Wednesday

February 22, 2017
Total # Posts: 101

**Math**

*.9%, sorry

*February 21, 2017*

**Math**

it says .9, I got .324 but it said it was wrong

*February 21, 2017*

**Math**

36 is .9% of what number?

*February 21, 2017*

**Science**

well, lets think. a star is also a what...

*February 21, 2017*

**Math**

Thanks, I didn't know how to set it up

*January 24, 2017*

**Math**

There are 144 people in an audience. The ratio of adults to children is 5 to 3. How many are adults? PLEASE HELP!

*January 24, 2017*

**Chemistry**

Sarin is a nerve gas with a chemical formula of C4H10FO2P. What is the mass of one molecule of sarin?

*January 22, 2017*

**6TH GRADE MATH**

Write an equation that includes division that relates the number of minutes a sperm whale can stay under water.🤔

*March 10, 2016*

**physics**

A(n) 0.251 kg soccer ball approaches a player horizontally with a speed of 15.8 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 27.3 m/s. What is the magnitude of the impulse delivered to the ball by the ...

*February 16, 2016*

**physics**

A(n) 23000 kg freight car is rolling along a track at 2.8 m/s. Calculate the time needed for a force of 1960 N to stop the car. Answer in units of s.

*February 16, 2016*

**physics**

Two students on roller skates stand face-toface, then push each other away. One student has a mass of 95 kg and the second student 60 kg. Find the ratio of the magnitude of the first student’s velocity to the magnitude of the second student’s velocity.

*February 16, 2016*

**physics**

why , regardless of the magnitude of the initial velocity, the maximum horizontal displacement for a projectile occurs when the angle is 45 degrees. Specifically, what happens when the angle is increased or decreased. How would you mention vector components and also ...

*February 2, 2016*

**5th grade math**

3/8 orange 8 green 12 orange 12 red

*November 18, 2015*

**Physics**

A block of mass 4 kg, which has an initial speed of 2 m/s at time t = 0, slides on a horizontal surface. Find the magnitude of the work that must be done on the block to bring it to rest. Answer in units of J. If a constant friction force of magnitude 5 Newtons is exerted on ...

*November 18, 2015*

**Physics**

A 4.17 g bullet moving at 506.1 m/s penetrates a tree trunk to a depth of 4.64 cm. a) Use work and energy considerations to find the magnitude of the force that stops the bullet. Answer in units of N. b) Assuming that the frictional force is constant, determine how much time ...

*November 18, 2015*

**Physics**

The efficiency of a pulley system is 47 percent. The pulleys are used to raise a mass of 47 kg to a height of 7.0 m. The acceleration of gravity is 9.81 m/s 2 . What force is exerted on the rope of the pulley system if the rope is pulled for 28 m in order to raise the mass to ...

*November 18, 2015*

**physics**

A 20 g bullet is accelerated in a rifle barrel 45 cm long to a speed of 354 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.

*November 18, 2015*

**Physics**

A 7159 N piano is to be pushed up a(n) 2.26 m frictionless plank that makes an angle of 25.6 ◦ with the horizontal. Calculate the work done in sliding the piano up the plank at a slow constant rate. Answer in units of J.

*November 18, 2015*

**Math**

For the depth of water on Friday, 16 January 1998, the periodic function is: y = 1.05 sin 2pix/11.72 + 1.55 1.05 is the 'a' value 2pi/11.72 is the 'b' value 1.55 is the 'd' value we were told not to take into consideration the 'c' value in our ...

*June 2, 2015*

**Physics**

We have to work out the accepted value of a roller coaster cart (taking into account friction) when the mass is modified Here is the answer I got for 56.71 grams: 0=∆EGP+∆EK+Fd 0=mg(hf-hi )+1/2 m(v^2-u^2 )+Fd 0=0.05671 × 9.8 (0.075-0.786)+1/2× 0.05671 (...

*June 2, 2015*

**Chemistry**

What would have happened if Rutherford shot negative particles instead of positive particles in his gold-foil experiment? What would have happened if the nucleus in the gold-foil was actually negative, rather than positive, in his experiment?

*June 1, 2015*

**History**

Why was Ireland experiencing poverty in the late 1700's and early 1800's?

