Sunday
June 26, 2016

Posts by Damon

Total # Posts: 26,377

Math
2 w + 2 L = 154 L = 55 so 2 w + 110 = 154 2 w = 44 w = 22
January 14, 2016

science
If in SERIES the SAME CURRENT passes through all three and the voltages add up to the battery voltage. 10 i + 8 i + 5 i = V or 23 i = V i = V/23
January 14, 2016

Civics
Read Bill of RIGHTS
January 14, 2016

chemistry
4.5/13.9 = .323 not 3.32 x = Xo (1/2)^n log (x/Xo) = n log .5 = .323(-.301) = -.09723 x/Xo = 10^-.09723 = .799
January 14, 2016

physics
same magnetic field through each coil so voltage is in the ratio of the number of turns secondary/primary 60/120 = 1/2
January 14, 2016

Science
orbital motion is key, merry-go-round
January 14, 2016

Science
matter moves in accordance with Newton's laws (momentum is conserved, force is rate of change of momentum, action causes equal and opposite reaction) heat moves from hot to cold Electro magnetic energy follows Maxwell's equations.
January 14, 2016

Science
polar bears have long fur
January 14, 2016

Science
No,seeing as how I live beside the Gulf of Maine, it is increased flooding that worries me most immediately.
January 14, 2016

math
area of square = 32.5-7.5 = 25 so it is 5 by 5 = 25 like s = 5
January 14, 2016

Physics
4*10^-6 C*1 electron/(1.6*10^-19C) = (4/1.6) 10^13 electrons
January 14, 2016

math
4*8 = 32 3 * 32 = 96 ft^2
January 14, 2016

math
I see no picture so have no idea what your angles are.
January 13, 2016

Civics
Here in Massachusetts there are both state and local police forces so I suppose that is the right answer. However both the state and local governments provide funds for building schools. Here at present the state provides half and the city provides half the cost.
January 13, 2016

Physics - equal and opposite
Google Newton's Third Law.
January 13, 2016

PHYSICS
v at top = 0 v at two seconds down = Vi 0 = Vi - g t so Vi = 9.81 * 2 average speed during those two seconds is Vaverage = (0 + 2*9.81) /2 so average speed = g = 9.81 9.81 m/s * 2 s = 19.6 meters By the way that was quite a throw :)
January 13, 2016

Physics
v = Vi + a t stops so 0 = Vi + a (2.8) and -2500 = m a = 1350 a a = -1.85 m/s^2 0 = Vi - 1.85*2.8 Vi = 5.19 m/s
January 13, 2016

Geometry
same as the angle from the horizon to the top of the lighthouse from the ship tan T = 50/750 T = 3.81 degrees
January 13, 2016

SIERRA
watch your signs east defined as + initial v = +4.5 final v = -1.5 we want final - initial or (-1.5 - 4.5) impulse = change in momentum 90 (-1.5 - 4.5) = -90(6) = -540 kg m/s or 540 west F = rate of change of momentum = -540/1.2 = - 450 N or 450 N west
January 13, 2016

Physics
8.2 UP and .5(9.81 ) down = 3.295 Newtons up Work done =Force * 1.5 meters = 3.295*1.5 = 4.9425 Joules so (1/2) (.5) v^2 = 4.9425 v = 4.45 m/s
January 13, 2016

Been there - done that
http://www.jiskha.com/display.cgi?id=1452713165
January 13, 2016

Civics
http://worldpopulationreview.com/states/nevada-population/
January 13, 2016

civics
My son borrowed my chain saw :(
January 13, 2016

Math Help!
If the forces are in the same direction they add, yes
January 13, 2016

Math
yes yes
January 13, 2016

Maths
yes, yes
January 13, 2016

16 no
NOT MORE </= 30 You knew that
January 13, 2016

biology
all different acts of the same screen play. I do not think you should have a comma between continental and drift :)
January 13, 2016

math
volume = dimension^3 to double volume multiply dimensions by 2^(1/3) = 1.26 so 2.52 * 3.78 * 5.04 ================== check: 2*3*4 = 24 2.52 * 3.78 * 5.04 = 48.006 close enough to 48 :)
January 13, 2016

