Saturday
November 29, 2014

Posts by Henry


Total # Posts: 9,617

physical science
Conclusion: m1*V1 = m2*V2. 2*V1 = 1*V2 V2 = 2V1
October 6, 2014

Physics
X = 25 m/s. Y = 200 m/s. Tan A = Y/X = 200/25 = 8.00 A = 82.9o Vp = Y/sin A = 200/sin82.9 = 202 m/s. = Velocity of the plane. d = 202m/s[82.9] * 3600s = 728,147 m. @ 82.9o
October 6, 2014

Physics
a. D=1.10km - 0.624i km + 1.09km[161.8o] X = 1.10 + 1.09*cos161.8 = 0.0645 km. = 64.5 m. Y = - 0.645 + 1.09*sin161.8 = -0.305 km. = -305 m. Tan A = Y/X = -305/64.5 = -4.72868 A = -78.06o CW = 78.06o S. of E. D = Y/Sin(-78.06) = -305/Sin(-78.06) = 312 m.[-78.06]. b. V = D/t = ...
October 5, 2014

physics
Xo = 3.76 m/s. 0.5g*t^2 = 6 m. 4.9t^2 = 6 t^2 = 1.22 Tf = 1.11 s.= Fall time. Dx = Xo*Tf = 3.76m/s * 1.11s. = 4.16 m.
October 5, 2014

Algebra 1 Check
2. 2*Sqrt(43x) = 14*Sqrt(43) Square both sides: 4*43x = 196*43 4x = 196 X = 49
October 5, 2014

Physics Resistance
R/4 Ohms/wire. Rb = 1/4 * R/4 = R/16 or 1/16R = Resistance of the bundle.
October 5, 2014

physics
EFF. = (Wo/Wi)*100% = (91/224)*100% = 40.6 %.
October 4, 2014

physics
Work = The change in kinetic energy. Work = KE2-KE1 = 0.5*m*V2^2-0.5*m*V1^2 = 0.5*550*3.2^2-0.5*550*1.5^2 = 2197 J.
October 4, 2014

Physics
Y^2 = Yo^2 + 2g*h = 0 Yo^2 - 19.6*1.1 = 0 Yo^2 = 21.56 Yo = 4.64 m/s. Vo = Yo/Sin A = 4.64/sin45 = 6.57 m/s @ 45o.
October 4, 2014

Science
a = F/m F = 420 N. m = 0.15 kg a in m/s^2
October 4, 2014

Intro to Physical Science
V = Vo = 6 m/s.
October 4, 2014

Physics
R1 = 61.5 Ohms. R2 = 146.6 Ohms. R3 = 16 Ohms. V = 13.6 Volts. a. Rt = R1*R2/(R1+R2) + R3 Rt = (61.5*146.6)/(61.5+146.6) + 16 = 59.32 Ohms. = Total resistance. I = V/Rt = 13.6/59.32 = 0.229 Amps. b. V2 = I*(R1*R2)/(R1+R2)=0.229 * 43.32 = 9.92 Volts. = Voltage across R2. P2 = ...
October 3, 2014

Physics
m*g = 36 * 9.8 = 352.8 N. KE+PE = 460 J. 185 + PE = 460 PE = 275 J. = mg*h mg*h = 275 352.8h = 275 h = 0.779 m.
October 3, 2014

physics
Fap = 340 N.[20o] Above the hor. Mass = 54 kg. u(k) = 0.4 m*g = 54 * 9.8 = 529.2 N. = Wt. of object. Fn = m*g+Fap*sin20=529.2 N. + 340*Sin20 = 645.5 N. = Normal = Force perpendicular to the surface. Fk = u*Fn = 0.4 * 645.5 = 258.2 N. a = (Fap*Cos20-Fk)/m = (319.5-258.2)/54= 1....
October 3, 2014

physics help
Based on the information given, 245 N. is too low. Please check all of the given INFO for accuracy.
October 3, 2014

physics
a. d = 0.5g*t^2 = 0.095 m. 4.9t^2 = 0.095 t^2 = 0.0194 Tf = 0.139 s. = Fall time or time in air. b. Dx = Xo*Tf = 20.6 Xo * 0.139 = 20.6 Xo = 148 m/s.
October 3, 2014

