07/19/22

Did I Get This Simple Math Average Problem Right?

Hi! I need to find students to fill a classroom with. There are 2 classes that I need to fill 50% of each class and 7 classes that I need to fill 33.3% of each class. Overall, what is the average... more
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07/19/22

At what temperature, in °C, is a certain reaction at equilibrium if ∆H = +84.9 kJ/mol and ∆S = +170.2 J/mol ･ K?
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07/18/22

What is the resistance 𝑅R of a 47.1-47.1-m-long aluminum wire that has a diameter of 8.45 mm?8.45 mm
What is the resistance 𝑅R of a 47.1-47.1-m-long aluminum wire that has a diameter of 8.45 mm?8.45 mm? The resistivity of aluminum is 2.83×10−8 Ω·m.
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07/18/22

Hydrostatic pressure of pool water
Indoor Pool / 175,000 gallonsWhat is the pressure of the water (psi) when the drain opens to allow it to empty ?
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07/18/22

Mathematics question
Find the highest common factor of 993 + 1013 and 996 + 1016
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07/18/22

Show that the center of gravity of the arc of the cycloid x=aθ+Sinθ and y=aθ-Cosθ in the positive quadrant is describe below:[(π-4/3)*a, 2/3*a]
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07/17/22

How to break down the math for solving problems concerning equilibrium and partial pressure
2.76=(x)(x)/(0.04-2x)2 , the answer found was 0.0292, how was this found step by step?
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07/16/22

Find the centroid of region R
Let R be the region below the curve y=4-x2, to the left of y=3x and above the x-axis. Find the centroid of the region R
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07/16/22

What is the base's Kb?
A certain base has pKb = (1.127x10^1). What is the base's Kb?
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07/15/22

Find the area between y = √ x + 5 and y = − √ x + 4 . Find the limits of integration by reading the graph. If needed, round your answer to 2 decimal places.
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07/15/22

A body covers 200 c m in the first 2 seconds and 220 c m in the next 4 seconds. The velocity of the body at the end of the 7 t h second is :
a. 40m/sb. 200m/sc. 10m/sd. 5m/s
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07/14/22

Chemistry 102: Acid Equilibrium: Calculate Q and answer multiple choice question
9). At 25oC the Ksp for PbCl2 is 1.6 × 10–5.part 1). Calculate Q  for the following: 125.0 mL of 0.0900 M Pb(NO3)2 is mixed with 75.0 mL of 0.0200 M NaCl at 25oCpart 2). Will a precipitate form... more
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07/14/22

Chemistry - Individual Gas Laws
A sample of gas is put into a container with a movable piston that will allow pressure to be maintained. If the sample of gas was initially at 20.5 degrees Celcius and occupied a volume of 3.30 L,... more
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07/14/22

calculate the work of electric field force...
Positive charge Q is evenly distributed on a thin ring with a radius of R, the centre of which is point O. Axis OP is pendicular to the plane containing the thin ring. The length of OP is 2R.... more
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07/13/22

Jolene invests her savings in two bank accounts,

Jolene invests her savings in two bank accounts, one paying 5 percent and the other paying 12 percent simple interest per year. She puts twice as much in the lower-yielding account because it is... more
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07/13/22

find the ratio of the light intensity of the transmitted light to the light intensity of the incident light is?
A beam of linear polarized light is perpendicular to a polarizer. Set the vibration direction of the linear polarized light and the transmittance axis of the polarizer at a π/3 angle, then find the... more
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07/13/22

Find the volume of the solid that results when the region enclosed by y = x^2 and y = x^3 is revolved about the line x = 1.
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07/13/22

How is the distance 23m?
Two boxes of mass 30.0 kg and 10.0 kg are at rest side by side (Figure 5). You apply a force of 3.0* 10*2 N on the first box for 5.0 s, and they both slide across the floor. The larger box has a... more
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07/12/22

Finding pH and pOH
The concentration of H2S in a saturated aqueous solution at room temperature is approximately 0.1 M. Calculate [H3O+],[H3O+], [HS−], and [S2−] in the... more
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07/12/22

compound interest account
The "Present Value" of a compound interest account is the amount of money you need to invest in the account today to accumulate A dollars. You can calculate Present Value by solving for... more
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07/11/22

I need help with this problem!!
When after combining 74.00mL of 0.3948M strontium nitrate solution with 100.0mL of 0.4107M potassium chromate solution, yellow precipitate forms, SrCrO4(s). If Ksp(SrCrO4) = 3.571x10-5, what are... more
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07/11/22

Chemistry 102: Acids: Choose one or more salts that produces a basic solution in water, and write the reaction responsible for being basic.
15.part 1) Which of the following salts produces a basic solution in water: NaF, KCl, NH4Cl? Choose all that apply. Choose one or more:NaFKClNH4ClNone of the choices will form a basic solution.part... more
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07/10/22

One particular roundabout has a radius of 40m. What is the maximum speed a 1200 kg car can go around it without skidding if

a) the road is dry and the coefficient of static friction is 0.8b) the road is icy and the coefficient of static friction is 0.2
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07/10/22

I need help with this problem I'm getting the wrong answers when doing the quadratic formula
Keq = 3.143x10-5 for the reaction below:NH2CH2COOH(aq) + C2H5OH(aq) <--> NH2CH2COOC2H5(aq) + H2O(l)So if you were to combine 5.171g of NH2CH2COOH and 8.167g of C2H5OH inenough water to make... more
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07/10/22

Mathematic question
This is just a part of the solution of a question.k! > 2k(k+1)k! > (k+1)2k(k+1)! > (k+1)2k(k+1)! > 2 * 2k(k+1)! > 2k+1Why is (k+1)! , but not kk!+k! ?
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