Wednesday

December 2, 2015
Total # Posts: 872

**College physics**

a person drives northward (90 degrees) at 15m/s in a truck that weighs 2500kg. a second person driving a car that weighs 1600 kg drives southwest (225 degrees) at 16 m/s. They have a perfectly inelastic collision. What is the direction and speed of the two vehicles immediately...
*November 22, 2015*

**science**

a horizontal beam 6.8m long of mass 15kg is supported by pillars of 0.2 of each end. There is a man of mass 85 kg standing 1.7kg from one end of the beam .draw a diagram showing the forces acting on the beam in this equilibrium condition .calculate the magnitudes of the loads...
*November 14, 2015*

**World history**

Thank you
*November 10, 2015*

**World history**

What influenced the scientific revolution?
*November 10, 2015*

**math**

THANK YOU!!
*November 2, 2015*

**math**

The discounted price of a book is 85% of the original price. This is a savings of $3. A sales tax of 8% will be added to the discounted price. What is the original price? the discounted price? and the tax?
*November 2, 2015*

**Math **

4x(x-2)=(2x+1)(2x-3) need help to solve
*October 13, 2015*

**prasanna high school**

Maths quection inam A.P. The sum of first six terms is 6an the product of second term and fifth term is -80. Find the terms of A.P.
*October 8, 2015*

**4**

Bobby has 230 marbles to put in jars. He wants the jars to hold either 100 marbles or 10 marbles. Which is a way he can arrange the marbles?
*October 4, 2015*

**Math Help- Test Tomorrow!**

We were doing review in class today and I remembered this one question I never got(though I don't have the specific question with me anymore). 1. It was a composite function question that asked for 'a' when f(g(a))=1. We were provided with the graphs of f(x) and g(...
*September 22, 2015*

**Math**

The function f(x)=x^2+5x+6 has zeros at -2 and -3. What are the zeros of the function y=-2f(x/11) ? Do you just plug x/11 into each x value in f(x)? Like f(x)= (x/11)^2+5(x/11)+6 (I exclueded the -2 because if I divide 0 by -2, it's still zero)? But then how can you find ...
*September 21, 2015*

**discrete math**

sorry its proof by cases
*September 12, 2015*

**discrete math**

4m+5n^2=20 (proof by cares)
*September 12, 2015*

**Science**

On a 120 km trip a motorist travels 60 km at 60 km/h. How fast must the motorist go for the next 60km in order to average 120km/h for the whole trip? i have attempted this question, yet the answers say it is impossible.
*September 12, 2015*

**Physics**

At a carnival, you can try to ring a bell by striking a target with a 8.46-kg hammer. In response, a 0.411-kg metal piece is sent upward toward the bell, which is 5.22 m above. Suppose that 34.4 percent of the hammer's kinetic energy is used to do the work of sending the ...
*August 27, 2015*

**Physics**

A skier slides horizontally along the snow for a distance of 12.1 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0343. Initially, how fast was the skier going?
*August 27, 2015*

**physics**

The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing indicate. If the coefficient of static friction between a crutch and the ground is 0.793, determine ...
*August 12, 2015*

**physics**

The drawing shows a wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces, and , on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 19.4 N, what is the ...
*August 12, 2015*

**physics**

A 72.2-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.53 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.44 m/s2?
*August 12, 2015*

**Physics**

helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 108-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal acceleration of ...
*August 12, 2015*

**Physics**

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 6.54 m/s. The car is a distance d away. The bear is 26.0 m behind the tourist and running at 10.4 m/s. The tourist reaches the car safely. What is the maximum possible value for d?
*August 11, 2015*

**math algebra**

oh ok thanks!
*July 29, 2015*

**math algebra**

Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990 Im stuck
*July 29, 2015*

**math**

Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990
*July 29, 2015*

**Math **

The roots of x^2-999999x-9999=0 and ? are additive intergers A. x^2+999999x-9999=0 B. x^2-999999x+9999=0 C. x^2+999999x+9999=0 D. x^2-9999x-999999=0
*July 28, 2015*