AC DC Circuit fundamentals
V = 12 Volts. R1 = 10k Ohms. R2 = 5k Ohms. I = V/(R1+R2) = 12/(10k+5k) = 0.8 mA. V1 = I*R1 = 0.8mA * 10k = 8 Volts. V2 = I*R2 = 0.8mA * 5k = 4 Volts.
October 2, 2014

physics
a = F/m = 7950/0.040 = 198,750 m/s^2. V^2 = Vo^2 + 2a*d Vo^2 = V^2 - 2a*d = 0 + 2*198750*0.011 = 4373 Vo = 66.1 m/s.
October 2, 2014

Physics
a. m*g = 0.6 * 9.8 = 5.88 N. = Wt. of the ball. Work = F*d = 5.88 * (6.1-1.2) = 28.8 J. b. PE = mg*h = 5.88 * 6.1 = 35.87 J. c. PE = mg*h = 5.88 * 1.2 = 7.06 J. d. (PEo-PEf) = 35.87 - 7.06 = 28.81 J. = The work done on the ball.
October 2, 2014

Physics
a. Box 1 V^2 = Vo^2+2g*h = 0 + 19.6*(4.8-1.2) = 70.56 V = 8.4 m/s. b. Box 2. V^2 = Vo^2+2g*h = 0 + 19.6*(4.8-1.2) = 70.56 V = 8.4 m/s. c. KE2/KE1 = 0.5m2*V^2/0.5m1*V^2 = 24*70.56/4.5*70.56 = 5.33 = m2/m1.
October 2, 2014

physics
h max = (V^2-Vo^2)/2g = (0-(20)^2/-19.6 = 20.41 m. V^2 = Vo^2 + 2g*h = 0 + 19.6*(20.41-5) = 302. V = 17.4 m/s
October 1, 2014

Physics
X = 1 km. Y = 1 km. Tan A = Y/X = 1 A = 45o D = X/Cos A = 1/Cos45 = 1.414 km[45o]
October 1, 2014

Physics
Fth = 1.250*10^7 N. = Force of thrust. Ra = 4.50*10^6 N. = Air resistance. m = 5.00*10^5 kg = Mass of the rocket. a = (Fth-Ra)/m
October 1, 2014

physics
Vo = 80km/h = 80000m/3600s = 22.22 m/s. V = 55km/h = 55000m/3600s = 15.28 m/s. Work = KE1-KE2 = o.5m*Vo^2-0.5m*V^2 = 935*22.22^2 - 935*15.28^2 = 461,636 - 218,302 = 243,334 J.
October 1, 2014

Physics
Xo = 39.0 m/s. h = 0.5g*t^2 = 16 m. 4.9t^2 = 16 t^2 = 3.27 Tf = 1.81 s. = Fall time. Dx = Xo*Tf = 39m/s * 1.81s = 70.5 m.
October 1, 2014

physics
m*g = 220kg * 9.8N/kg = 2156 n. = Wt. of the log. Fp = 2156*sin26.6 = 965.4 N. = Force parallel to the incline. Fn = 2156*Cos26.6 = 1928 N. = Normal. = Force perpendicular to the incline. Fk = u*Fn = 0.863 * 1928 = 1664 N. = Force of kinetic friction. Fex-Fp-Fk = m*a Fex-965.4...
October 1, 2014

physics
a1=(V-Vo)/t = (0.4-0.1)/5.5=0.055 m/s^2 a2 = (V-Vo)/t = (1.05-0)/15 = 0.07 m/s^2 F2=(a2/a1)*5N. = (0.07/0.055)*5N. = 6.36 N.
September 30, 2014

physics
What is a slug?
September 30, 2014

physics
a. Fn = (m1+m2)*g = (10+20)*9.8 = 294 N. b. Fn = m1*g = 10 * 9.8 = 98 N.
September 30, 2014

