# Posts by Henry

Total # Posts: 13,500

Physics
a. S = d/t = (25+25)/(10.01+10.22) = yds/s. b. S = d/t = 25/10.01 = yds/s.

math
15c + 12w = 13.20*100 = 1320. Eq1: 15c + 12w = 1320. Eq2: C + W = 100. Multiply both sides of Eq2 by (-15) and add the Eqs. Remember that C and W are in KGs.

math
N = 2bags * bBeans/bag = 2b. So N = 2b.

physics
h = 0.5g*Tf^2 = 703 m. 4.9Tf^2 = 703, Tf = Fall time = ?. Tr+Tf = Time in light. c. Range = X1*(Tr+Tf).

physics
V1= 120m/s[78o]. X1 = 120*Cos78 = 24.9 m/s. Y1 = 120*sin78 = 117.4 m/s. a. Y2^2 = Y1^2 + 2G*h. 0 = 117.4^2 - 19.6h, h = ?. b. V2 = V1 + g*Tr. 0 = 117.4 - 9.8Tr, Tr = 12 s. = Rise time.

Physics
a. Va = 6rev/4s * 6.28rad/rev = 9.42 rad/s. b. Circumference = pi*2r = 3.14*0.30m = 0.942 meters. V = 9.42rad/s. * 0.942m/6.28rad = m/s = Linear or Tangential velocity.

Science
3. B.700 N. (Your Mass does not change).

physics
V2 = V1 + a*t. V2 = -8 m/s, V1 = 30 m/s, t = 0.010 s, a = ?.

physics
a. I = (20*200)/(240) + 1500/240. I = 16.67A + 6.25A = 22.92A. b. Energy = ((10*0.20kW) + 1.50kW.)*5h = 17.5kWh.

math
a. Cost = \$93/mo. * 15mo. = \$1395. b. Carrying Charge = 1395-1250 = c. \$1250/(\$93/mo.) =

Algebra, Probability needed ASAP
See Related Questions: Thu, 5-7-15, 5:14 AM.

math
Cost = 45 + 0.21x = 66. X = ?.

speed
Tom's speed = X km/h. Jerry's speed = x-2 km/h. Tom: d = x * t. = 4x. Jerry: 4d/5 = (x-2)*t d = (1.25x - 2.5)t d = (1.25x - 2.5)4 d = 5x - 10. d = 4x = 5x - 10 4x = 5x - 10 X = 10 km/h. d = 10km/h * 4h = 40 km. = Length of the route.

Physics
Fo = M*g = 12 * 9.8 = 117.6 N. = Force of the object. Fp = 117.6*sln30 = 58.8 N. = Force parallel to the incline. Fn = 117.6*Cos30 = 101.8 N. = Normal force. Fs = u*Fn = 0.65 * 101.8 = 66.2 N. - Force of static friction.

Physics
a. t = d/V = 11*10^12m/(3*10^9m/s) = 3667 s. = 1.02 h. b. Wavelength = V/f = 3*10^8m/s/(8*10^9c/s) = 0.0375 m.

science
Disp. = 30i + 20 + 30*sqrt2[225o] Diep. = 30i + 20 + -30-30i = -10m = 10m West. For a different approach, see Related Questions: Sun, 7-29-12, 11:05 AM.

physical science
Load force = 600 N. Effort force = 100 N.

Geometry
A cone has diameter 12 and height 9. A cylinder is placed inside the cone so the base of the cylinder is concentric with the base of the cone and the upper base of the cylinder is contained in the surface of the cone. If the volume of the cone is nine times the volume of the ...

physics
See previous post: Mon., 5-8-17, 2:43 PM.

physics
a. Wavelength = 2 * 4m = 8 Meters. b. Wavelength = V/F1 = 8m. 340/F = 8, F1 = ?. F1 = Frequency of 1st harmonic. c. F2 = 2 * F1.

physics
Vs = 332 + 0.6*(-10) = 326 m/s = Velocity of sound. d = Vs * t/2 = 326 * 5/2 = 815 m.

physics
Vt = 180km/h = 180,000m/3600s = 50 m/s. = Velocity of the train. Vs = 332 + 0.6T = 332 + 0.6*19 = 343 m/s = Velocity of sound. Fr = ((Vs-Vr)/(Vs+Vt)) * Fh. Fr = ((343-0)/(343+50)) * 3500 = Fr = Frequency heard by the receiver(listener).

algebra
-11*sqrt(112) = -11*sqrt(16*7) = -11*4*sqrt(7) = -44*sqrt(7).

