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herp_derp
Questions and answers by
herp_derp
Questions (2)
Do alloys have the same properties as their individual elements?
1 answer
424 views
Please help me with this problem.
Simplify. √(-24 - 10i)
4 answers
2,555 views
Answers (135)
Let N = Norman's age S = her son's age Norman is now 4 times older than her son. N = 4S Three years ago, the sum of their ages was 49. (N - 3) + (4S - 3) = 49 Substitute N for 4S. Solve for S. 4S - 3 + 4S - 3 = 49 ... S = 6.875 Thus... N = 4(6.875) = 27.5
Volume of a Cone: V = πr²h/3 Since 2/3 is filled with sand, 1/3 must not be filled with sand. V = 1/3 [π(1.2 cm)²(15 cm)/3] V = 7.54 cm³
Correction: In Part C, it should say upward, not downward.
Part A: weight at rest = 85 kg Part B: 9.8 m/s² - 2.35 m/s² = 7.45 m/s² W = (7.45 m/s²)(85 kg) = 633.25 N Part C: a = F/m = (700 N)/(85 kg) = 8.24 m/s² (downward) Part D: to feel "weightless," acceleration must be 9.8 m/s² 9.8 m/s² - 9.8 m/s² = 0
(x + y)/2 = 81 x - y = 26 x + y = 162 x - y = 26 ---------------- 2x = 188 x = 94 94 - y = 26 y = 68
a + b + c + d + e = 100 a + b = 30 b + c = 36 c + d = 49 d + e = 47 a = 30 - b c = 36 - b d = 49 - c = 49 - (36 - b) = 13 + b e = 47 - d = 47 - (49 - c) = c - 2 = (36 - b) - 2 = 34 - b (30 - b) + b + (36 - b) + (13 + b) + (34 - b) = 100 113 - b = 100 b =
x = 13 m/s y = 18 m/s r = √( 13² + 18² ) = 22.2 m/s angle = tan⁻¹ (18/13) = 54.2°
at an angle of 45 degrees
rev = (6.5 min)(2.4 rpm) = 15.6 rev
2.680 x 10⁴ 2.68 x 10⁴ 2.7 x 10⁴ 3 x 10⁴
I assume the spaces indicate that it is a mixed number. 6 + 2/5 = 30/5 + 2/5 = 32/5 3 + 7/10 = 30/10 + 7/10 = 37/10
But 1 C = 274.15 K
I see the error. The specific heat of water is Joules per grams CELSIUS (not Kelvin). q = (2000 g)(4.184 J/gºC)(3ºC) = 25104 J
Let me start you off, but you have to figure it out from there. pH = pKa + log ([A-]/[HA]) Solve for ([A-]/[HA]). So you may set it up as pH = pKa + log x Now, solve for x...
The standard heat of formation for any element in its natural state is zero. Therefore, ΔH°f for Ni(s) is zero.
a fraction is basically division between two numbers 65/63 = (63 + 2)/63 65/63 = 63/63 + 2/63 65/63 = 1 + (2/63)
Decent answer. However, it is a common misconception that the Panic of 1837 was entirely Jackson's fault. Yes, he did withdraw federal funds from the federal bank and he did issue the Specie Circular. But other causes were easy credit (bad loans) and the
h = independent c = dependent "c" is basically the "output" value once you "input" a value for "h." Thus, The value of "c" depends on the value of "h."
Ratio of Lengths 4:5 Ratio of Perimeters 4:5 (Remember you are adding sides proportional to each other; thus, the ratio will remain the same.) Ratio of Areas 16:25 (In here, the ratio is squared. You may test with numbers if you wish.)
It's actually easier than it seems. Just requires simple stoichiometry. Balanced Equation: Cr₂O₃ + 2 Al -> Al₂O₃ + 2 Cr 28.6 g Cr * (1 mol Cr / 52.00 g Cr) * (1 mol Al₂O₃ / 2 mol Cr) * (101.96 g Al₂O₃/ 1 mol Al₂O₃) = 28.0 g Al₂O₃
100 mL * 1.02 g/mL * 0.7 = 71.4 g CaCO₃
Let's remember the basic distance formula: d = vt As we know, the distance for both flights is 1200 km. 1200 = v₁t₁ 1200 = v₂t₂ The airplane cruises at 880 km/h with AND against a 90 km/h wind. 1200 = (880 - 90)t₁ 1200 = (880 + 90)t₂ From
You should not guess all the time. Even a quick google search can verify your answer.