Physics
kg or kilograms.
September 30, 2014

Physics
m*g = 12kg * 9.8N/kg = 117.6 N. = Wt. of box. Fp = 117.6*Sin30 = 58.8 N. = Force parallel to the incline. Fn = 117.6*Cos30 = 101.8 N. = Normal = Force perpendicular to the incline. Fk = u*Fn = 0.29 * 101.8 = 29.53 N. = Force of kinetic friction. Fex-Fp-Fk = m*a Fex-58.8-29.53...
September 30, 2014

physics
A. h = 0.5g*t^2 = 0.7 m. 4.9t^2 = 0.7 t^2 = 0.1429 Tf = 0.378 s. = Fall time. B. Dx = Xo*Tf = 1 m Xo * 0.378 = 1 Xo = 1/0.378 = 2.65 m/s. = Initial hor. velocity.
September 29, 2014

physics
Tan5 = Y1/X = Y1/1.8 Y1 = 1.8*Tan5 = 0.157 km = Ht. of hill. Tan6.8 = (Y1+Y2)/X = (Y1+Y2)/1.8 Y1+Y2 = 1.8*Tan6.8 = 0.215 km Y2 = 0.215-Y1 = 0.215-0.157 = 0.058 km. = 58 m. = Ht. of tower.
September 29, 2014

physics
KE+PE = 520 J. 250 + PE = 520 PE = 520-250 = 270 J. mg*h = 270 h = 270/m*g = 270/(42*9.8) = 0.656 m.
September 29, 2014

physics
Case #1: Momentum = m1V1-m2V2 =8*25-3*0 = 200 Momentum = (m1+m2)V = 200 (8+3)*V = 200 V = 18.18 m/s Case #2: Momentum. = 3*25-8*0 = 75 (m1+m2)*V = 75 (8+3)*V = 75 V = 6.82 m/s
September 29, 2014

physics
m*g = 302kg * 9.8N/kg = 2960 N. = Wt. of motorcycle. Fp = 2960*sin24 = 1204 N. = Force parallel to the ramp. Fa = 235 N. = Force of air resistance. a = (Fap-Fp-Fa)/m = (2860-1204-235)/302= 4.71 m/s^2
September 29, 2014

physics
a = (V-Vo)/t V = 12 m/s Vo = 3.19 m/s. t = 5.4 s.
September 29, 2014

Physics
Rock #1: Vo1 = 7.70m/s[10o]. Downward. Yo1 = 7.70*sin10 = 1.34 m/s. h1 = Yo1*t + 0.5g*t^2 1.34*3.7 + 4.9*3.7^2 = 72.0 m Below top of the tower. Rock #2: Vo2 = 7.70m/s[50o], Up. Yo2 = 7.70*sin50 = 5.90 m/s h2 = Yo2*t + 0.5gt^2 h2 = 5.90*3.7 - 4.9*3.7^2 = -45.3 m. = 45.3 m. ...
September 28, 2014

Physics
V = 117km/h = 117000m/3600s. = 32.5 m/s. V^2 = Vo^2 + 2a*L = 32.5^2 0 + 4.8*L = 1056.25 L = 1056.25/4.8 = 220 m.
September 28, 2014

Physics
V = 117km/h = 117000m/3600s. = 32.5 m/s. V^2 = Vo^2 + 2a*L = 32.5^2 0 + 4.8*L = 1056.25 L = 1056.25/4.8 = 220 m. V = Vo + a*t = 32.5 m/s. 0 + 2.4*
September 28, 2014

physical
See previous post: Fri, 9-26-14, 12:49AM
September 28, 2014

friction
m*g = 10kg * 9.8N/kg = 98 N. = Wt. of the block. Fk = u*mg = 0.40 * 98 = 39.2 N. = Force of kinetic friction. a = Fk/Ms = 39.2/40 = 0.98 m/s^2.
September 28, 2014

physics
Fp = mg*sin31.7 = Force parallel to the Inclined plane = Scale reading. Fn = mg*Cos31.7 = Normal = Force perpendicular to the inclined plane.
September 28, 2014

