Wednesday

January 28, 2015

January 28, 2015

Total # Posts: 231

**Physics**

A(n) 0.491 kg football is thrown with a speed of 17.8 m/s. A stationary receiver catches the ball and brings it to rest in 0.0147 s. What is the magnitude of the impulse de- livered to the ball? Answer in units of kg · m/s
*January 27, 2015*

**Math**

Find the lateral area of the cone. Use 3.14 fo pi and round result to the nearest whole unit. radius: 15cm Side unit: 28cm Please help!! A) 1,319 cm squared B) 2,639 cm squared C) 707 cm squared D) 2,026 cm squared is the answer B?
*January 13, 2015*

**English**

Hi, i really need help with these questions i kept trying to think and think but i keep getting confuse. What must people know or understand about a place in order to belong there? How do they gain that knowledge or understanding? What types of experiences can tell people that...
*December 30, 2014*

**english**

this sentence has faulty parallelism and i need to correct it. "Jessa is tall, slender, and has brown hair." I think it's Jessa is tall, slender with brown hair. OR Jessa is tall and slender. She has a brown hair. What do you think? please help thank you!!
*November 27, 2014*

**english**

"How to make both ends meet." i think it's a sentence too?
*November 27, 2014*

**english**

"Why I refused." at first i think it's a fragment.. but i'm confused because it has a subject "I" and a verb "refused".. So what's the correct answer?
*November 27, 2014*

**english**

"Once you reach your destination." i think it's a fragment??
*November 27, 2014*

**english**

"Whatever is decided here." i think it's a sentence because it has a subject and a verb?
*November 27, 2014*

**english**

Down the road across the fields. i think this is a fragment?
*November 27, 2014*

**english**

can you please tell me if this is a sentence or fragment: The plan to have a class reunion. I think it's a sentence but idk because i can continue it by adding "is cancelled" in the end. How to know if it's already a sentence? of it's still a fragment? ...
*November 27, 2014*

**MATH**

The table below represents the volume of a liquid sample as a function of its temperature: Temp (C) Volume (ml) x f(x) 11 95 16 100 21 105 26 110 The average rate of change of f(x) between x=11 to x=21 is _____ ml per C ((degrees)) and represents the rate of change of volume ...
*November 16, 2014*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its ...
*November 4, 2014*

**physics **

The wheels, axle, and handles of a wheelbarrow weigh 60.0 N. The center of gravity of the wheelbarrow alone is 0.600 m from the axel. The distance from the axle to the hands of the operator is 1.3 m. The force applied by the operator to the end of the handles is 250 newtons. ...
*November 3, 2014*

**another math equation**

do i multiply 4, 5 , and 3? and 2?
*October 11, 2014*

**another math equation**

I don't know what to multiply
*October 11, 2014*

**another math equation**

PLEASE HELP!!!
*October 11, 2014*

**another math equation**

a b 2 - =- =-, find ab 4 5 3 i'm gonna need supporting onthis
*October 11, 2014*

**math equation**

PLEASE HELP! IT'S DUE IN A LITTLE WHILE!
*October 11, 2014*

**math equation**

a b - = - = 3, Find a + b 4 5
*October 11, 2014*

**Conversion again (3 question finish-up)**

Mr.Bob, Ms.Sue, can you change it to a common fraction though?
*October 10, 2014*

**Conversion again (3 question finish-up)**

Hello, Ms.Sue helped me with the last question, but I did not get it. I have 3 questions and I would like to solve it step by step to the answer. Can you help me? 1. ) .85 meters/minute = _____ kilometers/second 2.) 80 ft/s = ____ mile/hour 3.) 12 meters/hour = _____ ...
*October 10, 2014*

**math**

I'm sorry: It'S 4.25 + 4.58(3)
*October 10, 2014*

**math**

4.25 : .58(3) _______________ Try this
*October 10, 2014*

**Conversion**

I simplified the whole thing when I converted it to a fraction. I got 57/500 but it didn't work. .114 = 57/500 right? I didn't get it right though.
*October 10, 2014*

**Conversion**

10 ft/min ____ mi/hour
*October 10, 2014*

**algebra**

I was thinking the second one too, and yes I think i'll ask my teacher about it. Thanks for your help :) Can you help with this? Write two integers with different signs that have the sum of -25
*October 6, 2014*

