangentially to the rim. The angular acceleration of the disk is:

*December 31, 2015*

**Business Math**

Myerson borrowed $8,500 at 9% ordinary interest for 200 days. After 120 days, he made a partial payment of $4,000. What is the final amount due on the loan?

*November 19, 2015*

**chemistry**

draw a diagram showing the arrangement of the valency electrons in a molecule of the covalent compound arsine,ash3 use o to represent an electron from aresenic

*November 14, 2015*

**Math**

2 water pipe inlets pumping water into a tank. Pipe "A" fills up the tank in 30 minutes. Pipe "B" fills up the tank in 90 minutes. Assuming both pipes are on. How long it will take to fill up the tank.

*September 18, 2015*

**Math**

The volume of a block of a gold is 0.5 m sqare. if it is hammered into a sheet to cover an area of 1 hectare,find the thicness of the sheet.

*August 31, 2015*

**Math**

The parallel sider of a trapezium are 25 cm and 11 cm, while its nonparallel sides are 15 cm and 13 cm. find the area of the trapezium.

*August 31, 2015*

**science**

A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 5.4 m/s. It continues to fly along the same horizontal arc but increases its speed at the rate of 2.8 m/s2. Find the acceleration magnitude under these conditions.

*August 6, 2015*

**science**

20c

*June 16, 2015*

**physics**

A ball is projected upward at time t = 0.0 s, from a point on a roof 40 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 15.4m/s. Consider all quantities as positive in the upward direction. The time when the ball ...

*May 13, 2015*

**chemistry**

value and formula Ksp Of : -PbI2 -CdS -Ca(OH)2 -Ag2CrO4 -Cu2S

*March 26, 2015*

**science**

home / homework help / questions and answers / science / physics / the temperature of an ideal gas at an initial pressure ... Question The temperature of an ideal gas at an initial pressure P1 and volume V1 is increased at constant volume until the pressure is doubled. The ...

*January 8, 2015*

**maths**

home / homework help / questions and answers / science / physics / the temperature of an ideal gas at an initial pressure ... Question The temperature of an ideal gas at an initial pressure P1 and volume V1 is increased at constant volume until the pressure is doubled. The ...

*January 8, 2015*

**Mustapha**

The oxidation number of kromium in k2Cr2O7

*November 8, 2014*

**simplex Method**

Jdj

*November 6, 2014*

**physics**

test

*November 5, 2014*

**physics**

A 22-N force, parallel to the incline, is required to push a certain crate at a velocity of 6.1 up a frictionless incline that is 55° above the horizontal. The mass of the crate is:

*November 5, 2014*

**Physics**

Two springs, each with spring constant 20 N/m, are connected in parallel, and the combination is hung vertically from one end. A 10-N weight is then suspended from the other end of the combined spring. How far does the combined spring stretch as it comes to equilibrium?

*October 27, 2014*

**physics**

A soccer ball rolling across a field with an acceleration of -0.5m/s/s rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed?

*September 24, 2014*

**Physics**

2546

*September 11, 2014*

**java**

write a program thatprint on secreen the reselt of the following series: d=1+2/x^2+3/x^3+.....r/x^r . thanks

*August 10, 2014*

**CHEMISTRY**

18.75L

*June 9, 2014*

**c++**

Write a C++ program that reads the population of town A and its growth rate as well as the population of town B and its growth rate. It outputs after how many years the population of town A will be greater than that of town B and the values of their population at that time.

*June 4, 2014*

**c++**

Write a C++ program that reads the Capacity (in gallons)of an automobile fuel tank, and Miles per gallon this automobile can be driven. It outputs the number of miles this automobile is driven without refueling

*May 17, 2014*

**UOS**

Write a C++ program that reads the Capacity (in gallons)of an automobile fuel tank, and Miles per gallon this automobile can be driven. It outputs the number of miles this automobile is driven without refueling .

*May 17, 2014*

**business&technical english**

ans is bias-free language.

*May 4, 2014*

**business&technical english**

I or we is the answer.

*May 4, 2014*

**chemistry**

a compound contains only carbon hydrogen and oxygen analysis of a sample showed that it contained by mass 53.4% carbon and 11.1% hydrogen . what is the simplest formula for this compound .. step by step plese

*February 19, 2014*

**Science (Physics)**

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s 2 . Answer in units of N What is the weight on the moon? Answer in units of N What is the mass on the ...

*November 18, 2013*

**Finance**

Consider the following information and calculate the required rate of return for the Winkler Investment Fund. The total investment fund is $2 million. Stock Investment Beta ----- ---------- ---- A $ 200,000 1.50 B 300,000 -0.50 C 500,000 1.25 D 1,000,000 0.75 The market ...

*July 19, 2013*

**calculus (point me in the right direction please?)**

f'= 3x2 + 8x f'(5)= 3(25) + 8 (5)= =75+40=115 so u replace x by 5 in fx and u substract

*July 19, 2013*

**finance**

r= 3.5+1.08(10-3.5)

*July 7, 2013*

**physics**

0.5J

*May 10, 2013*

**chemistry**

calculate the pH of a 0.50 m solution of HCN. Ka for HCN is 4.9*10^-10 (The chemical equation for this.)

*April 9, 2013*

**physics**

A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ball-Earth system remains constant. (a) What is the tension in the string at the bottom? (Use the following ...

*March 18, 2013*

**Chemistry**

Thanks you Dr.Bob222. So the overall idea is that dissociation decreases molar mass and association does the opposite when a solute dissolves in a solvent. (How do you identify if either reaction occurs? Just wondering.)

