Saturday

December 20, 2014

December 20, 2014

Total # Posts: 119

**physics **

Dolphins of the open ocean are classified as Type II Odontocetes (toothed whales). These animals use ultrasonic "clicks" with a frequency of 54.9 kHz to navigate and find prey. Suppose a dolphin sends out a series of clicks that are reflected back from the bottom of ...
*December 3, 2014*

**physics **

A guitar string 61.8 cm long vibrates with a standing wave that has three antinodes. Which harmonic is this?
*December 3, 2014*

**Physics **

A playground merry-go-round of radius R = 2.15 m has a moment of inertia of I = 256 kg * m2 and is rotating at 10.9 revolutions/min about a frictionless vertical axle. Facing the axle, a 29.6 kg child hops onto the merry-go-round and manages to sit down on its edge. What is ...
*November 10, 2014*

**math**

Al's Rental's charges $25 per hour to rent a sailboard and a wet suit. Wendy's rentals charges $20 per hour plus $15 for a wet suit. Find the number of hours for which the total charges for both companies would be the same.
*September 8, 2014*

**math**

tia is bulding a fence around her backyard she has 40 feet of fence dose she have enough
*April 29, 2013*

**chemistry**

A sample of oxygen that occupies 1.00x10^6 mL at 575 mm Hg is subjected to a pressure of 1.36 atm. What will the final volume of the sample be if the temperature is held constant?
*February 27, 2013*

**math**

If it is 18 degrees fahrenheit, what would be the temperature if it dropped 58 degrees fahrenheit?
*January 29, 2013*

**calculus**

evaluate the integral I= ∫(0,∏/4) ((5-3e^(-tanx))/(cos^(2)x))dx
*November 12, 2012*

**math**

what is the slope-intercept form of 16x-y=8
*October 25, 2012*

**Chemistry**

what is the mass of Cu from 5.80 kg of CuFeS2?
*September 17, 2012*

**Math**

What is 11twefths of 24
*February 7, 2012*

**Grade 10-Math**

i understand how you got the answer i just don't get why i don't put 5x+4y before the equation because i have been for all the other ones and i got those ones right.. for example this one: 6x+5y= 7 x-y= 3 i isolated the second equation into y=3+x so: 6x+5y(3+x)=7 6x+15...
*September 24, 2011*

**Grade 10-Math**

x+2y=3 5x+4y=8 I isolated x+2y=3 to make: x=3-2y then i began to sub in equation one with equation two: 5x+4y(3-2y)=8 5x+12-8y=8 after that i began to try to solve the equation but my answers were not correct. any help would be greatly appreciated!
*September 24, 2011*

**math grade nine**

THANKS FOR ALL THE HELP!!!! :)
*April 13, 2011*

**math grade nine**

Ms Sue, Can you explain how you substitute the 4 for the p. I'm not sure if I have to add 2with the 4 or do I multiply 2 with the 4. 4-3+2( 4) -9 +0
*April 13, 2011*

**math grade nine**

can someone please tell me if this answer is correct p-3+2p-9=0 p+2p-3-9=0 3p-12=0+12=0 3p/3 = 12/3 p=4
*April 13, 2011*

**grade nine math Polynomials**

4s + 3 -s = -6
*April 13, 2011*

**grade nine math Polynomials**

alright? so do you think i should question my own teacher?
*March 25, 2011*

**grade nine math Polynomials**

it was a 5 sided pentagon but the problem only gave me 3 dimensions.
*March 25, 2011*

**grade nine math Polynomials**

Sorry I should of stated that the 5 sided enclosure only gave 3 dimensions that's why I multiplied by 5. This is why I was unsure.
*March 25, 2011*

**grade nine math Polynomials**

Mr. Smart just bought a new dog named Fluffy. Mr Smart would like to enclose a play space for Fluffy in his back yard. The 5 side play space has the dimensions, in metres. They are x +11, 2x-4,3x. Write a simplified expression for the number of metres of fencing needed to ...
*March 25, 2011*

