Wednesday

November 25, 2015
Total # Posts: 1,353

**physiscs**

a 15g bullet is fired horizontally into a block of wood with mass 2.5 kg and embedded in the block, Initially the block of wood hangs vertically and the impact the bullet just before the impact.
*November 21, 2010*

**5th grade Maths**

With help of the 10 equilateral triangles of side 3 cm, 8 rectangles of 4*2 cm and 4 square of 3*3 cm make 3 structures using all the figures. find the perimeter of all the triangles, squares, and rectangles??
*November 19, 2010*

**physics**

none. 0. for work to be done the object has to have displacement, and even though you were exerting force, the box didnot move and s work is o.
*November 17, 2010*

**physics**

A 2 kg rock is released from rest at a height of 29 m. Ignore air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights;20m 15m 9m * physics - bobpursley, Wednesday, November 17, 2010 at 9:32am...
*November 17, 2010*

**Precalculus**

amp is 9, period os (2pie)/(pie/5) and phase shift is (pie/5)/7
*November 17, 2010*

**College Algebra**

its a simple matrix problem. ti-89 does it for you.
*November 17, 2010*

**physics**

A man runs with a speed of 6 m/s off a platform that is 10m above the water. How fast is he moving when he heats the water
*November 17, 2010*

**physics**

Please help me A 2 kg rock is released from rest at a height of 29 m. Ignore air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights;20m 15m 9m
*November 17, 2010*

**Chemistry**

What is the balanced molecular equation and their physical state of each substance of silver(I) nitrate and 6 M hydrochloric acid?
*November 17, 2010*

**chemistry**

What is the balanced molecular equation and their physical state of each substance of barium chloride and 3 M sulfuric acid?
*November 17, 2010*

**chemistry**

yes. the reactant of those two and the product
*November 17, 2010*

**College Algebra **

i could do this in 9th grade. youshould drop out and work at taco bell
*November 17, 2010*

**college chemistry**

use M1V1=M2V2. dont need to change units
*November 17, 2010*

**physiscs**

A man runs with a speed of 6 m/s off a platform that is 10m above the water. How fast is he moving when he heats the water
*November 17, 2010*

**physiscs**

A 2 kg rock is released from rest at a height of 29 m. Ignore air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights;20m 15m 9m
*November 17, 2010*

**College Algebra**

this is 11th grade highschool math. if you dont know this drop out now before you waste aany more of your parents' money
*November 16, 2010*

**chemisrty**

as a system increases in volume it absorbs 52.5 j of energy in the form of heat form the surroundings. the piston is working against a pressure of 5.00 atm. The final volume of the system is 58,0 L. What is the initial volume of the system if the internal energy of the system ...
*November 16, 2010*

**physiscs**

A 10g sample of an unknown ionic compound is dissolved, and the solution is treated with enough AgNO3 to precipitate all the chloride ion. If 30.1 g of AgCI are recovered, which of the following compound could be the unknown? A. NaCI B. NaNO3 C.BaCI2 D. Mg CI2 E.KCI Pleas help...
*November 14, 2010*

**Physics. **

A hilly road has a 20 m radius top to one of its hills. What is the minimum speed for a car to just leave the road at the top of this hill?
*November 13, 2010*

**Physics. **

A stack of papers in the rear of a delivery truck moving at 20m/s has a 20kg mass. What is the minimum radius the truck can turn for the papers not to slip if coefficient of static friction is 0.3?
*November 13, 2010*

**physics**

never mine i got the answer =4.9
*November 11, 2010*

**physics**

Find the acceleration (mls^2) of the masses, given that m1= 1.0kg, m2= 2.0kg and m3= 3.0kg . Assume the table is frictionless and the masses move freely.
*November 11, 2010*

**physics **

never minded i got it. it will remain the same
*November 11, 2010*

**geomtry**

EF is a median of trapezoid ABCD. What is the value of x?
*November 11, 2010*

**3rd grade**

whats the homonym for the word flower??
*November 9, 2010*

**physics**

42.77 RPM
*November 8, 2010*

**Math**

I'm a seventh grade student, I'm having a hard time trying to understand how to do nth term, where n represents the position of the term?
*November 7, 2010*

**physics**

A 4111.0 kg truck is parked on a 14.6° slope. What is the friction force on the truck?
*October 30, 2010*