*May 30, 2015*

**Maths**

From looking at a periodic function, we had to decide on the equation for it. I got: y = 1.05 sin x2pi/11.72 + 1.55 1.05 is the 'a' value of the equation 2pi/11.72 is the 'b' value for the equation 1.55 is the 'd' value of the equation we were told not ...

*May 29, 2015*

**History**

Why was Ireland experiencing poverty in the 1800's?

*May 29, 2015*

**Maths**

does that mean it'll be above 1.7m from 6:16pm to 11:35pm as well?

*May 28, 2015*

**Maths**

I understand how you got 0.1433 and 2.9982 from using the CAST diagram, I'm just wondering why you need to do that? And I'm not sure how you converted 0.2673 and 5.5926 into hours and minutes

*May 28, 2015*

**Maths**

From looking at a periodic function, we had to decide on the equation for it. I got: y = 1.05 sin x2pi/11.72 + 1.55 1.05 is the 'a' value of the equation 2pi/11.72 is the 'b' value for the equation 1.55 is the 'd' value of the equation we were told not ...

*May 28, 2015*

**math**

Find the periodic payment R required to amortize a loan of P dollars over t years with interest charged at the rate of r%/year compounded m times a year. (Round your answer to the nearest cent.) P = 30,000, r = 5, t = 20, m = 4

*April 27, 2015*

**statistics**

A credit card company estimates that the average credit card balance of Americans is $3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate for addressing this question? One sample z-test ...

*March 14, 2015*

**Social Studies**

Can someone help me? I need it ASAP

*March 3, 2015*

**Social Studies**

1. What dynasty ruled the Korean peninsula from AD 668 to AD 935? Meiji Qin Silla*** Tokugawa 2. What type of government ruled North korea after World War II communist**** democratic dictatorship oligarchy 3.Both Japan and the Koreas been influenced by ________ the Tokugawa a ...

*March 3, 2015*

**Physics**

A plane is flying 250 m/s west with a crosswind of 25 m/s north affecting the flight. What is the magnitude and direction of the plane?

*February 23, 2015*

**Exponents**

Hi just curious when evalutating 5^-2 Would the answer be 25 Or would it be 0.4 = 2/5 I am lost

*November 2, 2014*

**math 4th grade**

372

*September 18, 2014*

**Algebra**

If 4 notebooks weigh 2.8 pounds how do 6 notebooks weigh

*September 2, 2014*

**Math**

A ferris wheel has a diameter of 10 m and takes 24 sec to make one revolution. The lowest point on the wheel is 1 m above the ground. (4 marks) a. Sketch a graph to show how a rider's height above the ground varies with time as the ferris wheel makes a rotation. Assume the...

*July 23, 2014*

**Math and Music**

I have to do a presentation on how math and music relate. I have found some things and facts but everything is so complicated. If someone could help explain to me how I can narrow my topic down and make a presentation that is simple but effective. It can be anything within the...

*March 21, 2014*

**Math palette of problems**

If 2/9 gallon of water fills a bucket 3/5 full, how many gallons of water are needed to fill the bucket?

*January 30, 2014*

**Physics**

A block is sliding along a frictionless surface at a speed of 3.6 m/s. It hits a spring of spring stiffness constant k = 150 N/m. How far has the spring compressed when the block comes to a stop?

*September 13, 2013*

**Physics**

Paige and Julia are playing volleyball. Paige is in spiking position when Julia gives her the perfect set. The 0.226-kg volleyball is 2.29 m above the ground and has a speed of 1.06 m/s. Paige spikes the ball, doing 9.89 J of work on it. Determine a) the total mechanical ...

*September 13, 2013*

**Chemistry**

Six sig figs.

*September 13, 2013*

**geometry**

36 units

*June 11, 2013*

**math**

least to greatest 1/8,1/10,1/7

*April 28, 2013*

**circle geometry**

The correct answer is 301. Steve, in the first line is 129, not 29... and you shouldn't work with decimals because in the end the ugly dominator simplifies with the numerator.