**math**

The roots of x^2-999999x-9999=0 and ? are additive intergers A. x^2+999999x-9999=0 B. x^2-999999x+9999=0 C. x^2+999999x+9999=0 D. x^2-9999x-999999=0
*July 28, 2015*

**math**

When n= ?, one term in the expansion of (2x^2+3x+2)^n is 1024. A. 4 B. 8 C. 9 D. 10
*July 28, 2015*

**Math**

One solution contains 25% as much water as alcohol and another solution contains 5 times as much water as alcohol. How many gallons of each solution must be mixed in order to obtain 7 gallons of the new solution which contains as much water as alcohol? Please help. I don't...
*July 27, 2015*

**physics(kinematics)**

Thanks guys, I really appreciate your effort.
*July 19, 2015*

**physics(kinematics)**

The acceleration of a particle is defined by the relation a=-8m/s2. Knowing that x=20m when t=4 and that x=4m when v=16m/s. Determine. A)the time when the velocity is zero. B)the velocity and total distance traveled when t=11s.
*July 19, 2015*

**Biology**

1 bacteria 2 I don't know 3 cells?
*July 15, 2015*

**Biology**

1) Mucus traps __________. 2) The windpipe is lined with sticky __________ and microscopic __________. 3) Tiny microscopic __________ are called cilia.
*July 15, 2015*

**Chemistry Please Help Thanks!**

Calculate the volume of solution that has a vapour pressure of 25.8 mbar and contains 200.3 g of galactose, C6H12O6, at a temperature of 22.0 °C. The vapour pressure of pure water at 22 °C is 26.40 mbar, the density of water is 1.00 g mL-1, and assume no change in ...
*June 4, 2015*

**Physics**

Two ropes are attached to a wagon, one horizontal to the west with a tension force of 40 N and the other east at an angle of 23° northward and a tension force of 50 N. Find the components of the net force on the cart
*May 18, 2015*

**math**

The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students?
*May 14, 2015*

**calculus**

Please do,I'm waiting...
*May 8, 2015*

**calculus**

Integral of 1/[x^2(1+x^2)]
*May 8, 2015*

**math stuck please help!!!**

A private plane traveled from Seattle to a rugged wilderness , at an average speed of 252 mph . on the return trip , the average speed was 180 mph . if the total time was 9 hours how far is Seattle from the wildness
*May 8, 2015*

**calculus(urgent pls) **

Integral of 1/[x^2(1+x^2)]
*May 8, 2015*

**chemistry**

Higher signal to noise signal ratios can be achieved in FTIR spectra compared to spectra from dispersive ir instrument. how is such a useful feat achieved in ftir
*May 8, 2015*

**Calculus(URGENT PLS!!!)**

Find the integral of (e^cosx)sinx
*May 8, 2015*

**Maths(URGENT ANSWER please )**

Find the sum to infinity of the series 1 + 4/3! + 6/4! + 8/5!
*May 2, 2015*

**Maths(URGENT ANSWER please :**

The book says the a answer is 2
*May 2, 2015*

**Maths(URGENT ANSWER please :**

Find the sum to infinity of the series 1 + 4/3! + 6/4! + 8/5!
*May 2, 2015*

**Chemistry**

I just need help with these three 1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) 2. ...
*April 22, 2015*

**If you answer these questions I will pass this cla**

1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) How many liters of carbon dioxide ...
*April 22, 2015*

**Chemistry**

Can I call someone and talk to them
*April 22, 2015*

**Math**

Will a cylinder always have a larger volume than a rectangular prism?
*April 22, 2015*

**Math**

The triangular prism has a height of 17.5 in and a base area of 14.5 in. The rectangular prism has dimensions of 10 x 5 x 6, and the cylinder has a height of 6 in and a dimater of 8 in.
*April 22, 2015*

**Math**

A cylinder fish tank has a volume of 301.44, a rectangular fish tank as a volume of 300, and a triangular prism tank has a volume of 253.75. Obviously the cylinder tank holds more water, but is there a mathematical reason why other than its bigger?
*April 22, 2015*

