Friday

February 24, 2017
Total # Posts: 52

**Science**

The ratio of mass of hydrogen to mass of oxygen in water is 1:4. How much oxygen will there be in 80g of water

*December 6, 2016*

**Chemistry**

What volume of concentrated hydrochloric acid (12.0 M HCl) is required to make 2.0 liters of a 3.0 M HCl solution?

*March 25, 2016*

**physics**

A bob of a pendulum 100cm long swings through 20cm,find theta in radian and degree

*February 13, 2016*

**maths**

A boy 1.2m tall stands 6m away from the foot of a vertical land pole 4.2m long. If the land is at the top of the pole,(a)represent this information in a diagram (b)calculate the (I)length of the shadow of the boy cast by the land (ii)angle of elevation of the land from the boy...

*January 10, 2016*

**Chemistry**

Oganic solvents are not suited to be heated with one of the followings: Oil Bath Electric hot plate Water bath Bunsen burner flame 2 Which of the following is not an inflammable liquid ? Water Ethanol Kerosine Benzene 3 These are some safety precausions necessary in a ...

*October 23, 2015*

**physics**

a stone is thrown horizontally with an initial velocity of 15m/s from a tower 20 meters high. How long does the stone take to reach the ground?

*July 14, 2015*

**Chemistry**

how many moles of glucose can be burned "biologically" when 10.0 mol of oxygen is available? C6 H12 O6 + 6CO2 -> 6CO2 +6H2O

*January 23, 2015*

**math**

What is the value of the variable cost ? If the break even point is $ 130, the fixed cost is $ 330, selling price per unit is $ 25. (3 marks)

*June 22, 2014*

**grammar**

I please I need identify each sentece is a complex,exlamation,declarative or interrogative. Oh no! do you wantto play in the garden. in the story,the author told how useful a led can be. she play the piano. I love you. my brother baked a cake last night. the car broke down,but...

*June 21, 2014*

**grammar**

Tim likes soup,so Mary bought tomatoes

*June 21, 2014*

**triganamatry**

how do you find the exact value of sin^-1(-square root of 3 divided by 2)

*February 24, 2014*

**physics**

A horizontal spring has a spring constant k = 23.2 N/m. A 0.165 kg mass is attached to the spring and is free to slide on a frictionless surface. The mass is pulled 26.2 cm from the equilibrium point. What is the speed (m/s) of the mass as it passes the equilibrium point?

*February 2, 2014*

**Math (logs)**

In x = -3 find x. I worked it out like this e^inx= e^-3 then I got x = 1/e^3. Is that correct?

*December 8, 2013*

**Math**

1. 5(x^2 +2x-6) - 3(2+x-x^2) 2. 2x^4-5x(x^3 -y) + 2y(5x) 3.Factor 2x^5+6x4+4x^3+12x^2 4. Factor 9y^2-18y +8 Please help. Thank you!!

*October 4, 2013*

**physics**

a machine weighing 1500N is supported bt two chains attached to some point on the machine.one of these ropes goes to the eye bolt in the well & is inclined 30 degrees to the horizontal & the other goes to the hook in ceiling & is inclined at 45 degrees to the horizontal. find ...

*March 23, 2013*

**Physics**

A 0.9 kg block is moving with speed 7 m/s towards a spring that has a spring constant of 1.3 N/m. The block hits the spring and compresses it. a) How far did the block compress the spring?(draw a pie graph also) b) When the block is still moving and the spring has been ...

*March 19, 2013*

**Physics**

A 3.4 kg mass is shot by a sling shot with an initial velocity of 4.5 m/s. When the mass is in the air at a height of 50m, it is still traveling upwards. What is its velocity at that height? Draw energy pie graphs for the initial and final state. (Hint: You will have to use ...

*March 19, 2013*

**Physics**

A 4 kg weight falls on a spring that is facing up. The weight compresses the spring 0.25m. If the spring constant of the spring is 3.5N/m, how high was the weight when it was dropped?

*March 19, 2013*

**Physics**

A pendulum is released from some height. When it reaches the bottom of its swing, its speed is 2.5 m/s. What is the initial height of the pendulum?

*March 19, 2013*

**Physics**

A pendulum is released from some height. When it reaches the bottom of its swing, its speed is 2.5 m/s. What is the initial height of the pendulum?

*March 19, 2013*

**Pre-calculus**

Find the correct end behavior for a given polynomial function. 3.36x^4+8x^2+x-9

*January 13, 2013*

**Physics**

swag

*October 3, 2012*

**Accounting**

A $15 credit to Sales was posted as a $150 credit. By what amount is Sales in error? my answer is $135 overstated

*September 21, 2012*

**Math**

I am in need for help on laws of exponents. 1) 4/x^-3== I do not understand... 2)x^4/y^-3 = Early thanks.