Physics
a. d = 120 + (3/4)*120 = 120 + 90=210 m. r = d/t = 210m/30s. = 7 m/s. = Avg. speed. b. V = (120-90)/30 = 1 m/s. = Average velocity.
September 27, 2014

physics
a. m*g/6 = 100kg * (9.8/6)N/kg = 163.3 N. = Wt. on the moon.
September 27, 2014

physics
a = F/m = -5000/1500 = -3.33 m/s^2 V = Vo + a*t = 0 Vo = -a*t = -(-3.33)*5.6 = 18.67 m/s.
September 27, 2014

physics
Incomplete.
September 27, 2014

physics
Dx = 8.0 m. h = 20 m. Xo = ? m/s. h = 0.5g*t^2 = 20 m. 4.9t^2 = 20 t^2 = 4.082 Tf = 2.02 s. = Fall time. Dx = Xo*Tf = 8.0 m. Xo * 2.02 = 8 Xo = 3.96 m/s.
September 27, 2014

Physics
Correction: 44m/s * 0.7s = 30.8 m. Lead. d2 = d1 + 30.8 Vo*t + 0.5a*t^2 = 44t + 30.8 20t + 3t^2 = 44t + 30.8 3t^2 - 24t - 30.8 = 0 Use Quad. Formula. t = 9.125 s.
September 27, 2014

Physics
44m/s * 0.7s = 30.8 m. Lead. d2 = d1 + 14 m. Vo*t + 0.5a*t^2 = 44t + 14 20t + 3*t^2 = 44t + 14 3t^2 - 24t - 14 = 0 Use Quadratic formula. t = 8.55 s.
September 27, 2014

physics
h = 0.5g*t^2 = 0.9 m. 4.9*t^2 = 0.9 t^2 = 0.1837 Tf = 0.429 s. = Fall time. Tr = Tf = 0.429s. = Rise time. Y = Yo + g*Tr = 0 Yo = -g*Tr = 9.8 * 0.429 = 4.2 m/s. Yo = Vo*Sin53 = 4.2 Vo = 4.2/Sin53 = 5.26 m/s. = The required speed.
September 27, 2014

physics
Vo = 15m/s @ A Degrees. Xo = 15*Cos A. Yo = 15*Sin A. Dx = Xo*Tf = Xo * 6 = 78 m. Xo = 13 m/s. Xo = 15*Cos A = 13 m/s. 15*Cos A = 13 Cos A = 13/15 = 0.86667 A = 29.93o Yo = 15*Sin29.93 = 7.48 m/s. h = Yo*T + 0.5g*t^2 = 7.48*6 + 4.9*6^2 = 221.3 m.
September 27, 2014

Math
1. (F-g)(x) = (2x-5) - 4 = 2x - 5 - 4 = 2x - 9. 2. (F-g)(x) = 4 - (2x-1) = 4 - 2x + 1 = -2x + 5.
September 27, 2014

physics
V^2 = 2g*h = 19.6*5 = 98 V = 9.9 m/s. V^2 = Vo^2 + 2g*h = 0 Vo^2 - 19.6*1.61 = 0 Vo^2 = 31.556 Vo = 5.62 m/s a = (5.62-9.9)/0.027 = -158.5 m/s^2.
September 27, 2014

physics
The given frequencies appear to be too close together; and the answer is negative. Please check.
September 27, 2014

Science
Vo = 80km/h = 80000m/3600s. = 22.22 m/s. V = 13km/h = 13000m/3600s. = 3.61 m/s. a = (V-Vo)/t
September 27, 2014

Physics
a. V = Vo + g*t = 0 + 9.8*2.40 = 23.5 m/s. b. h = 0.5g*t^2 = 4.9*2.40^2 = 28.2 m.
September 26, 2014

physics
V^2 = Vo^2 + 2g*h Vo = 0 g = 3.7 m/s^2 h = 387 m. Solve for V
September 26, 2014

physics
m*g = 40kg * 9.8N/kg = 392 N. = Wt. of trolley. Fp = 392*sin20 = 134.1 N. = Force parallel to the hill. F-Fp = m*a F-134.1 = m*0 = 0 F = 134.1 N.
September 25, 2014

physics
Incomplete.
September 25, 2014

Math conversion
2.54cm = 1in 1cm = (1/2.54)in Cube both sides: 1cm^3 = (1/16.39)in^3 Multiply both sides by 21: 21cm^3 = 1.281 in^3
September 25, 2014

Physics
Series circuit: P = I^2 * R The bulb with the highest resistance will receive the most power; and will, therefore, be brighter. Parallel circuit: P = V * I The lowest resistance will receive the most power and will be brighter.
September 25, 2014

