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physics
20cm/step 12 steps?. d = 20 * 12 = 240cm. = 2.40m. P = F * d/t = Mg * d/t. P = 750 * 2.4/5 = 360 J/s = 360 Watts.

Physics
70 -30 = 40g = Wt. of paraffin. V = 40g/(0.8g/cm^3) = 50cm^3 = Vol. of bottle. Mass = 30 + (50cm^3*1g/cm^3) = 80g When filled with water.

mechnical
1. V1 = 9000rev/min * 1min/60s * 6.28rad/rev = 942.5 rad/s. V2 = 5500rev/min * 1min/60s * 6.28rad/rev. = 576 rad/s. a. a = (V2-V1)/t

Physics pls help
M1V1 + M2V2 = 24 + 10i sqrt(24^2+10^2) = 26kg.m/s = Total momentum before collision = Total momentum AFTER collision.

physics
Correction: E = 0.039 Volts.

physics
E = L*di/dt = (9*10^-3)*(1.5-0.2)/0.3 = 4.33 Volts.

maths
Total = 390 cm. Red = X cm. White = x+40 cm. Blue = 3x cm. Purple = (x+40)/2 = 0.5x+20. x + (x+40) + 3x + (0.5x+20) = 390. 5.5x + 60 = 390, X = 60 = Red. Calculate the length of the other ribbons.

Math
6,4,2,1,5,3. 5,3,1,6,4,2. 4,2,1,6,5,3. 3,1,6,5,4,3. 2,1,6,5,4,3.

Math
6,5,4,3,2,1. 6,4,3,2,1,5. 6,3,2,1,5,4. 6,2,1,5,4,3. 6,1,5,4,3,2. 5,4,3,2,1,6. 4,3,2,1,6,5. 3,2,1,6,5,4. 2,1,6,5,4,3. 1,6,5,4,3,2.

Math
1. 1,2,3,4,5,6. 1,3,4,5,6,2. 1,4,5,6,2,3. 1,5,6,2,3,4. 1,6,2,3,4,5.

Math
A. False. B. True. C. False.

Math
R = PL/A. P = 1.68*10^-8 Ohm*m. L = 3.9 m. r = 1.1*10^-3/2 = 5.5*10^-4 m. A = pi*r^2 = 3.14*(5.5*10^-4)^2 = 9.5*10^-7 m^2. R = 1.68*10^(-8)*3.9/(9.5*10^(-7)) = 0.069 Ohms.

Algebra
Eq1: 3x-3y+6z = 15 Eq2:-3x-6y+3z = -3(times-3). sum: =9y+9z = -18, y + z = -2. Eq2: -5x-10y+5z = -55(times-5). Eq3: +5x-8y+13z = 19 Sum: -18y+18z =-36, y - z = 2. y + z = -2. y - z = +2. Sum: 2y = 0, y = 0. z = -2. Eq1: 3x-3y+6z = 15. 3x - 3*0 + 6(-2) = 15, 3x = 27, x = 9. ...

science
2. Their forces are equal and opposite. 3. Unbalanced forced.

physical sci
Water vapor.

math
2005, Jamal: 21 + 3 = 24 yrs. old. a. 2005, Malcolm: 24/3 = 8 yrs. old. b. 8-3 = 5 yrs. old.

physics
k = (M2-M1)/(L2-L1) = (30-20)/(16-14) = 5 g/cm. d = 20g * 1cm/5g = 4cm = Distance stretched. Lu = 14-4 = 10cm = Un-stretched length.

Math
A. 50gal/Load * 52Loads = 2600 Gal. = 347.6 Ft^3. Cost = 347.6Ft^3 * 7.64/100 = B. (17.2/7.48)FT^3/day * 365days = 839.3 Ft^3. Cost = 839.3Ft^3 * 7.64/100Ft^3 =

physics
Incomplete.

Math
24/4 = 6 meals/day.

maths
d = 24*(T+5/60) = 1.25*24*(T-4/60). 24T + 2 = 30T - 2, T = 4/6 = 2/3 h. d = 24*(2/3+5/60) = ?.

