Sunday

February 19, 2017
Total # Posts: 1,158

**Physics**

A 1140 kg car traveling south at 24 m/s with respect to the ground collides with and attaches to a 2550 kg delivery truck traveling east at 16 m/s.

*February 13, 2017*

**Probability, Stats**

For every 1000 batteries produced by a manufacturer 15 are defective. What is the probability that 100 randomly chosen batteries will have exactly 2 defective batteries?

*January 29, 2017*

**Chemistry**

I did again, using (molecular weight 16.0) and (atomic weight 40.0), instead of the molar masses to convert from g to mol and I used a 50g imaginary sample. It is pretty close to 500. torr, maybe just a rounding error?

*January 22, 2017*

**Chemistry**

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr? I am coming out with 443torr, but the listed options are 80.0 torr b. 200. torr c...

*January 22, 2017*

**Chemistry**

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr?

*January 22, 2017*

**Math**

There are 132 people seated in the school auditorium for an assembly. There are 6 rows in the auditorium, each with the same number of seats. If the auditorium is completely filled, how many seats are there in each row?

*December 21, 2016*

**math**

use a arrow notation to write a rule for this translation (2,1) (5,3) (-1,4) ?

*December 6, 2016*

**language arts**

1. which of the following sentence contains a linking verb ? A. Teresa wore her fav shoes today. b. her shoes look really comfortable c. she put them on with striped socks d. Teresa walked for hours without a complaint ! I'm not sure whts the answer , I think its A or b , ...

*December 4, 2016*

**math**

2. is D n 4. is b , wht is 3 n 1?

*December 1, 2016*

**math**

1. determine which order pair is a solution of y = -5x + 10 A. (-15,5) **** B. (2,0) C. ( -1 , -5 ) D. (3, 25 ) 2.on which of the following lines does the point ( 7,1 ) lie? A. y-5x = 4 B. y=x -10 C. y = -4x +3 *** D. y + -x +8 3.find the slope of the line through ( -9 , -10...

*December 1, 2016*

**math**

Four friends contribute sums of money to a charitable organization in the ratio of 2:4:5:7. if the largest amount contributed is $1.40, calculate the total amount contributed used by the four people?

*November 23, 2016*

**Chemistry**

Before small batteries were available, carbide lamps were used for bicycle lights. Acetylene gas, C2H2, and solid calcium hydroxide were formed by the reaction of calcium carbide, CaC2, with water. The ignition of the acetylene gas provided the light. Currently, the same lamps...

*November 22, 2016*

**Chemistry**

A sample of carbon monoxide was collected over water at a total pressure of 752 torr and a temperature of 15°C. What is the pressure (in torr) of the carbon monoxide?

*November 21, 2016*

**math-mechanics 1**

i solved a)u=2i and b)r=2t+1/2[-0.4(i) 0,2(j)] at c) i don t have idea how to solve At time t = 0, a small boat is at a buoy travelling due east with speed 2 ms?1 . The boat experiences a constant acceleration of (– 0.4i + 0.1j) ms?2 . The unit vectors i and j are ...

*November 21, 2016*

**math**

A girl swims across a river. When she swims in still water, she swims at 1.25 m/s, the river flows parallel to its banks at v m/s. The girl aims to swim upstream at angle ? degrees parallel to the river bank so that her resultant velocity of 1 m/s is along AB, perpendicular to...

*November 20, 2016*

**Chemistry**

How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be mixed with 165 mL of coffee at 91.0°C so that the resulting combination will have a temperature of 62.1°C? Assume that coffee and water have the same density and the same specific heat (4....

*November 15, 2016*

**Chemistry**

Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) arrow CaO(s) + CO2(g). What mass of lime can be produced from 2001.2 kg of limestone?

*October 31, 2016*

**Chemistry**

For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?

*October 31, 2016*

**math**

At a sports festival half the number of people that chose basketball, chose football. The number of students who chose basketball was a quarter the number of students who chose baseball. There were 84 more students who chose baseball than soccer. How many chose basketball?

*October 29, 2016*

**Math**

Two 2 1/2 inch plastic strips and two 5 1/3 inch plastic strips are used to form a rectangle. What is the Perimeter of the rectangle?

*October 18, 2016*

**Physics**

A 1.55 m tall person lifts a 1.80 kg book off the ground so it is 1.95 m above the ground. A.) What is the potential energy of the book relative to the ground? B.) What is the potential energy of the book relative to the top of the person's head?