Trigonometry
Circumference = pi*D = 3.14 * 4.5 = 14.13 In. = 1.1775 Ft V=15mi/h * 5280Ft/mi * 6.28Rad/1.1775Ft * 1h/3600s. = 117.3 Rad/s.
September 25, 2014

Physics
Vo = 33.7m/s[24o] Xo = 33.7*Cos24 = 28 m/s. Yo = 33.7*Sin24 = 13.7 m/s. Tr = -Yo/g = -13.7/-9.8 = 1.40 s. = Rise time. h max = -Yo^2/2g = -(13.7^2)/-19.6 = 9.58 m. Above the bldg. 0.5g*t^2 = 9.58 + 110.8 = 120.4 m 4.9*t^2 = 120.4 t^2 = 24.57 Tf = 4.96 s. = Fall time. Dx = Xo*(...
September 24, 2014

Physics
The First Object: h = Vo*t + 0.5g*t^2 = 39 m. 54.9*t - 4.9*t^2 = 39 Use Quadratic formula. t = 0.762 s. The 2nd. Object: h = Vo*t + 0.5g*t^2 = 157.9-39 = 118.9 m Vo*0.762 + 4.9*0.762^2 = 118.9 0.762Vo + 2.845 = 118.9 0.762Vo = 118.9 - 2.845 = 116.05 Vo = 152.3 m/s.
September 24, 2014

Physics
a. X = 1300 m. Y = -880 m. Tan A = Y/X = -880/1300 = -0.67692 A = -34.1o CW = 325.9o CCW. D = X/Cos A = 1300/Cos(-34.1) = 1570 m. [325.9o]. D(1300, -880). b. T = 13min * 60s/min. = 780 s. Vavg = (1300+880)m/780s. = 2.79 m/s.
September 24, 2014

Physics
Momentum = M1*V1-M2*V2 = 20*80-5*50 = 1350. M1*V + M2*V = 1350 20*V + 5*V = 1350 25V = 1350 V = 54 m/s.
September 24, 2014

physics
V = Vo + a*t = 0 Vo -0.5*8 = 0 Vo = 4 m/s. Should the distance rolled be 16 m?
September 24, 2014

Math
See previous post: Tue, 5-12-09, 9:00 PM.
September 24, 2014

system of equations
X yrs. = John's age today. 5x yrs. = John's mom's age today. 7 years from now: x+7 = John's age. 5x+7 = John's mom's age. 5x+7 = 3(x+7) 5x+7 = 3x+21 2x = 14 X = 7 Yrs. = John's age today.
September 24, 2014

physics
Vo = 53.8m/s[42o] Xo = 53.8*Cos42 = 40. m/s Yo = 53.8*Sin42 = 36.00 m/s. a. Yo*t + 0.5g*t^2 = 840 m. -36*t + 4.9t^2 = 840 4.9t^2 - 36t - 840 = 0 Use Quadratic formula and get: t = 17.3 s. = Fall time. Dx = Xo*t = 40 * 17.3 = 692 m. b. Y^2 = Yo^2 + 2g*h = 36^2 + 19.6*840 = 17,...
September 24, 2014

physics
m*g = 7 * 9.8 = 68.6 N. = Wt. of book. Fp = 68.6*sin A = Force parallel to the plank. Fn = 68.6*Cos A = Force perpendicular to the plank. Fs = u*Fn = 0.4*68.6*Cos A Fp-Fs = m*a 68.6*sin A - 0.4*68.6*Cos A = m*0 = 0 68.6*Sin A = 0.4*68.6*Cos A Sin A = 0.4*Cos A Divide both ...
September 24, 2014

Physics
Q1. a = g = -9.8 m/s^2 = 9.8 m/s^2 Downward. Q2. h = 0.5g*t^2 = 4.9*3^2 = 44.1 m.
September 23, 2014

algebra
Multiply Eq1 by 1.25 and Eq2 by 0.25 and subtract: 0.3125x + 0.1875y = 3.125 0.3125x - 0.3125y = 1.875 Diff. : 0.5Y = 1.25 Y = 2.5 In Eq1, replace y with 2.5: 0.25x + 0.15*2.5 = 2.5 0.25x = 2.5 - 0.375 = 2.125 X = 8.5
September 23, 2014