MATH
Correction:314/(314+211+197+2243+279+325) = 0.20 Quota = 0.20 * 64 = 12.81.

MATH
Quota = 314/(314+211+197+243+279+325) = 12.81.

math
Incomplete.

math
I = Po*r*t = 6400*(0.0853/360)*40 = $60.66. Effective rate = (60.66/6400) * 100% = 0.95%.

Trigonometry
This is a rt. triangle: A = 0.5b*h = 0.5*6*8 = 24 Ft^2.

Trigonometry
Tan 57.68 = 50/D. D = ?.

Trigonometry
Tan =

Trigonometry
Y = 67 in. X = 67/2 = 33.5 in. Tan A = Y/X = 67/33.5 = 2.0 A = 63.43o.

Math
F = 700*SIN15 = 181.2 Lbs.

Math
a/sin A = b/sin B. a/sin43 = 10/sin112, a = ?.

Math
V1 = V2*1.42, V1 = (V1-20)*1.42, V1 = 67.7 Mi/h. d = V1*T1 = 67.7mi/h * 1h = 67.7 m1.

Math
d = V1*T1 = V2*T2. V1 * 1 = V2*(60+25)/60, V1 = V2*1.4

science
M1*d1 = M2*d2. M2 = 40 * 2 = M2 * 3.2, M2 = 25kg = Girl's wt.

Physical Science
P = I^2 * R.

Geometry
Find AX in the diagram if CX bisects angle ACB. And then there's a diagram below with triangle ABC, where X is on line C, BC=45, AC=21, and BX=30.

MAth
Disregard the first 2 lines.

MAth
Absent: X days. Worked: 28-x days. $9100/($500/day) =

science
Ans: C.

algebra 2
I1 = 10^6. I2 = 10^2*10^6 = 10^8. db(increase) = 10*Log(I2/I1). db(increase) = 10*Log(10^8/10^6) = 20.

physics
2c. Correction: 0 = 20^2 - 10d, d = 40 m.

physics
1. 72km/h = 72000m/3600s = 20 m/s. 2a. V2 = V1 + a*t. 0 = 20 + a*4, a = -5 m/s^2 = deceleration. 2b. F = M*a = 1200 * (-5) = -6000 N. The negative sign means the force opposes the motion. 2c. V2^2 = V1^2 + 2a*d. 0 = 20 - 10d, d = 2m.

Math and science
On the moon : M*g = 300 N. M*(9.8/6) = 300, M * 1.63 = 300, M = 183.7kg. On earth: Wt. = M*g = 183.7 * 9.8 = Or, On earth: 6 * 300 = 1800 N.

mechanical principle
Circumference = pi*d = 3.14 * 0.4 = 1.26 m. 1. Va = 8rev/20s * 6.28rad/rev = 2.51 rad/s. 2. V = 8rev/20s * 1.26m/rev = 0.502 m/s. 3. Va = Vo + a*t. 2.51 = 0 + a*20, a = 0.126 rad/s^2. 4. V = Vo + a*t. 0.502 = 0 + a*20, a = 0.025 /s^2.

math
P = 2h + 2W = 2*5.5 + 2*1.5 =

Mathematics-Geomeotry PLEASE HELPPPPPP!!!!!!!
AL = 2(W*h) + 2(L*h) = 624cm^2. 2(13*13) + 2(L*13) = 624, 338 + 26L = 624, L = 11 m. 1. Assuming the ends are square, W = h = 13 m. As = 2(L*W) + 2(L*h) + 2(W*h). 2. V = L*W*h.

Mathematics-Geomeotry PLEASE HELPPPPPP!!!!!!!
Correction: 1. As = 2(L*W) + 2(L*h) + 2(W*h).

Mathematics-Geomeotry PLEASE HELPPPPPP!!!!!!!
AL = 2(L*h) = 624cm^2. 2(L*13) = 624, L = 24cm. Assuming the ends are square, W = h = 13 cm. 1. As = 2(L*W) + AL. Or As = 2(L*W) + 2(L*h). 2. V = L*W*h.

math
P = Po + Po*r*t. P = 10,000 + 10,0000*(0.0825/365)*197 = 10,000 + 445.27 = $10,445.27. 3rd Payment = 10,445.27 - 6000 = $4,445.27.