**algebra**

i have no idea, that is what i was confused about.
*October 6, 2014*

**algebra**

evaluate the expression when a = 4 b = -5 and c = -8 -b + c =
*October 6, 2014*

**ALGEBRA**

The table below shows two equations: Equation 1 |3x - 1| + 7 = 2 Equation 2 |2x + 1| + 4 = 3 Which statement is true about the solution to the two equations? Equation 1 and equation 2 have no solutions. Equation 1 has no solution and equation 2 has solutions x = 0, 1. The ...
*October 5, 2014*

**english**

has anyone read of beetles and angels
*October 5, 2014*

**ordering decimals from least to greatest**

also -1.45... is a repeating decimal
*September 26, 2014*

**ordering decimals from least to greatest**

from the least value to the greatest value
*September 26, 2014*

**ordering decimals from least to greatest**

what is the order of these decimals from least to greatest? -1.4 -1.45 -1.45... -1.455
*September 26, 2014*

**SCIENCE**

If we decrease the distance an object moves we will decrease the amount of force applied. Decrease the amount of work done. increase the amount of force applied. increase the amount of work done.
*September 23, 2014*

**Math**

Brian gave 20% of his baseball cards to Scott and 15% to Adam. If he still had 520 cards, how many did he have originally?
*July 30, 2014*

**Math terminal zeroes**

Scratch that. Never mind.
*July 25, 2014*

**Math terminal zeroes**

If a number ends in zeroes, the zeroes are called terminal zeroes. For example, 520,000 has four terminal zeroes, but 502,000 has just 3. Let X equal the product of all natural numbers from 1 to 20. N = 1 * 2 * 3... *20. How many terminal zeroes will N have when it is written ...
*July 25, 2014*

**Physics **

A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. A) What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? B) What is the player's speed afterward if the ball ...
*May 27, 2014*

**math**

what would the graph of y=x^2+1 look like A. a straight line B. a parabola C. a dotted line D. none of the above
*May 26, 2014*

**science**

Which of the following is the most effective way to preserve biodiversity? (1 point) captive breeding habitat destruction habitat preservation habitat fragmentation
*May 15, 2014*

**math**

CD sales at corner music increased 145% last year. which number is equivalent to 145%? A. 14,500 B. 145 C. 1.45 D. O.O145 i think C but im not sure
*May 14, 2014*

**english**

if you read the giver can you please check my answers and see if they are correct? . What is the jonas apprehensive about at the beginning of the novel? A. a plane flying over the community B. a dream that he had recently C. the upcoming ceremony and his assingment I think C 2...
*May 13, 2014*

**english**

Jane Goodall, a primatologist, studies the social and family lives of chimpanzees.
*May 13, 2014*

**LA**

1. What is the jonas apprehensive about at the beginning of the novel? A. a plane flying over the community B. a dream that he had recently C. the upcoming ceremony and his assingment I think C 2. In Jonas's community, members are released from the community under which ...
*May 13, 2014*

**LA**

Can you check my answers?
*May 13, 2014*

**LA**

has anyone read the giver?
*May 13, 2014*

**history**

1 C and 2 D?
*May 12, 2014*

**history**

1. Which factor contributed most to the beginning of the women's rights movement in the United States during the mid-1800s? A. A dramatic increase in women's participation in the workforce *** B. A shift in social attitudes brought on by increased sectional tensions C...
*May 12, 2014*

**science**

the current atomic model would be revised if A. better microscopes were being used to study its structure. B.better microscopes are invented in the future. C. new information about an atom's structure is discovered. D. a new element is discovered in the future
*May 8, 2014*

**math**

simplify 10p4 A. 210 B. 360 C. 5,040 D. 151,200 simplify 9c4 A. 126 B. 15,120 C. 5 D. 3,024
*May 7, 2014*

**math**

a basket contains the following pieces of fruit: 3 apples, 2 oranges, 2 bananas, 2 pears, and 5 peaches. Jameson picks a fruit at random and does not replace it. Then Brittany pricks a fruit at random. What is the probability that Jameson gets a banana and Brittany gets a pear...
*May 7, 2014*

**math**

each of two urns contains green balls and red balls. urn I contains 8 green balls and 12 red balls. Urn II contains 5 green balls and 8 red balls. if a ball is drawn from each urn, what is P(red and red)? A. 79/65 B. 24/65 C. 20/33 D. 2/13
*May 7, 2014*