Mathematics and investment
1. P = Po(1+r)^n P = $300,000 Po = Initial investment. r = (8%/4)/100% = 0.02 = Quarterly % rate expressed as a decimal. n = 4Comp/yr. * 3yrs. = 12 Compounding periods. P = Po*(1.02)^12 = 300,000 Po = 300,000/1.02^12 = $236,547.95 2. Same procedure as #1. 3. Po = 125,000 - ...
September 23, 2014

math
3(x+2)
September 22, 2014

physics
h1 = V*t + 0.5g*t^2 = 30 m. V*1 + 4.9*1^2 = 30 V = 30 - 4.9 = 25.1 m/s h = (V^2-Vo^2)/2g + h1 h = (25.1^2-0)/19.6 + 30 = 62.14 m. = Ht. of the peak.
September 22, 2014

Math
1/2 = 3/6 1/3 = 2/6 1 = 6/6 6/6 - 3/6 - 2/6 = 1/6 = Green 1/6 * M = 7 = Green M = 42 Marbles.
September 22, 2014

Trigonometry (Math)
Tan63.33 = Y1/X = 5/X X*Tan63.33 = 5 X = 5/Tan63.33 = 2.51 m = Distance from the point of observation. Tan40.17 = Y2/X = Y2/2.51 Y2 = 2.51*Tan40.17 = 2.12 m. h = Y1+Y2 = 5 + 2.12 = 7.12 m.
September 22, 2014

physics
Xo = 17 m/s. Yo = 15 m/s. a. Tr = -Yo/g = -15/-9.8 = 1.53 s. = Rise Time. b. h = 0.5g*Tr^2 = 4.9*1.53*2 = 11.47 m. c. T = Tr+Tf = 1.53 + 1.53 = 3.06 s. d. Dx = Xo*T = 17m/s. * 3.06 = 52.02 m.
September 22, 2014

physics
a. h = 0.5g*t^2 = 310 m. 4.9t^2 = 310 t^2 = 63.27 Tf = 7.95 s. = Fall time. b. c. X = Xo = 75 m/s. Remains constant. d. Y=Yo + g*Tf = 0 + 9.8*7.95=77.95 m/s e. Dx = Xo*Tf = 75m/s * 7.95s. = 596 m. Fom drop-off point.
September 22, 2014

college physics
A. h = 0.5g*t^2 = 0.90 m. 4.9t^2 = 0.90 t^2 = 0.184 t = 0.429 s. = Fall time. B. Dx = Xo*t = 1.6 m. Xo * 0.429 = 1.6 Xo = 3.73 m/s. = Hor. component. C. Y = Yo+g*t = 0 + 9.8*0.429 = 4.20 m/s = Ver. component. V^2 = Xo^2 + Y^2 = 3.73^2 + 4.2^2=31.55 V = 5.62 m/s. D. tan A = Y/...
September 22, 2014

Math
a. Tr = -Vo/g = -87/-32 = 2.72 s. = Rise time. h=-16*2.72^2 + 87*2.72 + 550=668.3 Ft. Above gnd. b. h = 0.5g*t^2 = 668.3 Ft. 16*t^2 = 668.3 t^2 = 41.77 Tf = 6.46 s. = Fall time. Tr + Tf = 2.72 + 6.46 = 9.18 s. To reach gnd.
September 22, 2014

Math
Y = x^2 + 8x - 11 h = Xv = -B/2A = -8/2 = -4. k = Yv = (-4)^2 + 8*(-4) - 11 = -27 V(h, k) = (-4,-27) Use the following points for graphing: (x, y). (-10,9) (-7,-18) (-6,-23) (-5,-26) V(-4,-27) (-3,-26) (-2,-23) (-1,-18) (2,9). X-intercepts: X1 will be negative. X2 will be ...
September 22, 2014

Physics
(245+r)/2 = 230 km/h 245 + r = 460 r = 460-245 = 215 km/h.
September 22, 2014