Yes, Skylar, even question 4.
I agree with your answers.
For question 1, it would be both B and C. Force due to gravity is given by the equation F = Gm₁m₂/d² Both mass and distance affect gravity.
d = vt + at²/2 d = 0(4.1) + (-9.8)(4.1)²/2 d = -82 m It is negative because this is the distance from ground level. In this case, the negative only gives its direction. Therefore, the answer is 82 m.
Besides the typo of not capitalizing the "V" in Veronica's name, A is grammatically correct.
λ = c/f λ = (3e8)/(1.1e6) λ = 2.7e2 m
n = MV n = (0.250 M)(0.750 L) = 0.1875 mol m = n * MM m = 0.1875 mol * 142.04 g/mol m = 27 g
Chemical Formula: FeCl₂ * H₂O 55.85 + 2(35.45) + 2(1.01) + 16.00 = 144.77 g/mol
Partial pressure does not change. Partial Pressure of oxygen gas = 3.3 atm
I have to disagree with both of your answers. After winning the Battle of Vicksburg, the Union gained control of the Mississippi River. Also, the Emancipation Proclamation did NOT guarantee slave protection NOR safe passage into the North. It formally
I assume you mean the Union naval blockade. In the beginning of the war, the Union's navy was not very effective. Ships could easily pass through the blockade; they became to be known as "blockade runners." However, over time, the Union blockade became
I also believe #2 is wrong. The Comp of 1850 dealt with 5 major probs: 1) Cali 2) Texas 3) Terr. from the Mex. Cession 4) Fugitive Slave Law 5) Slave trade in DC Results: 1) Cali became a free state 2) TX's borders became more defined 3) slavery in the
Drawing a diagonal from one corner of the square to the opposite creates two 45-45-90 triangles.
9 + 10 = 19 can't tell if this is a troll or actually innocent...
Method 1: tanθ = y/x tanθ = 25/35 θ = tan⁻¹(25/35) θ = 35.54º tan(35.54º) = h/10 h = 10 tan(35.54º) h = 7.14 ft Method 2: 25/35 = h/10 h = 25/35 * 10 h = 7.14 ft
@Andre1: 29/500 is not the exact answer, only an estimate. Scott asked for an "equivalent"
The distance traveled does not affect the speed because it is time-dependent.
n = 0.05757... 100n = 5.75757... 100n = 5.75757... - n = 0.05757... ----------------- 99n = 5.7 n = 5.7/99 n = 19/330
d=vt Not sure what this is asking. It travels 60 km, at (80/3) km/hr for 2.25 hrs.
a = (vf - vi)/t a = (0 - 24)/9 a = -(8/3) m/s² d = vt + at²/2 d = (24)(9) + (-8/3)(9)²/2 d = 108 m
Find Slope: m = (2 - -3)/(-5 - 3) = -5/8 Plug one of the points in Point-Slope Equation: y - y₁ = m (x - x₁) y - 2 = -5/8 (x + 5) Rearrange the equation to make it in Standard Form: y - 2 = -5/8 (x + 5) y - 2 = -5x/8 - 25/8 8y - 16 = -5x - 25 5x + 8y =
x = 5 y = 12 therefore, r = √(12² + 5²) = 13 recall that cosθ = x/r therefore... cosθ = 5/13
Whoops, in the last line, I meant " N(1975) " and not " N(1750) "
I believe you posted this question awhile ago. Anyway, you should get that N(1975) = 4,317,183,977 How? Use the equation for linear interpolation: y = y₀ + (y₁ - y₀) [ (x - x₀)/(x₁ - x₀) ] Putting it into context... N(1750) = A + (B - A)[(1975
The burning of a hydrocarbon will yield carbon dioxide and water. C₂H₄ + 3 O₂ --> 2 CO₂ + 2 H₂O From the balanced equation, 1 mol of C₂H₄ will produce 2 mol of CO₂. I'm not sure what to do besides looking up ΔH for the reaction.
110,000 (0.18 + 0.21 + 0.13) = $57,200
N(1975) = 4,317,183,977