*October 16, 2016*

**Chemistry**

In order to determine the concentration of a solution of Carbonic Acid (H2CO3), a sample was placed in a buret and titrated with 0.1132 M Sodium hydroxide. For the carbonic acid, the initial reading was 11.0ml and final reading was 31.0 ml. For sodium Hydroxide, the initial ...

*October 14, 2016*

**Maths**

The sum of 26 and a number equals 3 times the number Have to define a variable ,then write equation

*October 4, 2016*

**Math**

70*20*20

*October 1, 2016*

**math**

Kyle and Andrew decide to make some money by raking leaves in their neighborhood. The houses in their neighborhood each have half acre lawns. Kyle and Andrew each start by raking the leaves from their own yards. Kyle realizes it takes him 3 hours to rake one yard and Andrew ...

*September 30, 2016*

**Physics (Mechanics)**

A bat makes contact with a ball 0.8 meters above the ground. The ball then travels with a speed of 22 m/s, moving up. How high does it go?

*September 17, 2016*

**Psychology**

China and Singapore are examples of what type of economies?

*September 12, 2016*

**Math**

Given 800 matches, what is the largest figure in the series(ie what value of n) that you could construct and how many matches would you have left over at the end?

*September 12, 2016*

**Algebra**

Hey! I need some help with this question! I totally forget how to do these types of problems! 1 over 2.75 = 1 over 3.2 - 1 over x ( 1/2.75 = 1/3.2 - 1/x) / = fraction bar

*August 22, 2016*

**control structures**

A store uses the following policy to award discount. If the customer purchases products costing more than ksh 30,000 she is given a discount of 10%, otherwise she is given a discount of 2%. Write a complete C++ program that allows a user to input the total value of purchases ...

*August 21, 2016*

**COM 425**

Organizational innovation is a planned and direction change intended to 1) get an advantage over the organization's competition 2) improve the organization's upper hierarchy 3) address problems and improve organizational performance 4) dismantle organizational rules ...

*July 29, 2016*

**Math**

Which letter on the number line above represents 6?

*July 27, 2016*

**Math**

Then there would 9 and 2/5 pieces left.

*May 12, 2016*

**Computer science**

How is creating a virtual ecosystem similar from the real world?

*May 8, 2016*

**Msth**

The first 10 miles of a taxi ride for free each additional mile cost $0.45 John takes a taxi ride across town and it's a driver $4 write an expression to represent the cost of M miles

*May 5, 2016*

**Math**

The number of blocks has nine in the ones place the numbers in the hundreds place is one more than the number in the tens place there are two numbers equal 11 how many block are there

*April 28, 2016*

**Algebra**

A farmer has 20 acres to plant in wheat and barley. He has to plant at least 15 acres. Wheat costs $200 per acre to plant and barley costs $150 per acre, and the farmer has only $2400 to spend. If the estimated profit of an acre of wheat is $450 and the estimated profit of an ...

*March 24, 2016*

**Algebra**

Bakery has bought 250 pounds of muffin dough. They want to make waffles or muffins in half-dozen packs out of it. Half a dozen of muffins requires 1 lb of dough and a pack of waffles uses 3/4 lb of dough. It take bakers 6 minutes to make a half-dozen of waffles and 3 minutes ...

*March 24, 2016*

**Algebra**

The first group was responsible for making 160 suits while the second group was responsible for making 25% fewer suits in the same amount of time. The first team made 10 more suits each day than the second team and finished its job 2 days before the deadline date. How many ...

*March 22, 2016*

**Algebra**

A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12 km/hour.

*March 22, 2016*

**Algebra**

A ship traveled 150 km with the current, and then turned around and traveled back, spending 5h and 30 min on its trip. Find the speed of the current if the speed of the ship in still water is 55 km/hour.

*March 22, 2016*

**Algebra**

A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to A, if the entire ...

*March 22, 2016*

**Algebra**

An automobile covered the distance of 240 km between A and B with a certain speed. On its way back, the automobile covered half of the distance at the same speed and for the rest of the trip he increased his speed by 10 km/hour. As a result, the drive back took him 2/ 5 of an ...

*March 22, 2016*

**politcal science**

Ralph Nader

*March 20, 2016*

**Math**

The units digit of a two-digit positive integer is 4. If the tens digit and units digit of the number are switched, the new number is 45 less than the original number. What is the sum of the original and the new number?

*March 17, 2016*

**Algebra 2**

Log base 5 of 16 cubed. Times log base 11 of 6 squared. Equals logx.