Math
do #7 more carefully
January 13, 2016

Math
5.5.4 + 0.2x =-1.4x + 8.6 2 --2 .2*** 20 ======================== 1.6 x = 3.2 16 x = 32 x = 2 I get
January 13, 2016

PHYSICS
a = change in v / change in t t1 = 1 Y1 = 2 V1 = 2 Dv = 2 t2 = 2 Y2 = 6 V2 = 4 Dv = 2 t3 = 3 Y3 = 12V3 = 6 Dv = 2 change in V = 2/1 = 2 m/s^2
January 13, 2016

Physics
fb = frequency heard then emmitted by blood particle fb = (c+v) f /c fl = frequency heard back at the source f receiver = fr = fb c/(c-v) so the result is: fr = f * (c+v)/(c-v) which is B (sort of, parenthesis missing)
January 13, 2016

Physics
You are welcome.
January 13, 2016

Physics
LOL, figured you knew how to do all that initial bullet speed = V that is what we want we know final speed is 4.7 conservation of momentum: .15 V = (.15+1.85)(4.7)
January 13, 2016

Physics
at the top of the circle: v^2/r = g v^2 = g r = 9.81 * .45 = 4.4145 so at top v = 2.1 m/s so Kinetic energy at the bottom must be enough to get up there at that speed (1/2) m v^2 = m g h + (1/2) m (4.4145) (1/2) v^2 = 9.81(0.90) + 2.207 v = 4.7 m/s at bottom after crash NOW do...
January 13, 2016

SCIENCEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
23. The number of protons in the nucleus of an atom is its ___. (1 point) ============================= HEY - I am happy to help a student who is stuck on something but I will not do your work for you. If you even read this question before posting it you would have answered ...
January 13, 2016

physics
F = M A = 1500 * 10 = 15,000 NEWTONS
January 13, 2016

Physics
17 min = 1020 seconds coulomb = amps * seconds so coulombs = .526 etc * 1020 or about 536 coulombs so answer = (536 / 1.602) 10^19
January 13, 2016

chemistry
(1/2)^ 6 = 1/64 so we are talking six half lives for A is 12 hours so one half life for A is 2 hours Now I will read the problem :) well half life of B is 3 hours 1/32 = 5 half lives 5 * 3 = 15 hours Not hard, just keep your wits about you and think ! (and check my arithmetic :)
January 13, 2016

physics
define + is up Draw a picture x = 0 at A , Fa up x = 80 at C , Fc up x = 50 at CG, mg =4*9.81=39.24 down so Fcg = -39.24 N sum of forces = 0 Fa + Fc + Fcg = 0 so Fa+Fc = 39.24 N now do moments about 0 for example Fc * 80 = 39.24 * 50 Fc = 24.5 N so Fa = 39.24 - 24.5 = 14.7 N
January 13, 2016

chemistry
Oh my. How many electrons? Nickel is 58.7 grams per mole or 6*10^23 atoms which here is 6*10^23 electros so 6 g * 6.022*10^23 electrons/58.7 g = .6155 * 10^23 electrons 1.602*10^-19 coulomb/electron so the product is .986 * 10^4 Coulombs a coulomb is an amp second so .986*10^4...
January 13, 2016

physics
.3 * 55 * 9.81
January 13, 2016

Algebra
3 x + 2 y = 13.5 2 x + 1 y = 8 =================== 3 x + 2 y = 13.5 4 x + 2 y = 16 -----------------subtract - x = - 2.5 x = 2.50 for hot dog (A yes) then 5 + y = 8 y = 3.00 for soda (B no ) C yes, that is what I did D makes no sense at all
January 13, 2016

Math Help!
1 A yes 2.yes 6/11 = 84/x 6 x = 11 * 84 x = 11*14 = 154
January 13, 2016

Math Help!
well I will do the last one 22/55 = 12/h multiply both sides by the LCD which is 55 h then (22/55) (55 h ) = (12/h)(55 h) or 22 h = 12 * 55 divide both sides by 11 2 h = 12 * 5 divide both sides by 2 h = 6 * 5 h = 30 ------------------- I have gone step by step to show you why...
January 13, 2016

Algebra 1
.793 is not very good, like at least above .8 but it is not bad and it might show that you are on the right track.
January 13, 2016

algebra
(1 branch/2 inches )72 inches = 36 branches
January 13, 2016

physics
d = (1/2) a t^2 100 = (1/2) a (100) so a = 2 m/s^2 F = m a = 32.5*2 = 65 N
January 13, 2016