*March 8, 2013*

**Biology! pleaseee helppp**

please help

*November 10, 2012*

**Biology! pleaseee helppp**

About 70% of the human population can taste the bitter chemical phenylthiocarbamide (PTC), which is found in foods like broccoli. The allele, T, for tasting PTC is dominant over the allele, t, for not tasting it. Calculate the allele frequencies using the Hardy-Weinberg ...

*November 10, 2012*

**Physics**

A 59-kg housepainter stands on a 16-kg aluminum platform. The platform is attached to a rope that passes through an overhead pulley, which allows the painter to raise herself and the platform. (Ignore the mass of the pulley and any friction in the pulley.) (a) With what force ...

*October 4, 2012*

**Physics**

A box of mass m2 = 3.1 kg rests on a frictionless horizontal shelf and is attached by strings to boxes of masses m1 = 1.6 kg and m3 = 2.6 kg as shown below. Both pulleys are frictionless and massless. The system is released from rest. After it is released, find the tension in ...

*October 3, 2012*

**Biology**

Which of the following statements correctly compares the functions of a plant's roots and stem? The stem contains a high percentage of cells that provide structural support, unlike the roots. The stem is the first part of the plant to emerge from a seed, followed by the ...

*September 28, 2012*

**math**

i don't get it...

*August 21, 2012*

**Government**

Marbury v Madison

*July 21, 2012*

**Government**

This case came about because President Marbury refused to honor the last-minute judicial appointments of Pres. Madison. A) True B) False 2. Marbury wanted the courts to issue of writ of mandamus, a court order forcing Jefferson to give him his commission. A) True B) False 3. ...

*July 21, 2012*

**government**

Which of the following is NO LONGER necessary for the right to vote?A) RegistrationB) CitizenshipC) Residency D) Land Ownership

*July 5, 2012*

**Spanish**

Fill in the blanks with words from the box. estés molesta plástico recicle sea Es posible que reciclar (1) una de las mejores formas de proteger el medio ambiente. Quizás no te das cuenta (you're not aware), pero reciclar vidrio, aluminio y (2) ahorra...

*July 3, 2012*

**Spanish**

Fill in the blanks with the subjunctive form of the verbs. 1. Me alegro de que el ecoturismo (ser) un buen negocio (business). 2. Es una lástima que tú no (reciclar) el vidrio. 3. No crees que ellos (querer) usar energía solar. 4.Ojalá todos ...

*July 3, 2012*

**Biology**

The Kingdom Monera has been separated into two domains, the Archaea and the Bacteria. Which of the following was most important in prompting scientists to change the way these organisms were classified? a.)Major differences were discovered in the structure and operation of the...

*May 27, 2012*

**communication**

I need to complete an outline and thesis statement on "Two female Chihuahuas living in the same household.I don't understand how and what information to write.

*March 1, 2012*

**science**

Two mineral samples have the same mass. Wich of the following statements is therefor true

*January 17, 2012*

**Math Riddle-Algebra With Pizzaz**

Page 157 how do you graph them

*January 11, 2012*

**Math**

How does ruling out possible answers help you find the correct answer

*October 30, 2011*

**Math**

Simplify the Ratio 4in : 1 yd

*August 24, 2011*

**Spanish**

Please unscramble these Spanish words mincara, carbaa, tauerdis, tagsur, suar, qarilaul, caars, sotrecnat, piormcatr, bajra, gelral.

*June 1, 2011*

**science**

The enzyme that opens up the DNA double helix during replication.?

*May 12, 2011*

**science**

DNA is copied during a process called.?

*May 12, 2011*

**math**

$80 $110 $130 $160 $210 $650

*May 11, 2011*

**physics**

A mass was dropped from a height of 20m. (a) find its speed at impact. (b) what can you say about the initial GPE of the mass and the KE of the mass just as it hits the ground?

*March 15, 2011*

**physics**

From a tree that is 15m tall, a fruit of mass 2kg falls to the ground. (a) find the initial GPE (b) find the speed at impact (c) find the KE at impact (d) how much energy was lost to heat and sound after the mass came to rest?

*March 15, 2011*

**physics**

A mass of 2kg was thrown straight up with a speed of 15m/s. (a) find the initial KE (b) how high does the mass rise? (c) what is the GPE of the mass at the highest point?

