Thursday

January 19, 2017
Total # Posts: 2,579

**math**

during a special promotion, each customer who makes a purchase is given a coupon for a discount of either 10,20, 30,40, or 50 percent. if a customer has an equal chance of receiving any one of the 5 types of discount coupons,what is the probability that the first customer will...

*March 6, 2011*

**Physics**

A spiral spring is compressed so as to add U units of potential energy to it. When this spring is instead stretched two-thirds of the distance it was compressed, its remaining potential energy in the same units will be a. 2U/3 b. 4U/9 c. U/3 d. U/9

*March 5, 2011*

**Physics**

Two lumps of clay having equal masses and speeds, but traveling in opposite directions, collide and stick together. Which of the following statements about this system of lumps must be true? A. The momentum of the system is conserved during the collision. B. The kinetic energy...

*March 5, 2011*

**Physics**

A glider airplane is coasting horizontally when a very heavy object suddenly falls out of it. As a result of dropping this object, the glider's speed will a. increase. b. decrease. c. remain the same as it was.

*March 5, 2011*

**Physics**

Cart A, of mass 3.00 kg, approaches and collides with cart B, which has a mass of 7.00 kg and is initially at rest. When the springs have reached their maximum compression, a. cart A has come to rest relative to the ground. b. both carts have the same velocity. c. both carts ...

*March 5, 2011*

**Physics**

A proton with a speed of 4.20×104 km/s makes an elastic head-on collision with a stationary carbon nucleus. We can look up the masses of both particles. Which of the following quantities can be calculated from only the known information? A. The velocity of the proton and...

*March 5, 2011*

**Physics**

You drop an egg from rest with no air resistance. As it falls, a. only its momentum is conserved. b. only its kinetic energy is conserved. c. both its momentum and its mechanical energy are conserved. d. its mechanical energy is conserved, but its momentum is not conserved

*March 5, 2011*

**Physics**

A heavy rifle initially at rest fires a light bullet. Which of the following statements about these objects is true? A. The bullet and rifle both gain the same magnitude of momentum. B. The bullet and rifle are both acted upon by the same average force during the firing. C. ...

*March 5, 2011*

**Physics**

Which of the following statements is true for an elastic collision? A. Both momentum and kinetic energy are conserved. B. Momentum is conserved, but kinetic energy is not conserved. C. Kinetic energy is conserved, but momentum is not conserved. D. The amount of momentum lost ...

*March 5, 2011*

**physics**

Which of the following statements is true for an inelastic collision? A. Both momentum and kinetic energy are conserved. B. Momentum is conserved, but kinetic energy is not conserved. C. Kinetic energy is conserved, but momentum is not conserved. D. The amount of momentum lost...

*March 5, 2011*

**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 4.00 s. If the magnitude of the momentum of the lighter cart after the push is P, the magnitude of the momentum of the heavier cart is ...

*March 5, 2011*

**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...

*March 5, 2011*

**chemistry**

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

*March 3, 2011*

**trig**

y=sin pie divied by 2 theta

*March 2, 2011*

**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.

*March 1, 2011*

**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?

*February 26, 2011*

**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%

*February 24, 2011*

**Math**

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

*February 24, 2011*

**math**

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

*February 24, 2011*

**math**

it is $385 and they each had $165 left

*February 24, 2011*

**math**

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

*February 24, 2011*

**science**

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

*February 23, 2011*

**math**

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

*February 22, 2011*

**math**

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

*February 22, 2011*

**reading**

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

*February 19, 2011*

**algebra**

10 2002, 2112, 2222,2332,2442,2552,2662,2772,2882,2992

*February 19, 2011*

**reading**

What is the use of telomerase?

*February 19, 2011*

**math**

thanks alot

*February 16, 2011*

**math**

help me

*February 16, 2011*

**math**

-4-(4)=

*February 16, 2011*

**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

*February 16, 2011*

**math**

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

*February 15, 2011*

**math**

11520

*February 14, 2011*

**math**

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

*February 13, 2011*

**Math**

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

*February 13, 2011*

**Math**

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

*February 13, 2011*

**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?

*February 13, 2011*

**Math**

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

*February 10, 2011*

**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.

*February 10, 2011*

**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?

*February 9, 2011*

**Physics help on the TI-84 calculator**

(3*2nd+8)/(5.4*2nd+14)

*February 8, 2011*

**math**

can you explain how you got the answer?

*February 2, 2011*

**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

*February 2, 2011*

**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?

*February 1, 2011*

**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?

*January 31, 2011*

**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?

*January 30, 2011*

**Math**

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

*January 30, 2011*

**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?

*January 30, 2011*

**math**

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

*January 30, 2011*

**math**

4TIMES9OVER30-KOVER16

*January 30, 2011*

**Algebra**

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

*January 27, 2011*

**Algebra**

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

*January 27, 2011*

**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?

*January 26, 2011*

**math**

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

*January 26, 2011*

**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?

*January 25, 2011*

**math- check me**

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

*January 24, 2011*

**Math**

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

*January 24, 2011*

**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)

*January 24, 2011*

**Math**

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

*January 24, 2011*

**physical science**

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

*January 22, 2011*

**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.

*January 22, 2011*

**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?

*January 21, 2011*

**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?

*January 20, 2011*

**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 ...

*January 20, 2011*

**physiscs**

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

*January 20, 2011*

**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

*January 20, 2011*

**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 ?

*January 19, 2011*

**physics**

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

*January 19, 2011*

**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 ...

*January 19, 2011*

**Business**

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

*January 17, 2011*

**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?

*January 17, 2011*

**math**

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

*January 13, 2011*

**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. ...

*January 13, 2011*

**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

*January 12, 2011*

**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?

*January 10, 2011*

**Physics**

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

*January 10, 2011*

**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?

*January 3, 2011*

**chemistry**

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

*January 2, 2011*

**unscramble spanish words**

rvoidate

*January 2, 2011*

**calculus**

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

*December 27, 2010*

**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

*December 22, 2010*

**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?

*December 16, 2010*

**math**

9+n=-2 solve

*December 14, 2010*

**math**

5= D+8 Solve

*December 14, 2010*

**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

*December 14, 2010*

**maths**

e^2*(ab)=d

*December 13, 2010*

**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).

*December 13, 2010*

**chemistry**

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

*December 13, 2010*

**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.

*December 10, 2010*

**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.

*December 10, 2010*

**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 ...

*December 9, 2010*

**math**

b/4 >-5 solve inequality

*December 8, 2010*

**algebra**

-56+y>113 solve the inequality

*December 8, 2010*

**algebra 1**

Solve the equation 7z+30=-5

*December 8, 2010*

**physics**

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

*December 6, 2010*

**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.

*December 6, 2010*