**physics**

A motorboat traveling on a straight course slows down uniformly from 75km/h to 40km/h in a distance of 50m. What is the boat’s acceleration?
*October 28, 2010*

**physics**

A motorboat traveling on a straight course slows down uniformly from 75km/h to 40km/h in a distance of 50m. What is the boat’s acceleration?
*October 28, 2010*

**physicsss**

A Thompson’s gazelle can reach a speed of 13 m/s in 3.0 s. A lion can reach a speed of 9.5 m/s in 1.0 s. A trout can reach a speed of 2.8 m/s in 0.12 s. Which animal has the greatest acceleration?
*October 28, 2010*

**Chemistry**

I need help starting this problem: A piece of dry ice (solid carbon dioxide) with a mass of 4.50 g is sealed inside a 2.0 L bottle, and allowed to sublime. At 22.0 degrees Celsius, what is the partial pressure of the CO2 in the bottle? (Assume that all of the CO2 in the sealed...
*October 27, 2010*

**Chemistry**

Calculate the molar solubility of BaSO4 in a solution in which [H3O+] is 2.5 M. I can almost solve this on my own. If you know the following equations: BaSO4 = Ba2+ + SO42- SO42- + H+ = HSO4- HSO4- + H+ = H2SO4 and I know [H+] = 2.5 M along with the following equation: [Ba2...
*October 25, 2010*

**physiscs**

mass of 0.2 kg is attached to a spring of negligible mass. I the mass executes simple harmonic motion with a period of 0.5 s, what will be the spring constant/ Can I use the following formula to solve this problem k = (4pi square x mass) / T square
*October 24, 2010*

**Chemistry**

A mass of 0.2 kg is attached to a spring of negligible mass. I the mass executes simple harmonic motion with a period of 0.5 s, what will be the spring constant/ Can I use the following formula to solve this problem k = (4pi square x mass) / T square
*October 24, 2010*

**chemisty**

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum? please can you explain what fraction do I need to use. Based on the given information I can find the %theoretical of water in angydrous Alum. But I still don't understand how to...
*October 21, 2010*

**chemistry**

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum?
*October 21, 2010*

**English grammar**

In the question "Where are the spoons?", what is "where"? adverb? preposition? please explain why
*October 20, 2010*

**college Geol 101**

Suppose you have a sample of clamshell at a Paleoindian site and you measure the 14C activity of a 100-gram sample of carbon as 320 disintegrations per minute (or 3.2 disintegrations per gram of carbon per minute). a.What was the activity (in disintegrations per minute) for ...
*October 20, 2010*

**algebra**

An executive invests $25,000, some at 8% and some at 4% annual interest. If he receives an annual return of $1600, how much is invested at each rate?
*October 14, 2010*

**Calculus III**

Give an Example where f(x) is greater than or equal to 0 but f(x) is not decreasing and the integral converges while the series diverges or vice versa.
*October 12, 2010*

**chemistry**

a stone ax head was dug up at an arcchaeological site. it was estimated to be about 3,200 years old. is it possible that its age could be determined using carbon- 14?
*October 12, 2010*

**Calculus**

Give an Example where f(x) is greater than or equal to 0 but f(x) is not decreasing and the integral converges while the series diverges or vice versa.
*October 12, 2010*

**physics**

what kind of information is indicted by a graph of the acceleration due to gravity versus ball's mass if the slope of the curve is zero?
*October 11, 2010*

**math 157**

at the first tri city meeting where 8 people are from twon A 7 people are from town B and 5 people are from town C. If the council consists of 5 people find the probability that 3 people are from town A and 2 people are from town B. How do i do this
*October 10, 2010*

**math 157**

at the first tri city meeting where 8 people are from twon A 7 people are from town B and 5 people are from town C. If the council consists of 5 people find the probability that 3 people are from town A and 2 people are from town B. How do i do this
*October 10, 2010*

**chemistry**

Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. independent of the chemical identity of the solute. C. dependent on the ...
*October 4, 2010*

**Physics**

A cart has a constant acceleration of a = 2m/s2. At a certain instant its speed is 5 m/s. What is its speed 2 s later and 2 s earlier?. What is its average speed during the time interval of 4s.?
*October 3, 2010*

**computer history**

When was the first computer created, and by whom?
*September 27, 2010*

**algebra**

The percent of increase is 16%. The new number is 522. What was the original number?
*September 27, 2010*