**math**

i meant red
*May 7, 2014*

**math**

a bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. you choose a marble, replace it, and choose again. what is P(read, then blue)? A. 77/164 B. 19/41 C. 90/1681 D. 45/41
*May 7, 2014*

**math**

Food Express is running a special promotion in which customers can win a free gallon of milk with their food purchase if there is a star on their receipt. So far, 129 of the first 138 customers have not received a star on their receipts. What is the experimental probability of...
*May 7, 2014*

**math**

thank you!!
*May 7, 2014*

**math**

a number cube is rolled 150 times. the number 3 comes up 43 times. hat is the experimental probability of rolling a 3? what is the theoretical probability of rolling a 3? A. 43/150 ; 1/6 B. 43/150 ; 1/50 C. 1/6 ; 43/150 D. 3/43 ; 1/6
*May 7, 2014*

**chemistry**

The generic metal A forms an insoluble salt ABsolid and a complex AC5aqueous. The equilibrium concentrations in a solution of AC5 were found to be A is 0.100 M, C is 0.0320 M, and AC5 is 0.100 M. Determine the formation constant Kf of AC5
*May 7, 2014*

**chemistry**

The solubility of AB(s) in a 1.000-M solution of C(aq) is found to be 0.121 M. What is the Ksp of AB?
*May 7, 2014*

**Algebra 1 math**

Deborah rolls two fair dice. What is the probability that the sum of the numbers rolled is 7?
*April 29, 2014*

**urgent (physics)**

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.
*April 24, 2014*

**math**

Thank you so much
*April 14, 2014*

**math**

The sales goal for your store this week is $22,682. The sales goal for your store this week last year was $20,128. Your store has averaged 1775 transactions per week for the last four weeks. Assuming the number of transactions is consistent, what is the average basket size (...
*April 14, 2014*

**Physics**

A baby whale gets lost from his mother while swimming through a large underwater canyon. Frantically the baby whale yells for his mommy. 1.5 seconds later, the whale hears his yell's ECHO from the canyon wall. How far is it to the canyon wall? The speed of sound in water ...
*April 3, 2014*

**I need help (Physics)**

A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?
*March 14, 2014*

**Math**

For what value of a, would the system have an infinite number of solutions? 2x-y=5 8x-47=2a A) 2 B) 4 C)5 D)10 E)20
*March 14, 2014*

**geometry**

THANK STEVE i HAVE THE ASNWER
*March 1, 2014*

**geometry**

IT DOESNT SAY STEVE
*March 1, 2014*

**geometry**

If A point K is the reflection of L (2,5) IN THE Y AXIS WHAT IS THE LENGTH OF KL
*March 1, 2014*

**bus-math**

Oakwood Plowing company purchased two new plows. In 170 days they must make a payment of $24,330.00 to pay for them. As of today they have $23,600 what rate of interest will be needed.
*February 23, 2014*

**science help asap!!!**

thank you do much!!
*January 16, 2014*

**Physics**

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?
*November 20, 2013*

**Physics**

A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.6x10-3 kg bullet with a speed of 670 m/s. What is the Kelvin temperature of the gas?
*November 20, 2013*

**biology**

Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?
*October 28, 2013*

**MATH**

(a) Transform the expression (x − a)^2 + y^2 = a^2 into polar coordinates. (b) Sketch the region R bounded by the curve given in part (a). (c) Use a double integral in polar coordinates to ﬁnd the area of the region R.
*October 26, 2013*

**physics**

The drawing shows a 25.1-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, 1 and 2, are applied to the crate, and it begins to move. The coefficient of kinetic friction between the crate and the floor is μk = 0...
*October 1, 2013*

**algebra**

15. To travel a fixed distance, the number of gallons needed is inversely proportional to the miles per gallon rating P of the car that gets 42 miles per gallon (mpg) needs 33 gallons to travel the distance. a. Find an equation of variation N= b. A car that gets 77 mpg needs ...
*September 27, 2013*

**algebra**

((5w^2-16w+3)/(5w^2+24w-5))/((15w^2-8w+1)/(3w^2+14w-5))
*September 27, 2013*

**physics**

Two cars, A and B, are traveling in the same direction, although car A is 204 m behind car B. The speed of A is 22.9 m/s, and the speed of B is 18.6 m/s. How much time does it take for A to catch B?
*September 22, 2013*