Physics
NOTE: My vol. calculation was not required.

Physics
Vb = L*W*h = 12 * 12 * 6 = 864 cm^3. = Vol. of the block. Db/Dw * h = 600/1000 * 6cm = 3.6 cm submerged.

Math
b. 214 Ft. needed.

Math
a. L = 26 + 2*15 = 56 Ft. W = 21 + 2*15 = 51 Ft. P = 2L + 2W = 2*56 + 2*51 = 214 Ft. = Perimeter. Answer: 56ft by 51ft, 214ft.

PHYSICS
A. V = Vo + g*Tr. 0 = 40 - 9.8Tr, Tr = 4.08s = Rise time or time to reach max. ht. B. hmax = ho + Vo*Tr + 0.5g*Tr^2. hmax = 70 + 40*4.08 - 4.9*(4.08)^2 = 151.7 m. above gnd. C. Tf = Tr = 4.08 s. = Fall time. D. V = Vo + g*Tf = 0 + 9.8*4.08 = 40 m/s. E. h = ho - 0.5g*Tf^2. 0 = ...

Math 11
Y = a(x-h)^2 + k. 8 = a(6-5)^2 - 1, 8 = a - 1, a = 9. Y = 9(x-5)^2 - 1.

Physics
Correction: a. M = D*V = 6.5g/cm^3 * (20cm)^3 = 52,000g = 52kg.

Physics
So, the actual density is 6.5 times density of water: D = 6.5 * 1g/cm^3 = 6.5g/cm^3. a. M = D*V = 0.5g/cm^3 * (20cm)^3 = 4000g = 4kg. b. M = D*V. V = M/D = 3000g/(6.5g/cm^3) = 462 cm^3.

Physics
Vo = 1000/500 * 100 = 200 Volts. Po = Vo*Io = 200 * 4 = 800 Watts.

Physics
Ps = Pp = 120 * 0.1 = 12 Watts.

physics
See previous post: Mon, 4-10-17, 1:07 PM.

physics
Fb = M*g = 0.5 * 9.8 = 4.9 N. = Force of block. d = 4.9N/800N * 1m = 0.006125 m. = 0.6125 cm.

physics
Radios and TV sets often use step-up transformers to increase the 120-volt line voltage. Step-up and step-down transformers are also used for impedance matching for maximum power transfer. For example, a step-down transformer would be used to match a high resistance source to ...

physics
The output voltage of a step-up transformer is greater than the input voltage. The output voltage of a step-down transformer is less than the input voltage. In each case, the input voltage is connected across the primary winding, and the output voltage is measured across the ...

physics
Do/Dw = 0.75. Do/1 = 0.75, Do = 0.75g/cm^3 = Density of the object. M*g = 48 N. M = 48/g = 48/9.8 = 4.90 kg. = 4900g = Wt. of object. Vo = 4900g/(0.75g/cm^3) = 6533.3 cm^3 = Vol. of object. 0.75 * 6533.3 = 4900 cm^3 immersed = Vol. of water displaced. 4900cm^3 * 1g/cm^3 = ...

PHYSICS HELP
b. V^2 = Vo^2 + 2g*hmax. 29^2 = 0 + 19.6*hmax, hmax = 42.9 m. = Max. ht. above gnd. ho + h1 = hmax. 31 + h1 = 42.9, h1 = 11.9 m. above the cliff. a. V^2 = Vo^2 + 2g*h1. 0 = Vo^2 -19.6*11.9, Vo^2 = 233.2, Vo = 15.3 m/s = Velocity at which the rock was released.

physics
d = r = 31.7m = Vertical distance traveled. V^2 = Vo^2 + 2g*d. V^2 = 0 + 19.6*31.7 = 621.32, V = 24.9 m/s.