**english**

Thanks!
*April 20, 2015*

**english**

We have to find the right linking verb. 1.) It was she/her who was the director. She 2.) The owner of the recording equipment was me/I. I 3.) The engineer helping with the recording was her/she. She 4.) The person testing how the microphone sounded was I/me. I 5.) The ...
*April 20, 2015*

**math**

show that : cos(360*+x)-tan(180*-x)sin(360*-2x)cos(-x) divided by sin(90*+x)=cos2x
*April 16, 2015*

**math**

show that : cos(360*+x)-tan(150*-x)sin(360*-2x)cos(-x)/ sin(90*+x)=cos2x
*April 16, 2015*

**Maths(URGENT pls!!!)**

Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6)
*April 10, 2015*

**Mathw(URGENT pls)**

Yes,your answer is correct. Can you please show your workings?
*April 9, 2015*

**Mathw(URGENT pls)**

Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6)
*April 9, 2015*

**Maths (URGENT!!!)**

2).Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6)
*April 9, 2015*

**math**

now that we know its a typo can we just try and solve it?
*April 9, 2015*

**math**

im sick at home so i can't ask her
*April 9, 2015*

**math**

i know. That is how the problem was written
*April 9, 2015*

**math**

Bobby has been driving at a constant speed for the last 30 minutes. If Bobby is traveling at a speed of 70 miles per hour, which equation best represents the relationship between time in hours(c) and distance in miles (d). A. d = 70t B. t = 70d C. d = t + 70 D. t = d + 70 ...
*April 9, 2015*

**Algebra**

How much metal is need to build a trough 6 ft long and 2 feet wide?
*March 30, 2015*

**Algebra**

How much metal is need to build a trough 6 ft long and 2 feet wide?
*March 29, 2015*

**physics**

a force of 150N does 3.40kj of work over a displacement of 25.0m. what is the angle between the force vector and the displacement vector?
*March 26, 2015*

**Physics**

It takes a force of 53kN on the lead car of a 16-car passenger train with mass 9.1x 10^5 kg to pull it atconstant 45 m/s on level tracks. (a) What power must the locomotive provide to the lead car? (b) How much more power to the lead car than calculated in pan (c) Would be ...
*March 23, 2015*

** Vector **

A boy can swim with a speed of 26metre per minute in still water. Be wants to swim across a 150metere wide river from point A to point B directly opposite on the other side of the River.The river flows at 10metre per minute (a)if he always swims in the direction parallel toAB,...
*March 22, 2015*

**statistics**

There is a multiple choice exam with 24 questions, and five options each. If i guess every question, what is the probability that i will get exactly 15 correct.
*March 17, 2015*

**Integration**

I got stuck here,can you please proceed/complete it
*March 12, 2015*

**Integration **

Integral of XarcsinX dx. ii)X^2.arcsinX dx
*March 12, 2015*

**L.A**

Thank you!
*March 10, 2015*

**L.A**

is 10 b? 11, b? 12, c?
*March 10, 2015*

**L.A**

1. I sit on the bank in my special place 2. feel the breeze that life my hair 3. and watch the ripples run across the river 4. it is so peaceful here 5. deep enough to justify a fishing pole 6. quiet enough for my every thought 7. the perfect place to contemplate 8. the world ...
*March 10, 2015*

**language arts**

Be still, sad heart! and cease repining; Behind the clouds is the sun still shinning; thy fate is the common fate of all, into each life some rain must fall some days must be dark and dreary 1. from the context, what do you conclude is the probable meaning of repining in the ...
*March 10, 2015*

**physics**

A constant torque of 200Nm turns a wheel about its centre. The moment of inertia about this axis is 100kgm^2
*March 3, 2015*

**physics(urgent answer pls)**

A projectile is launched with 30m/s at an angle of 60degree with d horizontal (a) find d position of the projectile,and d magnitude and direction of its velocity at t=2s (b) find d time when d ball reaches the highest point (c) find d horizontal range
*March 1, 2015*