**Physics**

A rifle that has been "sighted in" for a 94.6-meter target. If the muzzle speed of the bullet is v0 = 429 m/s, what are the two possible angles è1 and è2 between the rifle barrel and the horizontal such that the bullet will hit the target? One of these ...
*September 22, 2013*

**maths**

thank you
*September 15, 2013*

**maths**

A truck rolls down a hill subject to acceleration due to gravity and resistance (including air resistance, rolling friction, etc) and the distance si (metres) travelled after ti seconds is observed. Classical mechanics predicts that the distance travelled by the truck should ...
*September 15, 2013*

**math**

For every prime p consider all polynomials f(x) with integer coefficients from 1 to p and degree at most p−1, such that for all integers x the number f(2x)−f(x) is divisible by p. Find the sum of all primes p<1000 such that the number of such polynomials is ...
*June 23, 2013*

**MATH hard problem...HELLPPPPPP**

Let S={1,2,3,…11} and T1,T2…,TN be distinct subsets of S such that |Ti∩Tj|≤2 for all values i≠j. What is the maximum possible value of N? clue: The empty set is a subset of every set. Thanks
*May 21, 2013*

**MATH Help please.....**

Let S={1,2,3,…11} and T1,T2…,TN be distinct subsets of S such that |Ti∩Tj|≤2 for all values i≠j. What is the maximum possible value of N? (The empty set is a subset of every set.)
*May 21, 2013*

**Physics**

i input your formula and false
*May 21, 2013*

**Physics..Elena or anybody please help**

0.881
*May 20, 2013*

**Physics..Elena or anybody please help**

I(mass=80 kg) sit down in the center of a trampoline and the surface sinks down by a distance of 10 cm when I reach equilibrium. How far above the ground in m must the trampoline be placed so that if I jump onto the trampoline from a height of 3 m above the surface of the ...
*May 20, 2013*

**Math**

Thank you Steve.
*May 8, 2013*

**Math**

Having a problem writing an expanded number in notation in descending order. Ex. 92,563,174. I know the placements and the number but have a problem when it comes to write it. Can you please help. I would appreciate an example so much.
*May 8, 2013*

**Elements of Calculus**

I cant seem to figure this one out, please help. A company is manufacturing kayaks and can sell all that it manufactures. The revenue (in dollars) is given by R=750-(X^2/30) where the production output in 1 day is x kayaks. If production is increasing at 3 kayaks per day when ...
*May 3, 2013*

**Phyics**

In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that ...
*April 12, 2013*

**Statistics**

Given a study of 9804 overweight or obese subjects with preexisting cardiovascular disease and/or type 2 diabetes. Subjects randomly assigned to subitramine (4906 subjects) or a placebo (4898 subjects) in a double-blind fashion. Primary outcome was observed in 561 subjects in ...
*April 9, 2013*

**math **

x+2/3x-6*x^2-3+2/x^2-x-6
*March 4, 2013*

**math**

75% of teenagers own cell phones and ofthose who own cell phones, 87% use text messaging. 1. What % of teens own cell phones AND text? 2. Among those who own cell phones and text, 15% send more than 200 texts a day, or more than 6,000 texts a month. What % of all teens own a ...
*February 21, 2013*

**physics**

A ray of light is incident at an angle of 20degrees to the normal on one face of an equilateral prism made in glass of refractive index 1.523. Find the total deviation produced.
*November 1, 2012*

**Chemistry**

Why did you need to know the density of the bleach solution? Why didn't you measure the density of h2o2 solution as well? Stoichiometry lab problem
*October 28, 2012*

**Physics**

To move a large crate across a rough floor, you push on it with a force F at an angle of 21° below the horizontal, as shown in the figure. Find the force necessary to start the crate moving, given that the mass of the crate is m = 29 kg and the coefficient of static ...
*October 27, 2012*

**Physics**

Thank you very much Elena for that and also for promptly answering my question on a timely manner!!!
*October 25, 2012*

**Physics**

You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force of 114 N, the sled has an acceleration of 2.3 m/s2 If the sled has a mass of 7.6 kg, what is the mass of your little sister? I don't need the ...
*October 25, 2012*