**math -fractions**

Order from least to greatest 1/2, 9/19, and 8/15
*January 25, 2011*

**grade nine space**

Compare the following objects in the our Solar System in terms of 1. Where they are located and 2. What they are composed of : Sun Terrestrial planets Jovian planets Asteroids Comets Meteroids
*January 17, 2011*

**grade nine space**

What is the difference between the terms rotation and revolution? I need to use the Earth to support my answer.
*January 17, 2011*

**biology**

List,explain and provide an example of 3 natural interactions that exist between species.
*January 2, 2011*

**grade 9 science biology**

What activities increase the amount of carbon dioxide in the atmosphere? What activities decrease the amount of carbon dioxide in the atmosphere?
*January 2, 2011*

**grade 9 science biology**

What happens to the available energy in an ecosystem?
*December 29, 2010*

**grade nine science biology**

With aid of a diagram , I need to illustrate and explain how the following nutrients are cycled through each 4 spheres. Carbon nitrogen and water
*December 29, 2010*

**grade nine science physics**

Do these SI measurements sound correct Voltage = volt Current = ammeter resistance = ohm
*December 29, 2010*

**grade nine science physics**

Define the following terms and state their SI unit of meausrement? voltage,current, and resistance
*December 29, 2010*

**grade nine science**

How are elements arranged in the periodic table? Its for my exam notes and I don't have this answer anywhere in my book and I need it because its on the exam review.
*December 29, 2010*

**grade 9 science chemistry**

List three subatomic particles that make up the atom. What charges does each particle have and where in the atom are they located?
*December 29, 2010*

**grade 9 GEOGRAPHY**

I am doing a project on the mixedwood plains. I have written this question before but I just want to know if I am on the right track. I need to to find suggestions on how the sensitive tourist can minimize their impact on the local environment and community? Would these ...
*November 30, 2010*

**geography grade nine**

Does eco tourism and sensitive tourist the same thing?
*November 29, 2010*

**grade 9 GEOGRAPHY**

I posted a question earlier about the sensitive tourist I am a little confused on what the question is asking exactly. "Sensitve tourist" suggestions so that visitors can minimize their impact on the local environment and community. My paper is on the Mixedwood ...
*November 29, 2010*

**grade nine geography**

I need to have "Sensitvie Tourist" suggestions so that visitors can minimize their impact and local environment and community on the Mixedwood Plains. Thanks
*November 29, 2010*

**9th grade geography**

What are some negative facts for the Montane Cordillera. Also I am looking for some positive and negative facts for the Prairie Ecozone and Mixed Wood Plain ecozone. Need help please thank you!
*November 27, 2010*

**9th grade geography**

I am looking for any information on the culture of the mixedwood plains.
*November 27, 2010*

**grade 9 geography**

I am doing a project on three ecozones of canada. The three which I have picked are Montane Cordillera, Praire and Mixwood plains. I am trying to find some info on their cultual and recreational activities. Does anyone know of some great websites. Thanks
*November 27, 2010*

**6th grade SCIENCE**

I am doing a project on echinoderm and one of the questions is asking about if they have a circulatory system. I have found information that they have a poorly defined opened circulatory system. I also need to answer the difference between if it's closed or open and this I...
*November 19, 2010*

**6th grade math**

A spider has 8 legs. An ant has 6 legs. There are a group of spiders and a group of ants. The groups have equal numbers of legs. What is the least number of spiders and ants in each group.
*October 3, 2010*

**9th grade science**

Is there a relationship between the pH and the colour of soil? if so describe the realtionship.
*September 29, 2010*

**grade 6 math**

Clayton and Olivia played a computer game. Olivia's final score was 2 306 421 and Clayton's was 2 302 972. Show these numbers on a number line. Whose score was greater? I know which score is greater but I am having trouble figuring out the number line and what to go by...
*September 29, 2010*

**9th grade math**

what does (-3) + (-15) divided by (+5) (-6) equal? need help.
*September 11, 2010*

**9th grade science**

What is a diverse ecosystem?
*September 11, 2010*

**9th grade science**

Describe the ways in which the earth's spheres overlap each other?
*September 8, 2010*

**9th grade science**

Describe the ways in which the earth's spheres overlap each other?
*September 8, 2010*