*March 4, 2016*

**Algebra**

identify the initial amount a and the growth factor b in the exponential function g(x)=14*2^x a=14, b=x a=14, b=2 a=28, b=1 a=28, b=x

*February 29, 2016*

**L.O**

Nobody can answer this question but you. What do you think it is?

*February 27, 2016*

**SCIENCE**

what is the question you are asking?

*February 27, 2016*

**English**

Thanks Ms. Sue! You are a great help!

*February 27, 2016*

**English**

hi I need help with this. It is a section from the story 'The Sniper' and it is a PEE (Point, Evidence, Explanation) question... PLEASE HELP ME. Here is the question: "The writer says that the sniper's eyes had 'the cold gleam of the fanatic' what does...

*February 27, 2016*

**English**

What i do is i look for historical events for example example World War 2 and i write about that

*February 27, 2016*

**Math**

How do you find the point of intersection(s) for x = 2y2 + 3y + 1 and 2x + 3y2 = 0 A) You cannot find points of intersections for non-functions. B) Plug in 0 for x into both equations and solve for y. Then plug that answer back into the other equation to find the corresponding...

*February 12, 2016*

**Algebra**

substitute 12=-4(5)+3 -20+3 12=-17 is not true

*February 9, 2016*

**physics**

session.masteringphysics. com/problemAsset/1187768/5/P4-80.jpg

*February 9, 2016*

**physics**

A 71.0 kg patient is suspended in a raised hospital bed as shown in the figure. The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the patient and the bed are 0.500 and 0.800, ...

*February 9, 2016*

**Science**

If an astronaut with a tool belt accidentally pushed off from the shuttle, how could the tools in the belt be used to return the astronaut to the shuttle?

*February 2, 2016*

**Math**

What's another way you can write 0.023 (fraction or percent) problem: write 0.023 two different ways

*January 27, 2016*

**english 1**

Which sentence from the passage best supports the conclusion that the author was influenced by Amaterasu?

*January 21, 2016*

**Math**

Find two consecutive odd integers such that the square of the larger is one less than twice the square of the smaller.

*January 12, 2016*

**Physics**

A force F = 119 N acts at an angle α = 31◦ with respect to the horizontal on a block of mass m = 22.5 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2 . If the static frictional coefficient is µs = 0.72, what is the force ...

*January 11, 2016*

**math**

7x-3y=41 2x=-5y Solve using augmented matrix What do i do?

*January 4, 2016*

**Math**

$10,000 invested. part at 3% and part at 6% for a period of 1 year. how much was invested in each account if the interest earned in the 6% account was $357 greater than the 3% account?

*December 20, 2015*

**Math**

Sorry I remembered it wrong. Here it is again. A candy machine contains 5 times the number of nickels in dimes and 16 less than the number of nickels in quarters. How many of each are there?

*December 15, 2015*

**Math**

A candy machine contains 5 times the number of nickels in dimes and is less than 16 the number of quarters. Total value is $12.80. How many are there nickels and dimes? I can't understand what means 5 times the number of nickels in dimes. How do you put nickels in dimes? ...

*December 15, 2015*

**Math**

90 members of a sport club plays at least one of the game tennis,football and volleyball,10 plays tennis and football,19 play football and volleyball and 29 plays tennis and volleyball.x people plays all the 3 games,while x people each play only one game how many play football...

*December 8, 2015*

**Math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

*December 7, 2015*

**College of Medicine ;University of Malawi**

what is the ph at 25 degrees Celsius of a solution made by dissolving a 5.00 grain tablet of aspirin in 0.500 litres of water? The tablet contains 0.325g of the acid HC9H7O4. ka=3.3*10^-4mm=180.2g/l

*December 3, 2015*

**Physics**

Szymon and Chris fly their balloon around the earth in 80 days. Taking the radius of the earth to be 6400 km, calculate their average speed in m/s. I did answered all the homework questions but I didn't know how to do this one?

*November 21, 2015*

**Kids kingdom school**

Perimeter= adding all outside sides. A carpet is square one is 15cm and the other is 12cm and because its square the other side will be the same since it's parallel 15+15+12+12= 30 + 24 = 54

*November 21, 2015*

**Programming**

Write a program that inputs (from the user) the number of hours worked and hourly rate for employees and outputs the total pay. The program should process an arbitrary number of employees; the user will terminate input by entering 0 hours worked and pay rate. Use a class ...