*February 2, 2013*

**Chemistry**

So in this case, that a small amount of your unknown failed to dissolve in the t-butanol, it would effect the molar mass, just depending on the mass of both substances?

*February 2, 2013*

**chemistry**

Lab on Determining hard water Not sure if I answered this currently, not completely sure how to explain either. If a student has a non-zero blank correction, but forgets to include that correction in his/her calculations:? a. Would his/her calculated [EDTA] be correct, too ...

*January 18, 2013*

**chemistry**

Thanks

*January 17, 2013*

**chemistry**

Lab on Determining hard water Not sure if I answered this currently, not completely sure how to explain either. If a student has a non-zero blank correction, but forgets to include that correction in his/her calculations:? a. Would his/her calculated [EDTA] be correct, too ...

*January 17, 2013*

**MSD**

Pat and Kris are roommates. They spend most of their time studying (of course), but they leave some time for their favorite activities: making pizza and brewing root beer. Pat takes 4 hours to brew a gallon of root beer and 2 hours to make a pizza. Kris takes 6 hours to brew a...

*November 3, 2012*

**physics**

1414.2

*September 5, 2012*

**MATH**

x/9 < or = -3 x times 1/9 < or = -3 x< or = -3/1/9 x< or = -27 sorry i don't have the symbols on my keyboad, but i hope this helped

*April 25, 2012*

**Algebra 1**

m= y2-21/x2-x1 m= -6-(-4)/4-6 m=-2/-2 therefore m= 1 the answer is b) good luck :)

*April 25, 2012*

**Chemistry**

Calculate the amount of heat required to take 3.00kg of ice at -10 degrees Celsius to 115 degrees celsius.

*April 25, 2012*

**5th grade math**

Mr. Hightower recorded the amount of each project that had been completed at the end of the week. The line plot describes the information he recorded. What fraction of the projects were complete?

*April 19, 2012*

**physics**

When driven by a 120 Hz vibrator, a string has transverse waves of 31 cm wavelength traveling along it. (a) What is the speed of the waves on the string& (b) Is the tension in the string is 1.2 N, what is the mass of 50 cm of the string?

*April 17, 2012*

**physics**

Two blocks with masses m1 = 7 kg and m2 = 4 kg are connected with a rope and move on two surfaces of a right-angled wedge as shown in Fig. 6.6 Given that θ1 = 37 °, θ= 53°, μ= 0.2, and μ= 0.1, find the acceleration of the blocks

*April 1, 2012*

**Mechanics M1**

A rabbit runs in a horizontal straight line ABC across a field (a)the rabbit runs from rest at A with a constant acceleration of 0.8 m/s^2 and reaches B after 3 seconds, find its speed at B

*March 7, 2012*

**Physics**

60 kg * 5 m/s + 40 kg * 0 m/s = (60 kg + 40 kg) * v_final 300 kg*m/s = 100 kg * v_final 3 m/s = v_final

*February 21, 2012*

**math**

The sum of the firest 9 terms of an A.P is 72 and the sum of the next 9 terms is 71, find the A.P

*October 28, 2011*

**math**

The sum of the firest 9 terms of an A.P is 72 and the sum of the next 9 terms is 71, find the A.P

*October 28, 2011*

**geometry**

if a measure of an angle is -2x^2+19x and the measure of it's supplement is 4x^2-6 what's the measure of angle and supplement

*October 17, 2011*

**statistics**

1. Use the following information about a group of college students: Fifty percent are taking Algebra. Sixty percent are taking Biology. Thirty percent are taking both Biology and Algebra. A student from the group is selected at random, calculate the following: a) The ...

*September 18, 2011*

**physics**

tell me

*March 17, 2011*

**chm**

Silver chloride, often used in silver plating, contains 75.27% .Calculate the mass of silver chloride required to plate 195 of pure silver.

*February 10, 2011*

**English**

what is the meaning of the heaven were let loose

*December 4, 2010*

**physics**

I want the answer. Where is it ?

*November 7, 2010*

**Physic**

I am having trouble with some of this question. 'A student standing at the top of a cliff shoots an arrow from a height of 30.0 m at 25.0 m/s and an initial angle of 32.0 degrees above the horizontal. b. How high above the landscape under the cliff with arrow rise? assume ...

*January 11, 2010*

**Art**

Okay! Thank you so much

*November 7, 2009*

**Art**

I can see the motion which is the line for visual element and i can see the balance in design element... Am i right?

*November 7, 2009*

**Art**

Okay but what are the elements in it? i mean in that painting for visual element is it the color ? and for design element is it balance?

*November 7, 2009*

**Art**

Yes , what i mean is for 1.Visual element (line,shape and mass, color, light, texture and pattern, space,time and motion) 2.Design element ( unity and variety, balance, emphasis and subordination, scale and proportion, rhythm) So what i need is to find one painting that ...

*November 7, 2009*

**Art**

i need to choose a paint where design element and visual element in 1 paint could you help me to choose that paint and telling me what elements in it thank you

*November 7, 2009*

**biochem**

answer is 1,638,400 18 generations original is not included

*September 24, 2009*

**science**

How does a doorbell work?

*May 20, 2009*

**Math - natural log**

Express the given quantity as a single logarithm. ln(1+x^8)+ln(x)- ln(sin(x))

*January 24, 2009*

**communications**

comper btween informative, persuasive,and positive messages

*November 6, 2007*

**AP CHEM!**

ROFL YOU'RE STUPID we're doing this in class right now.... :/

*April 3, 2007*

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