Tuesday
July 29, 2014

Posts by Joe


Total # Posts: 2,050

Physics
Two carts, one twice as heavy as the other, are at rest on a horizontal frictionless track. A person pushes each cart with the same force for 6.00 s. If the kinetic energy of the lighter cart after the push is K, the kinetic energy of the heavier cart is A. 1/4 K B. 1/2 K C. K...

chemistry
calculate the mass of water produced when 3 g HCL reacts with excess sodium carbonate

trig
y=sin pie divied by 2 theta

chemistry
A pair of students performs an experiment in which they collect 27 g CaO from the decomposition of 41 g CaCO3. Are these results reasonable? Explain your answer using percentage yield.

Government
Do you think that governors should have significant powers? I know there are about 14 states, Texas being one that their governor has very little power. But why should these governors be allowed more?

math
I have $6400 to invest at 8% and 6%. What amount is to be invested at 8% in order to earn double the interest of 6%

Math
Fred says "To find 6x8,I can use the facts for 5x4 and 1x4." Do you agree? Explain.

math
What multiplication fact can be found by using the arrays for 2x9 and 5x9?

math
it is $385 and they each had $165 left

math
plain and simple it is $385 they each had $165 left over

science
I need help doing examples for newton's 3 laws of motion....can you help me?

math
Explain how you can break apart 3x9 to help you multiply.

math
Explain how you can break apart 3times 9 to help you multiply.

reading
List 10 words that end in -ship and mean 1.quality of or state of, 2.or rank of

reading
What is the use of telomerase?

math
thanks alot

math
help me

math
-4-(4)=

maths
there are 8 doors behind each door is a number each number is less than 20 no 2 numbers are the same they add up to 93 what are the numbers

math
Is 8.5 greater then , less then or equal to -1000? 8.5__-1000 (<,>,=) PLEASE HELP ME

math
11520

math
Stacy multiplied 5x9 and said the answer was 44. What two patterns could you use to show that the answer is not correct?

Math
Is 30 a multiple of 5? How do you know?

Math
Shawna thinks that 8x2=17. What number pattern shows that she is not correct?

math
Jay is 150 cm tall. He can reach 55 cm above his head. A ball is thrown 268 cm in the air. How many centimeters must Jay jump to cathch it?

Math
if you ride your bike 23 kilometers in 1.5 hours,wht is your average speed?

com170
Write five sentences about the role of education in successful financial planning in the spaces on the following page. Correctly use a different verb tense in each sentence. Highlight each verb in yellow and identify the tense in parentheses.

Math
Which fraction is equal to 1/5? A.2/10 B.3/10 C.1/15 D.2/15 Can you show me the steps?

Physics help on the TI-84 calculator
(3*2nd+8)/(5.4*2nd+14)

math
can you explain how you got the answer?

math
can you explain how you got the answer?

math
a farmer wants to build a rectangular pen using a side of a barn and 60ft of fence. find the dimensions and area of the largest such pen

Math
A change purse contains an equal number of pennies, nickels, and dimes. The total value of the coins is 112 cents. How many coins of each type does the purse contain?

science
a)why do chemist prefer to read/ record the absorbance, rather that the percent transmittance, of light when analyzing a sample having a visible color? b) three parameters affect the absorbance of a sample. Which one is the focus of this experiment?

Physics
A 100-Watt light bulb plugged into a 120-Volt outlet is left on for 60 seconds. How much energy (in Joules) is used up by the bulb during this time?

Math
4(2x+1)-29=3(2x-5) I need help

math
Chloe used 30 toothpicks as edges to make a model for a prism. How many sides did the base of her prism have? How many vertices?

math
peer has $4.20 in dimes and quarters. He has 21 coins. How many coins of each kind does he have?

math
4TIMES9OVER30-KOVER16

Algebra
I think I figured it out. x=3 y=5 z=-1

Algebra
Solve the system: 3x-y+z=3 -x+y+2z=0 -5x+3y+2z=-2 x= y= z=

Physics
0.490 mol of argon gas is admitted to an evacuated 50.0 cm^3 container at 60.0 C. The gas then undergoes an isochoric heating to a temperature of 400 C. What is the pressure?

math
how do you find out the perimeter and the area of a parollelogram in a short cu way in a centimeter grid paper?

physics
A light bulb is wired in series with a 133-Ω resistor, and they are connected across a 120-V source. The power delivered to the light bulb is 22.5 W. What are the two possible resistances of the light bulb?

math- check me
Find the slope of the line graphed below. Points are (-4,-1) and (4,3) Is the slope 4/8 ?

Math
It was P(x)=2x^3-5x^2-9 I got 0 and x-3 is a factor

Math
Use the Factor Theorem to determine whether x-3 is a factor of P(x)=2x^3-5x^-9 . Specifically, evaluate P at the proper value, and then determine whether x-3 is a factor. P(_)=__ also pick which one applies x-3 is not a factor of P(x) x-3 is a factor of P(x)

Math
Simplify. Please help me fractions hate me:) (1/25-1/x^2)divided by (1/5+1/x)

physical science
What is the mass of a 10.0 cm3 cube of copper?

physical science
How many hours are required for a radio signal from a space probe near the dwarf planet Pluto, 6.00 x 10 (to the 9th) km away, to reach Earth? Assume that the radio signal travels at the speed of light, 3.00 10 (to the 8th) m/s.

physics
The car's displacement 0.7 s after leaving the dock has a magnitude of 14.0 m. What is the car's speed at the instant it drives off the edge of the dock?

