Friday

April 25, 2014

April 25, 2014

Total # Posts: 52

**Physics**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...

**Algebra**

A fireman leans a 40-ft long ladder up against a building. The base of the ladder creates an angle of elevation of 32 degrees with the ground. How far is the base of the ladder from the base of the building? Round to the nearest whole foot, if necessary.

**Chemistry**

An equilibrium that would favour the products is A. NH4+(aq) + H2PO4-(aq)= NH3(aq) + H3PO4(aq) B. HCN(aq) + HS-(aq)= CN-(aq) + H2S(aq) C. HCO3-(aq) +,HBO3 2-(aq)= H2BO3-(aq) + CO3 2-(aq) D. HSO4-(aq) + HSO3-(aq)= H2SO3(aq) + SO4 2- (aq) The answer is C. But I don't underst...

**Chemistry**

An equilibrium that would favour the products is A. NH4+(aq) + H2PO4-(aq)= NH3(aq) + H3PO4(aq) B. HCN(aq) + HS-(aq)= CN-(aq) + H2S(aq) C. HCO3-(aq) +,HBO3 2-(aq)= H2BO3-(aq) + CO3 2-(aq) D. HSO4-(aq) + HSO3-(aq)= H2SO3(aq) + SO4 2- (aq) The answer is C. But I don't underst...

**Chemistry**

In the chlor-alkali process, the mass of NaCl(s) required to produce 0.793 kg of chlorine gas is _____ kg.

**Science**

In the chlor-alkali process, the mass of NaCl(s) required to produce 0.793 kg of chlorine gas is _____ kg.

**Pre-Calc**

Two lookout towers on Mount Abraham and Snow Mountain are 29 miles apart. A fire warden in each tower sees a forest fire. From Mount Abraham the angle formed with the line of sight to the fire and the line of sight to the other tower is 44 degrees. From Snow Mountain the fire ...

**capacitors**

how would you carry out a suitable test to determine the relationship between voltage and current when charging and discharging a capacitor

**math**

caleb and winona both travel by car to their friend's home. The distance winona traveled was 124 miles less than twice the distance caleb traveled. If winona traveled 628 miles, how far did caled travel?

**physics**

A wire of radius one meter is centered on the origin in the xy plane. This wire carries a total charge of +Q. Another wire of length two meters runs along the z-axis and is centered at the origin. It carries total charge -Q. What is the electric field vector at any point on th...

**physics**

A source of instantaneous potential V = 10sin(50pi t) is connected across a capacitor of capacitence 1 times 10power negative 6 F. calculate the maximum value of the current and phase difference between the current and the potential difference?

**Proofs Geometry **

What is the statement and the reason for Given: and mEGF∠=60 mAGF∠=°90; Prove: mAGB∠=°30. Thank you!

**Chemistry **

Hi Everyone, Please Give me two examples of organic compound that have two different functional side groups groups. Please list the functional side groups for each organic compound.

**Math Linear Algebra**

Find the inverses of the matrices. Let A = 1 2 5 12 b1 = -1 3 b2 = 1 -5 b3 = 2 6 b4 = 3 5 Find A^-1, and use it to solve the four equations. Ax = b1, Ax = b2, Ax = b3, Ax = b4

**Linear Algebra**

Find the inverse of the matrices if they exist. Use the algorithm introduced in this section. 1 2 -1 -4 -7 3 -2 -6 4

**Linear Algebra**

Find the inverse of the matrices, if they exist. Use the algorithm introduced in this section. 1 2 -1 -4 -7 3 -2 -6 4

**Chemistry**

What must be the molarity of an aqueous solution of trimethylamine, (CH3)3 N, if it has a PH=11.20?

**IT**

Can anyone tell me which WIMAX system you would use for last mile broadband ? with a link to a town the miles away ??? Mobile or fixed ??? Thnks

**science**

asprin (C9 H8 O4) is produced by the rection between salicylic acid (C7 H6 O3) and acetic anhydride(C4 H6 O3). Calculate the maximum mass of aspirin that can be obtained if you mix 50g of each of the reactants. The chem.equation for the reaction is as f.f C7 H6 O3(s) + C4 H6 O...