*March 15, 2011*

**chemistry**

calculate the mass in grams of .354 moles of NH3

*January 25, 2011*

**algebra 2**

what is the quadratic function that has the roots (4+3i) and (4-3i)

*January 19, 2011*

**math**

How many people were at a party if There were 105 handshakes at a party and if each person at the party shook hands with exactly once with every other person. The answer is 15. How do I write the problem?

*October 25, 2010*

**Math PIZZAZZ**

it cant be halo...there are 14 answers

*October 25, 2010*

**9th grade**

What is an example of natural selection in everyday life?

*September 17, 2010*

**Art**

okay, ummm my teacher wants us to write down what a proportion and scale isand what an economy is in art. So what are those????!!! I'm so confused! :P plz help!

*September 17, 2010*

**math**

ummm how old r u?

*September 17, 2010*

**Physics**

highway saftey engineers build soft barriers so that cars hittingthem will slow down at a safe rate. a person wearing a saftey belt can withstand an acceleration of 300 m/s how thick should barriers be to safely stop a car that hits a barrier at 110 km/h

*September 9, 2010*

**physics**

a plane travels 5.0 x 10^2 while being accelerated uniformly from rest at the rate of 5.0 m/s. what final velocity does it attain?

*September 9, 2010*

**Physics**

an astronaut drops a feather from 1.2 m above the surface of the moon. if the acceleration of the gravity on the moon is 1.62 m/s down , how long does it take the feather tho hit the surface

*September 9, 2010*

**physical science**

The density of copper is 8.92 g/cm (cubed). If you plotted the mass of copper in grams versus the volume in cubic centimeters, what would the slope of the line be?

*September 1, 2010*

**algebra2**

Ms. Sue is only trying to tell you to do your homework!

*August 29, 2010*

**Government Check**

^^agreed.

*June 23, 2010*

**5th grade Math**

?????? i don't get it

*September 4, 2009*

**Physical Science**

30,000N work=force times distance 300 times 100= 30,000

*May 3, 2009*

**riddles**

is this home work

*April 21, 2009*

**CIVICS DUE TOMARROW PLZ ANSWER**

umm this doesn't answer my question. I can not find it on the website.

*April 21, 2009*

**chemistry home work**

2 examples on sediment plz reply fast...

*November 21, 2008*

**algebra**

in my workbook it says give the opposite of each expression and the problems are: -10t+21 -x+2z there are alot more but i thought if someone explained a couple of these to me maybe id understand the rest. idk just please help me!!!

*August 26, 2008*

**Physics**

Predators

*April 30, 2008*

**Basic Math**

composite means that the # can be divided by one and it's self. so that means the anser is B

*January 22, 2008*

**spelling**

It says find 1 vowel and 1 consonat

*January 22, 2008*

**spelling**

there's a problem on my worksheet and it gose like this "to add the er suffix to words ending in a stressed sylable with one vowel and one consonant,___________________________." I've got that but then it asks for an example that's ware i'm stuck.

*January 22, 2008*

**algebra**

if the line is 3-5 then draw 2 lines from the 3 (on the side) and the 5 (on the bottem)and conect then.

*January 22, 2008*

**math**

THAT IS HARD WHAT GRAGE ARE YOU IN 100th!!!!

*January 22, 2008*

**chemistry**

what if more NO is added?

*December 6, 2007*

**chemistry**

for this reaction: 2NO + heat <-> N2 +O2 which way would the equillibrium shift if catalyst is added?

*December 6, 2007*

**science**

5 reasons that the eagle helps the ecosystem?

*October 29, 2007*

**Trig**

How do you tidy it up?

*September 13, 2007*

**World History**

What was the Bill of Rights influenced by? This is an interesting article that will help you answer your question. http://bessel.org/billrts.htm

*May 24, 2007*

**Geometry**

I need help with vertices! The vertices of triangle FGH are F(1,1), G(3,-5),H(6,0). Find the coordinates of the vertices after a refelection over the y-axis. I'm not sure how to do this. Is there a certain formula I need to know? The reflection across the y-axis negates ...

*September 13, 2006*