Huh?
You bought one apple and sold ten? suspect you bought each at 10 and sold each at 11 1/10 = 0.1 0.1 * 100 = 10%
January 13, 2016

Physics
dv/dt = -6 t^3 v = -(6/4)t^4 + 5 when it stops, v = 0 t^4 = 3.333 seconds to stop t = 1.351 and t^5 = 4.504 x = -(6/20) t^5 + 5 t x = -(6/20)(4.504) + 6.755 = -1.3512 + 6.755 = 5.4 meters
January 13, 2016

Chemistry
heat to warm copper= Ccopper * 50 *(39.3-10) heat to cool water= 4.18 * 200 * (40-39.3) set them equal and solve for Ccopper
January 13, 2016

Physics
radius = Rearth cos 41.9 omega =2 pi/(24 hrs * 1 hr/3600 s) v = r omega
January 13, 2016

Math
9. percent equivalent to 3 is... Is it 0.03%? No 3 * 100 = 300 percent
January 13, 2016

Math NO !
Oh, is 4 1/4 as a percent - 4.25%? 4.25 * 100 = 425 % More than 4 times is more than 400 percent more: 4. fraction equivalent to 0.75% is... Is it 3/4? NO!!! .75/100 = .0075
January 13, 2016

math
for the same numerator the bigger the bottom, the smaller the result surely 1/4 is less than 1/2 :)
January 12, 2016

Physics
think lifting a barbell work in = Force up * distance up That is also the increase on potential energy m g h when you drop it that same value in Joules becomes (1/2) m v^2
January 12, 2016

Physics
Conservation of energy work done = increase of energy or work done = increase in kinetic energy + increase on potential energy
January 12, 2016

Math
photo area = 88 in^2 outside dimension = 8+2x by 11+2x so we want (2x+8)(2x+11) - 88 = 42 4 x^2 + 38 x - 42 = 0 2 x^2 + 19 x - 21 = 0 (2x + 21)(x-1) = 0 x = 1 inch
January 12, 2016

Math
LOL check your physics question
January 12, 2016

Math
silver back got 1 and 2 however 3 when you multiply by negative, you reverse the arrow 3. -5 p > - 30 5 p < 30 p < 6 which is b
January 12, 2016

Physics
F cos 38 = m a easy way is for constant acceleration v average = (Vi+Vf)/2 so v average = (0 + 2.2)/2 = 1.1 m/s so time = t = 3.4/1.1 = 3.09 s a = change in v / time = 2.2 / 3.09 = .712 m/s^2 so F cos 38 = 12 * .712 F = 10.8 Newtons
January 12, 2016

Math
3 (3 + 7/8) = 9 + 21/8 =11 5/8 15 4/8 - 11 5/8 = 14 12/8 - 11 5/8 = 3 7/8 He could get one more if it were not for the saw cerfs :) ------------------ check note 3 7/8 = 4 - 1/8 4 (4-1/8) = 16 - 4/8 = 15 1/2 sure enough
January 12, 2016

Math
1.12 = 8 x x = .14 or 14 % extra
January 12, 2016

Math
yes
January 12, 2016

math
2 v + 3 (v-10) = 220 5 v - 30 = 220 5 v = 250 v = 50
January 12, 2016

Math (Calculus - Limits)
(x-8)(x+b) = x^2 + 2 x + c - 8 b = c and -8 x + b x = 2 x or b = 10 so c = -80
January 12, 2016

Math
I mean 30 + 12 + 30 + 12
January 12, 2016

Math
so 20 + 12 + 30 + 12 :)
January 12, 2016

Math
1.6 x x + .6 x I guess :)
January 12, 2016

Physics help
loss of potential energy = gain in kinetic energy from 38.7 to 25.6: m g (38.7 - 25.6) = (1/2) m v^2 v = sqrt (2 * 9.81 * 13.1) = 16 m/s 12 = sqrt (2 * 9.81 * distance down) 144 = 19.62 d d = 7.34 distance of fall so 38.7 - 7.34 = 31.3 meters high at 12 m/s v = sqrt (2 *9.81* ...
January 12, 2016

physics
m = F/a = 48/3 = 16 kg
January 12, 2016

physics
both horizontal and down are 10 * sqrt2 /2 Newtons because sin 45 = cos 45 = sqrt2 /2
January 12, 2016