**10th Grade Chemistry**

SiH4

**Electr. and Magnetism**

1) A charge of 80nC is uniformly distributed along the x-axis from x= 0 to x= 2.0m. Determine the magnitude of the electric field at a point on the x-axis with x=8.0m. a] 30 N/C b] 15 N/C c] 48 N/C d] 90 N/C e] 60 N/C 2) 3 point charges, 2 positive and one negative, each havin...

**math**

vijay has 1/20 of a dollar in his pocket. what coins might he have?

**calculus**

a particle moves along the x-axis in such a way that its acceleration at any time t is given by a(t)= 6t - 18. At time t = 0, the velocity v(t) = 24. and at time t = 1, the position x(t) = 20 i have to find the expression for the velocity and what values t is at rest

**english**

where is the adjectives and the adverbs in the following paragraphe at the time lorraine hansberry was the yongest american playwriter ,the first woman ,and the first african american to receive the honor . her much celebrated play was A Raisin in the Sun.

**physics**

B=μ0I/2πr B1 = (4π×10^7)(8.0A)/(2π×0.030m) B2 = (4π×10^7)(-8.0A)/(2π×0.150m) BA = B1 + B2 B1 = (4π×10^7)(8.0A)/(2π×0.060m) B2 = (4π×10^7)(-8.0A)/(2π×-0.060m) BB = B1 + B2

**french**

microwave in french

**college**

The diameter of a wire should be 8 cm. It follows a normal distribution and has a standard deviation of 0.01 cm. A person tests each delivery by taking 5 samples, accepting the goods only if the mean is at most 8.01 a) Find the probability of type 1 error? b) A hypothesis test...

**science**

what does monitoring information indicate about trends in amount of atmospheric carbon dioxide?

**science**

what does monitoring information indicate about trends in amount of atmosphere carbon dioxide?

**math**

thnk so mch

**math**

The sum of 2 numbers is 26. Four times the first number plus twice the second is 70. What are the numbers?

**math**

an aircraft flew at 400km/h to its destination and returned at 500km/h. If the total trip took 9h, how far did it fly? The answer is 2000km but how

**algebra**

3square root of 9 - square root of 4

**algebra**

3ã9-4

**math**

One number is 5 more than another number. Four times the larger number plus 3 times the smaller is 97. find the numbers. Show your work.

**math**

the sum of two numbers is 51. Twice the first plus 4 times the second is 128. What are the numbers? Show your work.

**math**

2/6

**1st grade**

36

**economics**

The Midnight Hours, a local nightclub earned 100,000 in accounting profits last year, this year the owner, who had invested 1,000,000 in the club, decide to close the club. What can you say about the economic profit (and the rate of return) in the night-club business?

**economics**

Investors have set the following expectations for profitability and earnings: ROI first year must be at least 17% Turnover in the first year is budgeted at DKK 3,400,000, oo excl. VAT and the total investment Amounts to DKK 4.000.000, oo excl. VAT. 1.1 How much profit should b...

**algebra**

how many times greater is 2.6 x 10^7 than 1.3 x 10^5

**algebra**

solve for b when a=55 a=radical sign on 25b

**algebra**

(-s^2t)^5(t^3)

**algebra**

how to simplify this question (-m^2n^3)^3

**math**

i think its 37.50

**Algebra**

I am not given an x value, it is an equation, that has to be simplified and this is the result.

**Algebra**

What is the absolute value of (-x - 6)?

**Algebra**

g(- 1) = 10 - (-1)/2 + - 1 = 19/2 nineteen over two b. all reals c. 21 + t I think this is correct, I am rusty.

**algebra**

The x CANNOT be zero because the denominator cannot be zero or it will be undefined. You solve for the denomn by 19x = 0 and you get x = 0 so

**trig**

Since the angle in in QIII, use the cos=- 1/2 and sin= -sqrt3/2 and the inverse tan function on your calculator since tan is the y/x and is equal to -sqrt3. angle is 60

**chemistry**

The freezing point of a solution is A. higher than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstruction by solute particles. B. lower than the freezing point of the solvent alone be...

**Math**

you are gay

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