Physics
Dx = Vo^2*sin(2A)/g Dx = 30^2*sin(76.4)/9.8 = 89.3 m. Dx = Vo*cos38.2 * t = 89.3 30*cos38.2 * t = 89.3 t = 89.3/30*cos38.2 = 3.79 s. = Time in air. d = 0.5a*t^2 = 8 m. 0.5*2*t^2 = 8 t^2 = 8 t = 2.83 s. = Time needed to reach landing spot. 3.79-2.83 = 0.962 s. = Waiting time.
September 21, 2014

physics
Dx = Vo^2*sin(2A)/g = 33^2*sin33.6/9.8 = 65.13 m. 65.13m/2.74 = 23.8 or 23 Busses.
September 21, 2014

science
Correction: Tr = -Vo/g = -100/-10 = 10 s.=Rise time. h1 = Vo*Tr + 0.5g*Tr^2 h1 = 100*10 - 5*10^2=500 m. Above tower. Tf = 25 - 10 = 15 s. = Fall time. h1+h2 = 0.5g*Tf^2 = 5*15^2 = 1125 m. h1+h2 = 1125 500 + h2 = 1125 h2 = 1125-500 = 625 m.=Ht. of the tower.
September 21, 2014

science
Tr=-Vo/g = -100/-9.8=10.20 s.=Rise time. d = Vo*Tr + 0.5g*Tr^2 d = 100*10.20 - 4.9*10.20^2 = 510 m Above tower. Tf = 25 - 10.20 = 14.8 s. = Fall time. h+d = 0.5g*Tf^2 = 4.9*14.8^2 = 1073 m. h + d = 1073 h + 510 = 1073 h = 1073-510 = 563 m. = Ht. of the tower
September 21, 2014

Maths
Your problem will be easier to understand if you used punctuations and capital letters at the beginning of each sentence.
September 21, 2014

physics
Fx = 18-0.53N/m * 14m = 10.58 N. a = F/m = 10.58/6 = 1.76 m/s^2. V^2 = Vo^2 + 2a*d = 0 + 2*1.76*14 = 49.4 V = 7.03 m/s.
September 20, 2014

physics
See previous post: Sat, 9-20-14, 2:48 AM
September 20, 2014

nova
7a. V^2 = Vo^2 + 2g*h Vo^2 = V^2 - 2g*h = 25^2 + 19.6*15 = 919 Vo = 30.32 m/s. 7b. h = -(Vo^2)/2g = -(30.32^2)/-19.6 = 46.9 m. 8. a = F/m = 12/6 = 2 m/s^2 V^2 = Vo^2 + 2a*d Vo = 0, a = 2 m/s^2 d = 3 m. Solve for V.
September 20, 2014

physics
h = 78 * 6 = 468 m.
September 20, 2014

physics- HELP
See previous post: Fri, 9-19-14, 3:00 AM
September 19, 2014

Math
1.---3^1 = 3 cm. 2.---3^2 = 9 cm. 3.---3^3 = 27 cm. Y = 3^x. x = The # of hours. Y = The length. Y = 3^3 = 27 cm.
September 19, 2014

Pre-Calc
F(x) = x^2 - 8x + 15 15 = (-1)*(-15 = (-3)*(-5). Choose the pair of factors whose sum = B = -8. (X-3)(X-5) = 0 x-3 = 0 X = 3. x-5 = 0 X = 5.
September 19, 2014

math
Factors of 27y^3z = 1,3,5,9,27,y,y^2. Factors of 45x^2y = 1,3.5,9,15,45,x,y. CF = 1,3,5,9,y. GCF = 9.
September 19, 2014

physics
Dx = Vo^2*sin(2A)/g = 7.04 m Vo^2*sin(37.4)/9.8 = 7.04 Solve for Vo.
September 19, 2014

physics
a. Vo = 85.3m/s[45o] Xo = 85.3*Cos45 = 60.32 m/s. Yo = 85.3*sin45 = 60.32 m/s. h = 0.5g*t^2 = 587 m. 4.9t^2 = 587 t^2 = 119.8 Tf = 10.95 s. = Fall time. Dx = Xo * Tf = 60.32m/s * 10.95s=660 m. b. Y = Yo + g*Tf = 0 + 9.8*10.95 = 107.3 m/s. Tan A = Y/Xo = 107.3/60.32 = 1.77822 A...
September 19, 2014

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