**Science**

What experiment did Rudolph Virchow do to discover that cells come from cells?
*September 25, 2010*

**Science**

What experiment did Matthias Schleiden do? What prior information did he use to help him with his research/discovery? What tools did he need to complete his experiment?
*September 21, 2010*

**Science **

What experiment did Rudolph Virchow do? What prior information did he use to help him with his research/discovery? What tools did he need to complete his experiment?
*September 21, 2010*

**physiscs**

For other viewers who didn't understand like Ray.. Since its not oscillating there is no period, therefore it is 0.
*September 21, 2010*

**physics**

One of the fastest recorded pitches in major-league baseball, thrown by Billy Wagner in 2003, was clocked at 101.0 mi/h. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away? ___ft
*September 21, 2010*

**physics**

The best leaper in the animal kingdom is the puma, which can jump to a height of 11.5 ft when leaving the ground at an angle of 52°. With what speed, in SI units, must the animal leave the ground to reach that height? ___m/s
*September 21, 2010*

**word search puzzle**

moving about in a clumsy, noisy way
*September 20, 2010*

**calculus**

Im sorry ... it is a derivative question... it says to use the power rule
*September 18, 2010*

**calculus**

x = 6 h(x) = (x-1/2 + 5x)(1 - x-1)
*September 18, 2010*

**English**

i really dont care learning about paul revere i just want the answer to my question so i wont have to let my partner down.
*September 16, 2010*

**English**

it would be alot easier if you did do it for me
*September 16, 2010*

**English**

i dont need no biographies i need a list of contributions because i dont understand the question
*September 16, 2010*

**English**

Paul Revere, what are some major contributions that he did for the government
*September 16, 2010*

**Math Problems**

Dave receives $5.80 per hour and 3% commission on sales. One week he worked 35 hours and sold $2,218 worth of goods. How much did he earn that week?
*September 16, 2010*

**Math **

thks
*September 14, 2010*

**Math **

What is the average births per day if the average birth per second is 4 1/5? What is the average deaths per hour if the average death per second is 1.7?
*September 14, 2010*

**math**

The meter reading on January 17 was 7952 CCF. The meter reading on February 17 was 8103 CCF. How many units of gas were used?
*September 14, 2010*

**design**

rewrite them using performance objectives/ 1. Understand how a car works 2. Know how to write a term paper using APA format 3. Comprehend the differences between mammals and reptiles 4. Know how to write a performance objective 5. Use JavaScript effectively on a Web page 6. ...
*September 3, 2010*

**accounting help please?!**

Nancy Sly wishes to sell her business and receives the following three offers:? 1. $568,000 cash immediately. 2. $200,000 cash now plus an annual installment of $60,000 at the end of each year for 10 years, a total of $800,000. 3. An offer to manage the property for 10 years ...
*September 2, 2010*

**accounting help please?!**

Nancy Sly wishes to sell her business and receives the following three offers:? 1. $568,000 cash immediately. 2. $200,000 cash now plus an annual installment of $60,000 at the end of each year for 10 years, a total of $800,000. 3. An offer to manage the property for 10 years ...
*September 2, 2010*

**english check answer**

its fine you dont actually help
*August 28, 2010*

**english check answer**

1) wary 2) inclination 3) dilemma 4) Sabotage 5) Retort 6) zeal 7) 8) demoralize 9) Irrate 10) Subsequent words Curt, Demoralize, dilemma,inclination, irate, retort, sabotage, subsequent, wary,zeal if my carpets need cleaning or i want a new cellphone plan. I will do some ...
*August 28, 2010*

**english vocab**

__________ 1-2 Already angry,the customer became more ___ when he __________ received only this __ response: No return. _______ 3-4 when I answer my phone and hear someone demand, "who is this?" _______ my _ is _ to "I'm the person whose phone was ringing. ...
*August 28, 2010*

**chemistry**

4.4g/cm3
*August 27, 2010*

**algebra**

Order from least to greatest: 1/3, 1/6, 1/4. Is it 1/3. 1/4, 1/6?
*August 5, 2010*

**chemistry**

A solution contains naphthalene(C10H8) dissolved in hexane (C6H14) at a concentration of 14.52 % naphthalene by mass.Calculate the vapor pressure at 25 degrees C of hexane above the solution. The vapor pressure of pure hexane at 25 degrees C is 151 .
*August 5, 2010*

