Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 41

**triganamatry**

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

**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?

**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?

**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!!

**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 ...

**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 compres...

**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 co...

**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?

**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?

**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?

**Pre-calculus**

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

**Accounting**

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

**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.

**stats**

97.5%

**math**

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

**math**

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

**Math**

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

**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?

**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 1...

**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?

**science**

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

**science**

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

**science**

convert 270g to moles

**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?

**10 grade chem**

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

**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!

**chemistry**

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

**square footage**

There is a wooden fence around your water treatment plant that measures 6 feet tall and 95 feet long. Your supervisor has instructed you to determine how many square feet of area this fence has on both side so that you can panint it. He tells you not to count the two gates tha...

**math**

Factor: 20+22v-12v^2

**MAT116**

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

**chemistry**

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

**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.

**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...

**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?

**Environmental Science**

Thank you.

**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...

**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 d...

**physics**

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

**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,...

**final project**

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

**math**

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

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