**art**

A conservator is working to restore a large marble statue from a Greek temple by scrubbing it with water and soap. What is a likely drawback to this preservation? A. Breaking of large sections of marble during scrubbing. B. Removing the aged look of the statue during scrubbing...
*February 24, 2015*

**Physics**

Thank you
*February 18, 2015*

**Physics**

A box slides down a 27.7° ramp with an acceleration of 1.25 m/s². The acceleration of gravity is 9.8 m/s². Determine the coefficient of kinetic friction between the box and the ramp.
*February 18, 2015*

**maths(urgent answer pls)**

1).Find the sum of the n terms of the series Sn=1^2 + 3^2 +5^2+...+(2n-1)^2 2).Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6) +.... 3) Sum to n terms,the series 1.3.5 + 2.4.6 + 3.5.7 +.
*February 15, 2015*

**MATHS(sum of series)**

Finding the sum of the first 2 terms of the series with the above formula won't get you the right answer
*February 15, 2015*

**MATHS(sum of series)**

1).Find the sum of the n terms of the series Sn=1^2 + 3^2 +5^2+...+(2n-1)^2 2).Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6) +.... 3) Sum to n terms,the series 1.3.5 + 2.4.6 + 3.5.7 +..
*February 15, 2015*

**trig**

I am currently taking a trig class. I need help understanding how to solve for sin,cos, and tan in problems which give an angle and a side length or the hypotenus. Any help would be muchly appreciated
*February 11, 2015*

**LAnguage arts**

Which sentence correctly uses a predicate pronoun as a subject complement? a. The last arrivals were Joe and I b. this year's soccer champions were lana and me c. the tribute deeply touched my brother and i d. my boyfriend became my best friend is it a?
*February 10, 2015*

**language arts**

I'm sorry I copied d wrong. It's "the weather today seems very humid today" is d still right?
*February 10, 2015*

**language arts**

is it d?
*February 10, 2015*

**language arts**

Which sentence contains a predicate adjective? a.The singers latest hit is a beautiful song b. The bus has arrived at last c. We bought four juicy apples at the farmers market d. the weather seemed nice today is it a or d?
*February 10, 2015*

**language arts**

1. Which sentence contains a predicate adjective? a. The singer's latest hit is a beautiful song b. The bus has arrived at last c. We bought four juicy apples at the farmers market d. the weather today seems very humid to me 2. which sentence correctly uses a predicate ...
*February 10, 2015*

**English**

Thanks!
*February 9, 2015*

**English**

Do you have anything?
*February 9, 2015*

**English**

No... She said to choose anything to write about. I love writing but I can never think of any good ideas. I want to have a really good paper. My problem is thinking of ideas. I wish I had a really imaginative mind.
*February 9, 2015*

**English**

I have to write a poem or a story for my English class. Do you have any ideas?
*February 9, 2015*

**stats**

If Gallup has used an sis of size n=1021 and obtained the sample proportion p= 0.52 ,you can calculate that the margin of error for 95% confidence would be
*February 9, 2015*

**stats**

Joes test score was 450(1 standard deviation below the population mean550) A good guess for Joes test score is
*February 8, 2015*

**Math**

A=2600e^0.08^t % increase each year
*January 28, 2015*

**L.A**

"Yearnings" The slab of clay before me, lifeless and lacking ambition, refuses to be molded. "Shape your dreams!" The art teacher says. "Let your hands talk to your hearts!" Nothing- Just unshaped dreams, silent hands, and hardening clay on a ...
*January 27, 2015*

**language arts**

what do you mean? they are not the same as mine
*January 27, 2015*

**language arts**

which question should you ask during your third read of multi draft reading process? 1. who is the speaker, or the voice that "says" the words of the poem? 2. How has the work expanded my ideas-or my imagination? 3. What do the word choices and imagery tell me about ...
*January 27, 2015*

**math**

what is the square root of mx and b?
*January 26, 2015*