**Chemistry**

To what volume should you dilute 124 mL of an 8.10 M CuCl2 solution so that 52.0 mL of the diluted solution contains 5.9 g CuCl2
*August 4, 2010*

**Chemistry**

How much heat (in kJ) is evolved in converting 1.00 mol of steam at 145.0 degrees C to ice at -45.0 degrees C? The heat capacity of steam is 2.01 J/g* degrees C and of ice is 2.09 J/g*degrees C .
*August 4, 2010*

**college**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal. d. The graph of a ...
*August 1, 2010*

**BIOLOGY**

thanks but i AM aware of the seaching techniques i was just unsure of some stuffs i'll assume you dont have the answers to my questions thanks anyways
*August 1, 2010*

**BIOLOGY**

True of false: 1. The Bohr effect explains the manner in which pH changes the binding affinity of hemoglobin for O2. i think this is true 2. Hemoglobin binding affinity increases as Po2 increases. im not sure about this 3. O2 will passively diffuse and bind with hemoglobin ...
*August 1, 2010*

**substance**

a page of a textbook is 7 1/2 wide. the pages are divided into three equal columns with 3/8 in between how wide is each column
*July 31, 2010*

**diffrential equations**

Find two linearly independent power series solutions to the diffrential equation. State the first 3 therms of each series: 2x^2y''+xy'-(1+2x^2)y=0
*July 28, 2010*

**Statistics**

3. Indicate whether the given statement could apply to a data set consisting of 1,000 values that are all different. a. The 29th percentile is greater than the 30th percentile. b. The median is greater than the first quartile. c. The third quartile is greater than the first ...
*July 25, 2010*

**Statistics**

What is the stardard deviation using the rull of thumb for each set of numbers: 57,61,57,57,58,57,61 61,52,69,64,46,554,47
*July 25, 2010*

**PHYSICS**

Original Q: If you pour liquid into a tall, narrow glass, you may hear sound with a steadily rising pitch. What is the source of the sound? And why does the pitch rise as the glass fills? Additional question from me: What does it mean by the source of the sound? like the ...
*July 20, 2010*

**Chemistry (WebWorks)**

Def correct: iii ii v v vii viii
*July 19, 2010*

**geometry**

what is the area of a rhombus if AB equals 9.9 and AC equals 13 and DB equals 15?
*July 19, 2010*

**College Physics.**

really?? but how would i find L?
*July 18, 2010*

**College Physics.**

A pendulum has a period of 1.8 s. a) Its mass is doubled. What is its period now? b) Its length is doubled. What is its period now? The original pendulum is taken to a planet where g = 16 m/s2. c) What is its period on that planet?
*July 18, 2010*

**College Physics 121**

A spring with a spring constant k = 50N/m has an unstretched length of 20cm. Find the work required to stretch the spring to a length of 30 cm. W = J ?? any help guys?
*July 18, 2010*

**physics hw need help**

A disk with a radial line painted on it is mounted on an axle perpendicular to it and running through its center. It is initially at rest, with the line at q0 = -90°. The disk then undergoes constant angular acceleration. After accelerating for 3.1 s, the reference line ...
*July 14, 2010*

**Physics 121 HW**

A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. A guy wire at 23° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the ...
*July 14, 2010*

**physics 121 hanging sign**

do i need to do the x,y for the rod?
*July 14, 2010*

**physics 121 hanging sign**

how would i find that? divide the mass by the weight of the wire?
*July 14, 2010*

**physics 121 hanging sign**

i got .227 but its the wrong answer?
*July 14, 2010*

**physics 121 hanging sign**

A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. A guy wire at 23° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the ...
*July 14, 2010*

**Physics 121 **

how do i find the hight for b?
*July 14, 2010*

**Physics 121 **

A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 2.7 m down a q = 23° incline. The sphere has a mass M = 4.8 kg and a radius R = 0.28 m. a) Of the total kinetic energy of the sphere, what fraction is translational? KEtran/...
*July 14, 2010*

**finance**

Your best taxable investment opportunity has an EAR of 4%. Your best tax-free investment opportunity has an EAR of 3%. If your tax rate is 30%, which opportunity provides the higher after-tax interest rate?
*July 14, 2010*