physics
HELP!You are handed a 8.0 cm stack of new one-dollar bills. Assume the thickness of a dollar bill is 1.4 times thicker than your textbook paper (textbook paper = 63 um). (that's "micrometers") How many dollars are in your stack?

physics
Imagine for a moment that treble sounds could travel at 400 m/s, but bass sounds at only 200 m/s. If sound behaved that way, and you were listening to the CU band in Folsom stadium from a distance of 110 m, how much delay would you hear between the trumpet and tuba notes when ...

physiscs
A spherical balloon has an area of 7.1076 m2.How to you calculate the volume?

physics
Is the equation 344+0.6x(t-20)? I'm not getting this at all? How long does it take for sound to arrive at the back of a big auditorium if the temperature is 33 oC and the stage is 29 m away? answer in seconds

Medical & Billing
Can any one let me know how long it will take to complete Medical & billing certificate i am doing from Penn Foster and i am doing 4th assignement & 4 moths are over,it really sucks with projects kindly help me with ur comments what should i do continue or quit ?

physics
there's a typo. it should be R+h not R=h. my bad.

physics
What is the speed of a communications satellite orbiting the Moon at an altitude of 290 km above the Moon’s surface? I know that G=6.67e-11 and h=290. I plugged inthese values, 7.35e24 for the mass and 1.738e6 for the radius into v=sqrtGM/R=h but I didn't get the righ...

science
36

Business
Would it be better to pay off a $1000 loan at 4% over 15 years or at 10% over five years ?

physics
A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 4.00m north, 2.00m northeast, and 1.00m at 30.0 degrees west of south starting at the same initial point, an golfer could make the hole in what single displacement?

math
whch division sentence will give an answer that is not in equal groups? 26/4 35/7 42/6 or 45/5

economics
You have the following data. A monopolist produces 1000 units of output per month, and sells it at the price of 10 each. You know that the monopolist does not do any price discrimination, and you also know that the price-cost margin of this firm (P-MC)/P is evaluated at 0.2. E...

geometry
if the measure of angle A = 70 degrees & the measure of angle B = 25 degrees, find the measure for angle C in the traingle of ABC

math
18

math
15

Physics
Tarzan (m = 75 kg) tries to cross a river by swinging from a 15.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. What is the total force Tarzan exerts on the vine at that point?

Physics
Fnet = ma 6.5 = 3.3a 6.5/3.3 = a 1.97 = a

4th math
Sammy ate 3/8 of a pizza, and Betty ate 1/8 of the same pizza. What fraction of the pizza did Sammy and Betty eat?

chemistry
Is a gaseous mixture able to contain isolated atoms and molecules, and if so, do the mixtures have to contain them?

unscramble spanish words
rvoidate

calculus
integrate: (square root of (6x+4)) - (2x) dx

math
if a rectnagular prism has a height of h, the, width of the prism is six less than h and the length of the prism is one fourth of the length, find an equation for the volume of the rectangular prism in therms of h

statistics probablity
Each time that Ed Charges an expense to his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the actual amount?

math
9+n=-2 solve

math
5= D+8 Solve

7th Grade Math
I Think it is 21 Because: 2 doubled is 4 4 + 5 is 9 a quarter of 9 is 3 3+9 is 12 12 plus two is 14 and 1/2 of 14 is 7 7 + 14 is 21. so 21 is the answer

maths
e^2*(ab)=d

Calculus II
Suppose that y = f (t) satisfies the differential equation dy/dt=y(2−y) and initial condition f (0) = 1. Find an explicit expression for f (t).

chemistry
The solubility of nickel (II) carbonate at 25 degrees C is 0.047 g/L. Calculate Ksp for nickel (II) carbonate.

CMC/260
I am writing a paper and need some help getting started. I was asked to, Compare in 750 to 1,050 words the relationship of status and age to gender in the U.S. with the relationship of status and age to gender in another country. I am confused about how to begin this paper.

CMC/260
Compare in 750 to 1,050 words the relationship of status and age to gender in the U.S. with the relationship of status and age to gender in another country.

com
When determining whether an online source is credible, it is important to use trusted news agencies, governmental websites, or educational, websites for information. Additionally, most credible websites have an "about us" section in which one can find information reg...

math
b/4 >-5 solve inequality

algebra
-56+y>113 solve the inequality

algebra 1
Solve the equation 7z+30=-5

physics
yes i made a mistake its 3.38 x 10-4 m3

physics
A full can of black cherry soda has a mass of 0.406 kg. It contains 3.38 m3 of liquid. Assuming that the soda has the same density as water, find the volume of aluminum used to make the can.

Science
What is a 3 dimensional ecosystem? What is a 2 dimensional ecosystem?

Physics
#1.) A solar photovoltaic panel has an area of 3 m^2. The panel's maximum power output is 595 W @ 1100 W/m^2. a) What is its efficiency? b) If the panel receives 1300 W/m^2 of irradiance, what is its new power output? #2.) A solar voltaic module has a maximum output of 200...

physics
A 2.2 kg purse is dropped from 55 m above before reaching the ground with a velocity of 25 m/s. What was the average air resistance.

physics
harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in different?

social studies
The goal of America's containment policy was to

8 th grade math
2a+ab=c solve for a

statistics
a.

Math
If -T = 5, what is T ?

english
True

science
if 8 g of vinegar is added to baking soda to form 24 g of c02 and other products, how much baking soda did you need?

Chemistry
The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. Calculate its Ksp i calculated it and got 1.5 x 10 ^-2 but the program said that it was wrong if you could help explain how to do it i would appreciate it

Chemistry
The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. Calculate its Ksp i calculated it and got 1.5 x 10 ^-2 but the program said that it was wrong if you could help explain how to do it i would appreciate it

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