*November 1, 2015*

**Chemistry**

Calculating theoretical yield and percentage yield from preparation of 4-acetoxybenzoic acid from the interaction of 4-hydroxybenzoic acid and sulphuric acid

*October 28, 2015*

**Chemistry**

1. Explain in terms of rate laws and/or reaction quotients why the product’s low solubility favors the forward reaction over the reverse. The forward rate law is rate = k[maleic acid]n and the reverse rate law is: rate = k[fumaric acid]n. Consider how the rate laws are ...

*October 25, 2015*

**Chemistry**

What would happen to the peaks on your chromatogram for substances that do not separate?

*October 19, 2015*

**chemistry**

What would happen to the peaks on your chromatogram for substances that do not separate? How are transmittance values are affected by the amount of sample on your salt plate?

*October 19, 2015*

**Math**

How could you use the product of 108 and 4 to find the product of 324 and 4

*October 13, 2015*

**Pre-calculus**

Steve your calculations/formulas are wrong they do not work for continuous compounding sorry

*October 11, 2015*

**physics**

When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. Calculate the force she must exert if her deceleration is 5.00 times the acceleration of gravity.

*October 3, 2015*

**math**

can you solve expressions that have the same variables, but are in a different order? For example: 36jkm - 36mjk

*October 1, 2015*

**chemistry**

Recrystallization Lab What are the potential consequences of using a spatula to scrape crystals from wet filter paper during filtration?

*September 30, 2015*

**Math**

my son was asked to find each product by factoring the tens, and to draw rectangles if needed to on 6x2, 6x20, and 6x200. I'm not sure how to do this. please help me

*September 28, 2015*

**Physics-Trajectory**

Plug it in

*September 11, 2015*

**Accounting**

Department S had no work in process at the beginning of the period , 18,000 units were started during the period, 2,000 units were 30% completed at the end of the period, and the following manufacturing costs were debited to the departmental work in process account during the ...

*September 3, 2015*

**physical science**

If the park is 360 meters wide and the tram takes 6 minutes to get to the other side, how fast is it moving?

*August 26, 2015*

**Physics**

A length of copper wire is shaped into a single circular loop of circumference 63 cm, similar to that shown in the picture below. A magnetic field of strength 0.50 T is parallel to the normal of the loop. The copper wire has a resistance of 2.5 x 10-2 Ω. The ends of the ...

*August 14, 2015*

**Economics**

If switching to fast replenishment compared to holding inventory in a dc (distribution center). Is this: Operational? Tactical? or Strategic?

*August 12, 2015*

**physics**

A small truck runs off the road and over a 100metre high cliff. It lands 50 metre from the base of the cliff. How long did it take for the truck to hit the ground

*June 20, 2015*

**physics**

A stationary pool ball with mass 0.20 kg is struck with an average force of 35 N over a time of 18 ms. What speed does it have just after impact?

*May 27, 2015*

**Math**

Can you explain why they work plz i just don't understand

*May 25, 2015*

**Math**

Plz Help!!! List three different ways to write 5 (with an exponents of 11) as the product of two powers. explain why all three of you expressions are equal to 5 with an exponent of 11… so far i just know that when your dealing with multiplying a power you add. any ...

*May 25, 2015*

**physics**

Voltage= Current X Resistance(ohms law) V-the battery voltage R-resistance in a circuit V=IR P=IV P=V2/R, where 2 is an exponent P=I2R, where 2 is an exponent P=Power q=CV q=charge C=Capacitance V=voltage (ohms law for capacitors)

*May 21, 2015*

**Physics**

Kinematics Average Velocity= the change in displacement of the x value time the elapsed time(avg velocity) Vage=X/T Average Velocity=initial velocity+final velocity divided by 2(avg velocity for constants) Vavg=Vi+Vf/2 Acceleration=the change in velocity divided by the elapsed...

*May 21, 2015*

**Calculus**

If f(5) = 7, then lim f(x) ------------------x-> 5

*May 18, 2015*

**Calculus**

If f(5) = 7, then lim f(x) x-> 5

*May 18, 2015*

**Language Arts**

Does any one have the answers because igot 75% on my test but it wouldn't tell me which ones i got wrong so does any one have the 100% correct answers? thx

*May 16, 2015*

**Calculus**

f(x)=xe^-x^2. What interval is this function increasing.

*May 11, 2015*

**Pre-Algebra (Probability)**

The probability of choosing a 5 and then a 6

*May 7, 2015*

**World Geo, Help pls**

what is 3 and 6?

*April 27, 2015*