**college physics**

A 915 kg two-stage rocket is traveling at a speed of 5.50×10^3 m/s with respect to Earth when a pre-designed explosion separates the rocket into two sections of equal mass that then move at a speed of 4.00×10^3 m/s relative to each other along the original line of ...
*May 3, 2010*

**college physics**

How fast (in rpm) must a centrifuge rotate if a particle 9.50 cm from the axis of rotation is to experience an acceleration of 113000 g's? Need help please.
*May 3, 2010*

**college physics**

A 280 g wood block is firmly attached to a very light horizontal spring, as shown in the figure . The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this position, how far ...
*May 3, 2010*

**7 grade math**

a scale model race car is 11in. long,3in. wide,2in. tall.the actual race car is 22ft. how wide is the actual race car?
*April 21, 2010*

**physics**

A rocket of total mass 2580 kg is traveling in outer space with a velocity of 111 m/s. To alter its course by 32.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 1560 m/s, how much ...
*March 11, 2010*

**grade five science**

why do you think it would be very dangerous to lose a quart of blood in an accident?
*March 6, 2010*

**5th grade science**

Describe the function of the lungs in the circulatory system.
*March 6, 2010*

**phsycis**

A 62 kg hiker climbs to the top of a 3700 m-high mountain. The climb is made in 5.0 h starting at an elevation of 2600 m. Calculate the average power output in watts. Calculate the average power output in horsepower.
*March 2, 2010*

**physics**

How fast must a cyclist climb a 4.0 degree hill to maintain a power output of 0.35 hp? Neglect work done by -friction, and assume the mass of cyclist plus bicycle is 83 kg.
*March 1, 2010*

**physics**

A 1300 kg sports car accelerates from rest to 90 km/h in 7.0 s. What is the average power delivered by the engine?
*March 1, 2010*

**college physics**

A 147 g baseball is dropped from a tree 12.0 m above the ground. If it actually hits the ground with a speed of 8.00 m/s, what is the magnitude of the average force of air resistance exerted on it?
*March 1, 2010*

**5th grade**

An empty trailer has a mass of 850 kg. When the trailer carries a load, its mass is 1.4 t. What is the mass of the load?
*February 28, 2010*

**math**

what is 2438divided by 40 equal
*February 18, 2010*

**grade five math**

A freight train travel 100km every hour. It passes over a river at 10:00AM. Four hours later, a passenger train passes over the same river. The passenger train travels 150km every hour. When does the passenger train overtake the freight train? How far are they from the river?
*February 8, 2010*

**math grade five**

A freight train travels 100km every hour it passes over a river at 10:00am four hours later a passenger train passes over the same river the passenger travels 150km every hour when does the passenger train overtake the freight train? How far are they from the river?
*February 8, 2010*

**8th grade**

Thank you so much!
*January 10, 2010*

**8th grade**

Are all viscosities of fluids the same?
*January 10, 2010*

**math**

what is 8/7 + 7/8?? PEYTON
*November 9, 2009*

**6th grade**

1.5 or 1.50 PEYTON
*November 9, 2009*

**math**

is it 2 and a half/4??? PEYTON
*November 9, 2009*

**math**

ok well now i need to know what 5/8 is equal to with a denoninator of 4
*November 9, 2009*

**math**

Is 10/4 equal to 5/8??? PEYTON
*November 9, 2009*

**science**

A biologist finds a cell with what appears to be two nuclei(nucleus) what conclusion might you make about why this cell appears to have two nuclei?
*September 26, 2009*

**math**

thank you!! and How many multiples are there like in all?? Peyton <3
*September 3, 2009*

**math**

Ok. So I have a game board with my homework and the numbers are 1,2,3,4,5,6,7,8,9,10,12,14,15,16,18,20,21,24,25,27,28,30,32,35,36,40,42,45,48,49,54,56,63,64,72, and 81. And the uestion is List 5 multiples of 3 that are not on the game board. Can you help. Peyton <3
*September 3, 2009*