Physics
V1 = 15m/s[45o E of N.] = 45o N. of E. V2 = 18m/s[5o N. of E.]. Vr = 15m/s[45o] + 18m/s[5o]. Vr = 15*Cos45+15*sin45 + 18*Cos5+18*sin5. Vr = (10.61+10.61i) + (17.93+1.57i) = 28.54 + 12.18i. Magnitude = sqrt(28.54^2 + 12.18^2) = Tan A = Y/X = 12.18/28.54 = 0.42887. A =

Algebra
My answer is B.

physics question
Fc = M*g = 100 * 9.8 = 980 N. a. Work/s = F*d/t = 980 * 16/20 = 784 J./s. = 784 Watts. b. Po = Work/s = 784 J/s. c. Efficiency = Po/Pi = 784Watts/1000Watts = 0.784 = 78.4%.

physics
a. V^2 = Vo^2 + 2a*d. 0 = 20^2 + 2a*100, a = -2 m/s^2. b. F = M*a = 1000*(-2) = -2,000 N. c. W = F*d = -2000 * 100 = -200,000 Joules.

physics
Idc = 2Ipk/pi. 0.6 = 2Ipk/3.14, 2Ipk = 1.88, Ipk = 0.94 mA.

physics
Idc = Imax/pi = (1.414*150)/3.14 = 67.5 uA.

physic
Imax = I1max - I2min. Imax = (79+0.03*100) - (31-0.1) = 82 - 30.9 = 51.1 mA. Imin = I1min - I2max. Imin = (79-0.03*100) - (31+0.1) = 76 - 31.1 = 44.9 mA.

Maths
F(x) = (4x+7) + (x^2-2x). F(x) = Y = x^2 + 2x + 7. X = -B/2A = -2/2 = -1. Y = (-1)^2 + 2(-1) + 7 = 6. Min. point: (x,y) = (-1,6).

Math
2nd side = X yds. 1st. side = x-5 yds. 3rd. side = (x-5)-2 = x-7 yds. X + (X-5) + (X-7) = 42. 3x - 12 = 42, X = 18 Yds. X-5 = 18-5 = 13 Yds. X- 7 = 18 - 7 = 11 Yds.

Math, slope
C = 5 + 0.75/0.5KM. C = 5 + 1.50/km Eq: C = 1.5x + 5. C = Cost. Slope = 1.5. X = Distance traveled. Y-Intercept = 5.

Calculus
Tan(A) = Y/X = -7/2 r^2 = X^2 + Y^2 = 2^2 + (-7)^2 = 53, r = sqrt(53). a. sin(A) = Y/r = (-7)/sqrt(53) = (-7)*sqrt(53)/53. b. Cos(A) = X/r = 2/sqrt(53) = 2*sqrt(53)/53. c. sec(A) = 1/Cos(A) = qrt(53)/2. d. csc(A) = sqrt(53)/(-7). e. cot(A) = 1/Tan(A) = 2//(-7). = - 2/7.

Calculus
V^2 = Vo^2 = 2a*d. 0 = Vo^2 - 32*200, Vo^2 = 6400, Vo = 80 Ft/s. Vo = 80FT/s * 1m1/5280Ft. * 3600s/h = 54.5 mi/h. = Initial velocity.

Physics 12
a. Fr = F1 + F2 = 360 + 360 = 720 N. b. Fr = 360[0o] + 360[60o]. Fr = 360 + (180+312i) = 540 + 312i = 624N.[30o]. c. Fr = 360[0o] + 360[120o]. Fr = 360 + (-180+312i) = 180 + 312i = 360N.[60o]. d. Fr = 360[0o] + 360[180o]. Fr = 360 + (-360+0l) = 0.

algebra
Incomplete.

physics
V^2 = Vo^2 + 2a*d. 1.12^2 = 0 + 2a*5.4, a = 0.116 m/s^2. M*g = 6.8*9.8 = 66.64 N. = Wt. of bats. = Normal force(Fn). Fk = u*Fn = 66.64u. Fe-Fk = M*a. 20-66.64u = 6.8*0.116 = 0.789, 66.64u = 20-0.789 = 19.2, u = 0.288.