Physics 20
F = M*a, a = F/M = -1500/75.5 = -19.9 m/s^2.

maths
a. Area = L*W = 4.5 * 6 = 27m^2. b. Cost = 27m^2 * \$20/m^2 = \$540.

thermal physics
30mm = 0.030m. k = 2N./0.03m = 66.7 N/m. F = 66.7N/m * 0.035m - 2N. = 2.33 - 2 = 0.33 N. = Addition force.

Math
1. (4x^2 + 15x - 3) - (3x^2+5) = 4x^2 + 15x - 3 - 3x^2 - 5 = x^2 + 15x - 8. 2. -3f^2 + 4f - 3 + 8f^2 + 7f + 1 = 5f^2 + 11f - 2. 3. Ans: b. 4. Ans: b. 5. Ans: a. 6. Ans: -7. 7. 2^2 * 2^8 = 2^10. 8. (2.5*10^4)(4*10^3) = 10*10^7 = 1*10^8. 9. When multiplying, add the exponents: 5...

Physics
V1 = 115km/h = 115,000m/3600s = 31.94 m/s. V2 = 25km/h = 25,000/3600s = 6.94 m/s. V2^2 = V1^2 + 2a*d. d = 100 m., a = ?. Retardation is negative acceleration. Therefore, "a" will be negative.

Maths
1/3 = 3/9 = tomato juice. 2/3 * 2/3 = 4/9 = carrot juice. 9/9 - 3/9 - 4/9 = 2/9 = apple juice. (2/9)/(4/9) * 315mL = 1/2 * 315mL = 157.5 mL = apple juice.

Maths
Hasim counted his money. he gave 1/3 to his brother. he spent £12 on his sister. What he had left was half what he had at the beginning. how much did he give his brother?

Physics
Fk = u*Fn = 0.08*9.8M = 0.784M. -0.784M = M*a. a = -0.784 m/s^2. V^2 = Vo^2 + 2a*d. 0 = 6.7^2 - 2*0.784d, 1.568d = 44.89, d = 28.6 m.

pls help physics hw
Circumference = 2pi*r = 6.28 * 0.34m = 2.14m/rev. Period = 2.14m/rev/(39m/s) = NOTE: you cannot use cm AND meters. Use 0.34m instead of 34cm to make your units compatible.

Science
Correct!

Physics
a = (V2-V1)/T. V1 = 84m/6s = 14 m/s = Initial velocity. V2 = 180m/5s = 36 m/s. T = t1 + t2 = 6 + s = 11s.

Science
I = E/R. The resistance remains constant. Therefore, the current increases when you increase the voltage(E).

Physics
M*g = 100. M = 100/g = 100/9.8 = 10.2kg = Mass of the box. Fn = 100 - 10*sin60 = 91.34 N. = Normal force Fap-Fk = M*a. 10*Cos60-Fk = 10.2*0, Fk = 10*Cos60 = 5 N. = Force of kinetic friction.

discrete math
a. P = Po + Po*r*t. P = 8000 + 8000*0.1*10 = \$16,000 After 10 years. Amt. = \$16,000/10yrs. = \$1600/yr. b. Same procedure as part a. c. 1st. BAL. = (Po + I) - 2500. = (8000 + 0.2*8000) - 2500 = \$7100. 2nd. BAL. = (7100 + 0.2*7100)-2500 = \$6,020. 3rd. BAL = (6020 + 0.2*6020) - ...

Math
Mean = (76+73+78+75)/4 = 75.5 A quick way to calculate the mean is to take the difference between the largest and smallest number and divide it by 2; then add the results to the smallest number: (78-73)/2 = 2.5, 73 + 2.5 = 75.5.

physics
V = pi*r^2*h = 3.14*(1.05)^2*3.79 = 13.1m^3. Density = M/V = 13500kg/13.1m^3 = 1,028kg/m^3.

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 =

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.

Correction: 1. As = 2(L*W) + 2(L*h) + 2(W*h).

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.

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