Math
xx 1 2 3 4 5 6 ------------- 1| 1 2 3 4 5 6 2| 2 4 6 8 10 12 3| 3 6 9 12 15 18 4| 4 8 12 16 20 24 5| 5 10 15 20 25 30 6| 6 12 18 24 30 36 well Leah's number must happen 3 times for every 2 of Sam's for example 2 happens twice (Sam) 4 happens 3 times (Leah) is there a ...
January 12, 2016

math
radius pond = 13 yds radius outside walk = 13+2 = 15 yds area of walk = pi (15^2-13^2) Got it now ?
January 12, 2016

math help please
5 (36-15)
January 12, 2016

Algebra
m + (m-15) = 44 ?? 2 m = 59 m = 29.5 s = m-15 = 14.5
January 12, 2016

math help please
20 + 5 + 20 + 5
January 12, 2016

physics
LOL - I guess unless the string breaks they better have the same acceleration force of m1 down slope = 3.7 g sin 30 = 1.85 g force of m2 the other way = 2.3 g net force = (2.3 -1.85)g = .45 * 9.81 = 4.41 N block 2 wins and heads straight down, block 1 heads up slope a = 4.41...
January 12, 2016

Algebra II
well, I suppose I would check -125^4/3 -125^1/3 = -5 then(-5)^4 = 625 so it looks like you are right to me
January 12, 2016

Calculus AB
Ah, so you have heard the words "mean value theorem" now let's see what the slope is from x = 1 to x = 2 y(2) = |(-2)(6)| = 12 y(1) = |(-5)(3)| = 15 so slope = -3/1 = -3 Mean value theorem says slope must be 3 at least once between = 1 and x = 2 lets look at ...
January 12, 2016

Calculus AB
Here you go http://www.sosmath.com/calculus/diff/der11/der11.html (mean value theorem)
January 12, 2016

Calculus AB
DRAW A GRAPH !!! somehow a smooth curve has to get from 4 at -3 back to 4 at +4 It could be a horizontal line, but that is a trivial case It could start up, but then would have to come down. SO HAS TO HAVE SLOPE of ZERO in here at least once if it started down, it has to come ...
January 12, 2016

us history. Plz help!
Well where is Louisiana and the Mississippi valley on your map ?
January 12, 2016

us history. Plz help!
3 is wrong. The United States did not exist when France was fighting England and us in the north east. I suspect they mean Louisiana purchase 5 wrong remember slavery etc at the time period 7 - I do not remember, assume you are right 9 I guess 11 no 12 - need for strong ...
January 12, 2016

math help
45 min + 30 min = 75 min = 1 hour and 15 min = 1.25 hr 9 - 1.25 = 7.75 which is 7:45 am
January 12, 2016

Math
2.5 gal (4 qt/gal) = 10 qt
January 12, 2016

math help
70/2
January 12, 2016

math
3 * 5.5 = 16.5 = 17
January 12, 2016

math
if n is 12 then n+6 is 18
January 12, 2016

Conversion
if it is 10 seconds I suspect 110 yards :) 1760 yd/mi 3600 s/h 110 yd/10 s (1 mi/1760 yd)(3600s/h) = 22.3 mi/h
January 12, 2016

PHYSICS 1
if your angles are math convention, counterclockwise from x axis and not compass angles from north then just use what Steve gave you for A Ax = 145 cos 190 Ay = 145 sin 190 etc
January 12, 2016

math
4.5 / 60
January 12, 2016

6 is right
You got one, enough already
January 12, 2016

Random selections?
4 C Hey have you just picked random answers?
January 12, 2016

Math
3D wrong, solution is y = 0 but what about 0 x = 0 in 2C ?
January 12, 2016

Math
2. Same mistake 5 x = + 40
January 12, 2016

Math
1) no 16 - 9 = +7
January 12, 2016

Please try to do these before asking
We are here to help, not to do your work for you. Try first
January 12, 2016

math
I just answered this http://www.jiskha.com/display.cgi?id=1452632926
January 12, 2016

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