math
u(8,-3), v(-3,-8). Tan A = (-8-(-3))/(-3-8) = -5/-11 = 0.45455, A = 24.4o. S. of W.

mechanics
M*a = -30. a = -30/M = -30/0.54 = -55.6 M/S^2. V = Vo + a*t = 15 - 55.6*0.25 = 1.11 m/s.

mechanics
V = Vo + a*t. 12 = 15 + a*0.25, a = -12 m/s^2. a. Fe = M*a = 1200*(-12). b. M1*V1 + M2*V2 = M1*V3 + M2*V4. 1200*15 + 800*10 = 1200*12 + 800V4, 18,000 + 8000 = 14,400 + 800V4, -14,400 + 26,000 = 800V4, 800V4 = 11,600, V4 = 14.5 m/s. = Velocity of the car.

Phyisics
Vs = Vo + 0.6m/s/Co. Vs = 340 + 0.6*127 = 416 m/s.

math
1. S = 5000. 2. S = 5000 + 1500 = 6500. 3. S = 6500 + 1500 = 8,000. 4. S = 8000 + 1500 = 9,500. S = 5000 + 5000*0.3*(n-1). Factor out 5000: Eq: S = 5000(1 + 0.3*(n-1)). 2. S = 5000(1+0.3*(2-1)) = 6500. 3. S = 5000(1+0.3*(3-1)) = 8000. 4. S = 5000(1+0.3*(4-1)) = 9500.

Physics
1-0.8 = 0.2 N. lost. M*g = 0.2, M = 0.2/9.8 = 0.0204 kg = 20.4 grams lost

Math Fractions
6cups * 8oz/cup = 48 oz. of sports drink concentrate. 48oz + 9*48oz. = 480 oz. 480oz./(128oz/gal) = 3.75 Gal.

Math
P = (Po*r*t)/(1-(1+r)^-t). Po = $20,300. r = 0.0975/12 = 0.008125/mo. t = 4yrs. * 12mo./yr. = 48 mo. P = (20,300*0.008125*48)/(1-1.008125^-48). P = 7917/(1-1.008125^(-48)), P = 7917/0.32187535 = $24,596.48. M.P. = P/48. = 24,596.48/48 = $512.43.

Physics
A. V2^2 = V1^2 + 2g*h. V2^2 = 0 + 19.6*1.25 = 24.5, V2 = 4.95 m/s.

physics
Avg. Speed = (20+60+120)/3 = 66.67 km/h.

physical sciences
V2 = a*t = 4 * 40 = 160 m/s = Take-off speed. V2 = V1 + a*t. 160 = V1 + 4*40, V1 = 0.

Physics
Vr = 25 + 100i = 103m/s[76o].

Physics
output = 0.8 * Input =

Physics
V1 = 610rev/min * 6.28rad/rev * 1min/60s = 63.85 rad/s. V2 = V1 + a*t. = 63.85 + 5.9*3.2 = 82.73 m/s.

Math
kids ticket = $X each. Adult tickets = $2X each. 9x + 2*2x = 72. X = ?.

math
Width = X ft. Length = 2x+3 Ft. A = L*W = (2x+3)x = 65. 2x^2+3x = 65, 2x^2 + 3x - 65 = 0, Use Quadratic Formula: X = (-3 +- sqrt(9 + 520))/4 X = (-3 +- 23)/4 = 5, and -6.5. X = 5 Ft. = Width. Length = 2*5 + 3 = 13 Ft. P = 2L + 2W.

physics
F = M*g = 0.50 * 9.8 = 4.9 N. X = (1m/175N)*4.9N. + (1m/270N)*4.9N = 0.028 + 0.0181 = 0.0461 m.

Physicd
a. Fap = M*a. 10 = 2a, a = 5 m/s^2. b. V = Vo + a*t = 10 + 5*5 = 35 m/s.

MATH
d = 15mi/h*(40/60)h + 10mi/h*(20/60)h = 13.33 miles. - Total dist. traveled. r = 13.33mi/1h = 13.33 mi/h.

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