*September 20, 2012*

**stats**

97.5%

*September 1, 2012*

**math**

The first three terms of a geometric sequence are as follows. 64, 32, 16 Find the next two terms of this sequence.

*May 4, 2012*

**math**

12, reason being the equation is 1320=x!(x-3)!

*April 25, 2012*

**Math**

Can anyone solve this rational inequality y-3/5 < y+2/10

*December 7, 2011*

**Physics**

A hammer slides down a roof that makes a 40.0 degree angle with the horizontal. What are the magnitudes of the components of the hammer's velocity at the edge of the roof if it is moving at a speed of 4.25m/s?

*November 17, 2011*

**physics**

Assuming they travel in one-dimension we can use the x(t)= vt+1/2 at^2. The slower boy will travel a distance X and the faster boy will travel a distance 100-X because X will be the meeting point. And there is no acceleration involved, so the equation will look like x=5t and ...

*September 2, 2011*

**Physics 2**

A pair of charges exert attractive forces of magnitude 2.4*10^-2 N on each other when they are separated by 2.0 m. The total charge of the pair is +3.0 Micro Coulomb. What is the charge on the object with positive/negative charge?

*September 1, 2011*

**science**

so would i divid the molar mass of c12 h22 o11?

*December 7, 2010*

**science**

convert 270g to moles

*December 7, 2010*

**6th grade**

A duck is 17 feet below the surface of a lake. The duck begins to head to the surface at a rate of 3 feet per second. Write an expression to describe the duck's position after s seconds?

*November 30, 2010*

**10 grade chem**

Thanks Ms. Sue have anything else she said that's not it cause that's what I gave her. Any other answers and I dnt believe bay leaf was in that answer

*November 7, 2010*

**10 grade chem**

Ok people my daughter myself and my husband have been unable to answer this question so your help would be appreciated. I asked hours ago but no one answered please help. What is the chemical aroma name for: basil, nutmeg and bayleaf thank you fo your help. HURRY!

*November 7, 2010*

**chemistry**

What are the chemical aroma names for basil, nutmeg and bayleves

*November 7, 2010*

**math**

Factor: 20+22v-12v^2

*August 31, 2010*

**MAT116**

Graph the line containing the given pair of points and find the slope. (5,2),(-4,-5)

*August 20, 2010*

**chemistry**

what is the percentage of water in Ba(OH)2 x 8H2O?

*July 8, 2010*

**Physics**

The angle of reflection is going to be 30

*January 4, 2010*

**6th Grade Science**

I don't understand how living things grow and develop. Can you help me? I have to do a project with pictures but I need to understand what I'm looking for.

*October 19, 2009*

**Physics**

That's the static coefficient of friction for the surface

*September 25, 2009*

**chemistry**

When 0.712 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 116C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not...

*May 18, 2009*

**Math**

Estimate the velocity of the groundwater flowing from a point 1000 feet from a creek. The point is 30 feet above the surface of the creek and the permeability of the subsurface is approximately 10-5. Approximately how long would it take the groundwater to reach the creek?

*March 23, 2009*

**Environmental Science**

Thank you.

*March 23, 2009*

**Environmental Science**

1. Estimate the velocity of the groundwater flowing from a point 1000 feet from a creek. The point is 30 feet above the surface of the creek and the permeability of the subsurface is approximately 10-5. Approximately how long would it take the groundwater to reach the creek? 2...

*March 23, 2009*

**Math: Fractions**

A group charters 3 identical buses and occupies 4/5 of the seats. After 1/4 of the passengers leae, the remaining passangers use only 2 of the busses what fraction of the seats on the two buses are now occupied? assume number of seats on all buses is 3x and in one bus x. how ...

*October 17, 2008*

**physics**

THANKS!!!!!!!!!!!!!!!!!

*September 29, 2007*

**physics**

I need help coming up a source of error for this like lab thing that we are doing class. So like we took this string with a rubber ball on it and the string went through a glass tube, and on the end of the string, so the like opposite end of where the ball (rubber stopper) is...

*September 29, 2007*

**final project**

what is a pearl? http://en.wikipedia.org/wiki/Pearl

*May 7, 2007*

**math**

how? 3x-(4+2x)= what do you want to do? Remove the parenthses. 3x-4+2x combine terms 5x-4.

*March 18, 2007*

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