**7th grade math**

thanks i got the answer
*August 25, 2009*

**7th grade math**

Sorry that is suppose to be He saves $8
*August 25, 2009*

**7th grade math**

Jared wants to save $100 to buy a tennis racket. He saces $8 each week, and his mother gives him a extra $0.25 for each dollar he saves. Determine the number of week it will take Jared to save $100. I am pretty sure the answer is 12 weeks and he would have $5 dollars left over...
*August 25, 2009*

**6th grade math**

thank you
*May 13, 2009*

**6th grade math**

How many oz are in 12 cups
*May 13, 2009*

**Algebra**

I am stuck on this problem Identify the degree of each term of the polynomial and the degree of the polynomial in -8x^3 + 6x^2 +5x +5 The degree of term 1 = The degree of term 2 = The degree of term 3 = The degree of term 4 = does the degree of the polynomial = 3 ?
*May 4, 2009*

**6th grade sc. st.**

I think it is Representative
*April 23, 2009*

**6th grade sc. st.**

Which democracy lets the people vote for the issues??? Direct democracy or Representative
*April 23, 2009*

**6th grade sc. st.**

Thank you!!! I thought it was that but I wasn't completly sure.
*April 23, 2009*

**6th grade sc. st.**

What type of government rules with divine right???
*April 23, 2009*

**6th grade math**

Hannah, Jim, and Julie are on a hiking trip with 2 children and their two dogs. They come to a huge lake with an island int he middle. Nearby is a small sailboat. The sailboat can hold 1 adult, or 2 kids, or a kid and a dog. Everyone can sail the boat except the dogs. How many...
*April 22, 2009*

**6th ggrade math**

Will some please help me figure this out??? ?x?/?+?x?/?-?=6 You can only ues these numbers to figure this out, 2,4,5,7,8,9,10
*April 14, 2009*

**6th grade math**

Will some please help me figure this out??? ?x?/?+?x?/?-?=6 You can only ues these numbers to figure this out, 2,4,5,7,8,9,10
*April 14, 2009*

**geography**

How do people modify the environment by interacting with it through urban development and through leisure activites?
*April 7, 2009*

**7th grade**

How would you describe how you could use a set of temperature probes connected to a computer to test how quickly various solids transfer heat.
*March 31, 2009*

**7th grade**

Does anyone know why chef's stick metal objects into potatoes when they cook them?
*March 31, 2009*

**6th grade math**

thank you
*March 25, 2009*

**6th grade math**

what I dont get it
*March 25, 2009*

**6th grade math**

If a card contains the number 47229 and mrs.s picks a 7, the card is worth 7000 points. If she picks a 2 its worth 220 point. Ashley has these cards 49298 83483 43281 If mrs.s pick a 3 how many points will she have? What digit will make he have the highest score possible?
*March 25, 2009*

**6th grade math**

is it 14,000 and thank you so much
*March 24, 2009*

**6th grade math**

Please help!!!!! Mr.lucky won the lottery,so he decided that he would split the money with his 4 kids. His older son was givin 50% of the winnings. 25% was givin oto his daughter Jane. Gary would get 20% and Jodi would get $700. How much did Mr. Lucky win in the lottery.
*March 24, 2009*

**7th grade**

What is the greenhouse effect and how does it effect the atosmphere?
*January 22, 2009*

**7th grade**

Can someone please help i need a six=link food chain beginning with a shark as a top predator. I need to label the producers, primary cconsumer and secondary consumer. Thanks
*January 14, 2009*

**7th grade**

I am needed to build a seigneury model for my life in a Segneurial System project. Does anyone have any ideas on how to build one.
*January 11, 2009*

**7th grade**

Does anyone know where I can find video clips of the blue planet ecspecially the part on the coral reef?It is related to the question about why is the coral reef an ecosystem?
*January 7, 2009*

**7th grade**

Why is the coral reef an ecosystem?
*January 7, 2009*

**7th grade**

I created a food chain with three organisms corn,cow,and humans. Can only pleas tell me if I can make a food web out of my chain and what other organisms would i add?
*January 5, 2009*

**7th grade**

Can anyone help with some ideas in constructing a food web of the organisms found in a landfill site. Thanks.
*January 5, 2009*