Saturday

July 4, 2015

July 4, 2015

Total # Posts: 1,281

**physics**

Mars has a mass of about 6.45 × 10 23 kg, and its moon Phobos has a mass of about 9.4 × 10 15 kg. If the magnitude of the gravitational force between the two bodies is 4.68 × 10 15 N, how far apart are Mars and Phobos? The value of the universal gravitational...
*December 24, 2010*

**physics**

A car is traveling at 55.1 km/h on a ﬂat highway. The acceleration of gravity is 9.81 m/s 2. a) If the coeﬃcient of kinetic friction between the road and the tires on a rainy day is 0.116, what is the minimum distance needed for the car to stop b) What is the ...
*December 24, 2010*

**12th grade chem**

Which of the following statements about ideal conditions for gases is considered untrue? A. 1 mole of gas occupies 22.4 L at STP. B. 2 moles of gas occupy 22.4 L at STP. C. STP equals 1 atm at 237 K. D. STP equals 101.3 kPa at 273 K.
*December 20, 2010*

**physics**

Your weight is 110 lb. What is your mass in kilograms? Answer in units of kg.
*December 17, 2010*

**physics**

A freight train has a mass of 2.1 × 10^7 kg. If the locomotive can exert a constant pull of 6.2 × 10^5 N, how long would it take to increase the speed of the train from rest to 77.7 km/h? (Disregard friction.)
*December 17, 2010*

**physics**

An object is resting on a flat surface with a coefficient of static friction of 0.65. If the mass os the object is 14Kg, what is the force necessary to start moving?
*December 17, 2010*

**Math**

In "the twelve days of christmas", how many gifts in all did "my true love give to me?
*December 13, 2010*

**Math**

In a twelve-team bowling league, if every team plays every other team four times during the season. How many games must be scheduled?
*December 13, 2010*

**PHYSICS**

A toy car in the figure below runs off the edge of a table that is h = 1.375 m high. The car lands d = 0.375 m from the base of the table. How long did it take the car to fall?
*December 11, 2010*

**spanish**

how do you say history in spanish
*December 9, 2010*

**Math**

How can you take 1 away from 19 and leave 20?
*December 9, 2010*

**math**

a wagon train had ninety-six wagons each carrying the same number of people. when twelve broke down, each of the other wagons had to carry one more person. How many people were in each wagon originally.
*December 8, 2010*

**Math**

If the length of a rectangle is x - 5 and the area is 4x(exponent2) - 12x +9, what is the width?
*December 7, 2010*

**Math**

Find the only four-digit perfect square that is a pair of two-digit squares written side by side?
*December 7, 2010*

**college Chemistry**

Decide if the molecule has a dipole moment, (if the molecule is polar) as follows: a) dipole (polar molecule) b) no dipole (non-polar molecule) c) ionic (not a molecule) d) super covalent e) none of the above 11.) CsF 12.) nitrogen 13.) Methane 14.) ammonia 15.) CH3F
*December 6, 2010*

**Chemistry**

As one descends group 6A of the periodic table, the number of valence electrons found in each element A. Increases B. Decreases C. Remains the same
*December 6, 2010*

**Chemistry**

Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
*December 6, 2010*

**college Chemistry**

(Questions 6 and 7) For the following elements list the electron configuration. Assume it is neutral and in its ground state. 6. Fluorine (a) 1s22s22p1 (b) 1s22s22p63s1 (c) 1s22s22p5 (d) 1s22s22p63s23p64s1 (e) 1s22s1 7. Gallium a)1s22s22p63s23p64s23d104p65s24d105p66s24f1 (b)...
*December 6, 2010*

**Chemistry**

For following problems 1 to 5, classify the bonds as: a) non-polar covalent b) polar covalent c) ionic d) metallic e) super covalent 1.) O-Cl 2.) Li-Br 3.) N-N 4.) N-H 5.) C-S
*December 6, 2010*

**physics**

Does the multiplication of a scalar and a vector display the commutative property? This property states that the order of multiplication does not matter. So for example, if the multiplication of a scalar s and a vector r is commutative, then sr = rs for all values of s and r.
*December 5, 2010*

**physics**

Felicia, the ballet dancer, has a mass of 45.0 kg. a.) What is Felicia's weight on Earth? b.) What is Felicia's mass o Jupiter, where the acceleration due to gravity is 25.0 m/s2? c.) What is Felicia's weight on Jupiter?
*November 30, 2010*

**Pharmaceutical Dosage Forms**

If there is 1 g KH2PO4 and 1 g K2HPO4 in 100mL of solution, what is the mEq/mL of potassium? The Answer is 0.19mEq/mL. But I need to show work on how to get the answer. Textbook Applied physical pharmacy By Mansoor M. Amiji, Beverly J. Sandmann Chapter 3
*November 30, 2010*

**spanish NEED HELP!!!!**

Oh yea I know how to form the past subjunctive... I'm just having problem to fill the blanks. None of them make sense to me. The only ones i got right were the 3rd blank(aprobara) and the 4th blank (fuera). I'm just having trouble putting the correct verb in the ...
*November 29, 2010*

**spanish NEED HELP!!!!**

Es época de elecciones nacionales. Durante el almuerzo, los empleados opinan y discuten de política. Completa el diálogo con los verbos en el imperfecto del subjuntivo. (FILL IN THE BLANKS) WORD BANK: aprobar dedicarse defender estar hablar juzgar saber ...
*November 29, 2010*

**Math**

An object is dropped from a hot-air balloon 1296 feet above the ground. The height of the object is given by h=-16(t-9)(t+9) where the height h is measured in feet, and the time t is measured in seconds. After how many seconds will the object hit the ground?
*November 28, 2010*

**Math**

A kickball is kicked upward with an initial vertical velocity of 3.2 meters per second. The height of the ball is given by h=-9.8t^2 + 3.2t where the height h is measured in feet, and the time t is measured in seconds. After how many seconds does the ball land?
*November 28, 2010*

**physics**

What is the ball’s highest point during its flight? please
*November 26, 2010*

**physics**

A quarterback throws the football to a stationary receiver who is 22.7 m down the field.The football is thrown at an initial angle of 39◦ to the ground. The acceleration of gravity is 9.81 m/s2 . a) At what initial speed must the quarter- back throw the ball for it to ...
*November 26, 2010*

**physics**

A baseball is thrown at an angle of 23◦ relative to the ground at a speed of 22.3 m/s. The ball is caught 36.4649 m from the thrower. The acceleration due to gravity is 9.81 m/s2 . How long is it in the air?
*November 26, 2010*

**Calculus**

A water tank has a shape of an inverted circular cone with base radius 3 m and height of 5 m. If the water is being pumped into the tank at a rate of 2 m^3 /min, find the rate at which the water level is rising when the water is 3 m deep.
*November 22, 2010*

**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*