Saturday
January 31, 2015

Posts by bobpursley


Total # Posts: 37,295

Physics
distance to shuttle from earth center= radius earth+altitide
January 31, 2015

math -factor
nope, (3x-1/10)(3x+1/10)
January 30, 2015

Science
yes. RrxRr= RR, Rr, Rr,rr codominant.
January 30, 2015

Physic
average speed going thru is (350+190)/2 time=distance/avgvelocity
January 30, 2015

Physics
a=56/15 * t/10 a= dv/dt dv= 56/150 t dt v= INT dv= 28/150 t^2 from zero to 10 vf=2800/150 m/s
January 30, 2015

Constitutional
yes http://en.wikipedia.org/wiki/Peretz_v._United_States
January 30, 2015

Physics
frictional losses, going to heat. Motors typically are about only 30 percent efficient, and pulley about 90 percent.
January 30, 2015

physics
compression=force*k k= compression /force find k from the given. a) using k, find compression for that force. b) find force, given k and compression
January 29, 2015

Science
2c 3d 4 solid, or crystal
January 29, 2015

Science
c, d solid, or crystal
January 29, 2015

Organic chemistry
Well, it is somewhat complicated, depending if it is under acidic, alkaline, or neutral reaaction. You can get some wild colors with this reaction. The cyclohexene is oxidized, and what happens to the permanganate ion depends on the pH of the reaction. In simple terms of I ...
January 29, 2015

7th grade science
good
January 29, 2015

Physics 201
N=2.87Sin47.5 E=2.87 cos47.5 add the distances.
January 29, 2015

advanced algerbra
What is .85? it is 1-.15
January 29, 2015

Phsyics
acceleration= g*sin10 vf^2=vi^2+2d a solve for d average speed going down=(13+2.5 )/2 timedown=distance/avgspeed
January 29, 2015

URGENT PHYSICS
horizontal velocity=5/2.5=2m/s hf=hi+v't-4.9t^2 0=5+v'(2.5)-4.9(2.5)^2 solve for vertical velocity v' now, find arctan v'/2.5 is it greater orless than 45 deg.
January 29, 2015

college mathematics 1
g(x) is shifted upwards by 1
January 29, 2015

physics
t'=time to fall t"=time for sound to return after bottom t'+t"=8 depth=2*t'+1/2 g t'^2 depth=velocitysound*t" set them equal (same depth) 2*t'+1/2 g t'^2=velocitysound*t" 2*t'+1/2 g t'^2=velocitysound*(8-t') so solve for ...
January 29, 2015

Art
American !@#$%^& Willow along many streams was easy to find, and made fine canoes and baskets.
January 29, 2015

physics
vf^2=2ad solve for a. change vfinal to m/s
January 29, 2015

physics
vf=vi- 1.3 t solve for t.
January 29, 2015

physics
change 31min to seconds. d=v*t
January 29, 2015

physics
the distance traveled is the same, in the same time. dspeeder=20.1*t dscop=1/2 *2.65 t^2 set them equal, and solve for time t.
January 29, 2015

physics
150m/sec=2PI*radius/time time for one rev = 2PI*radius/150 then w=2pi/timeabove=2PI*150/(2PI*radius) = 150/radiusInMeters check my thinking.
January 29, 2015

chem
q=mcT c=q/mt=159/(8.4*21.1) so in units J/gC, your answer is wrong.
January 29, 2015

Chemistry
Think on them. I will check your answers. This is not rocket science.
January 29, 2015

Science!!
second law: Ever try to accelerate a car? third law: what hold you up when you stand on the floor?
January 29, 2015

Chemistry
Nuts to this. False. CONSTANTLY? hardly.
January 29, 2015

chemistry
One mole of carbon + 1/4 mole of O2? C+O2>>.CO2 that tells my you cannot get more than 1/8 mole of CO2.
January 29, 2015

Math
I wonder what sitting side by side means.
January 29, 2015

math
wouldn't this depend on what the fractions were?
January 29, 2015

math
24hrs/(6hrs/tank)=4 tanks=4(.54kg)
January 29, 2015

Physical science
It conducts electricity well, that is the main propery, otherwise it would not be used. The fact that it is lightweight is a bonus property. It is not strong, and ice causes issues, and cost is a second negative. The final property that is an advantage is corrosion resistance...
January 29, 2015

economics,english,mathslit,accounting,business,zul
I wonder what your question is.
January 29, 2015

Physics
Holy Mackerel. Wonder if the passengers are stapped in? 295km/hr Vf^2=vi^2+2ad 0=82^2-2a*205 a=82^2/410 almost 2 g's
January 28, 2015

physics
at the hightest point, it has only horizontal velocity...
January 28, 2015

Language Arts
utter: completely, unmitigated, without reservation Seals do get very loud when happy, especially at feeding time.
January 28, 2015

Math
charge=25 if x<7 charge=25+(x-6)*4 if x>7 which is correct. Now your first answer, 25 for x<=6 is the same as 25 for x<7 You you cannot have decimal portions of items, so it goes from six to 7. The second answer is just plain wrong. for instance, if one had 7 item...
January 28, 2015

Math, trignometry,Algebra
4. when x is zero, y=pi/2
January 28, 2015

physics
"a small object of 60kg)" Here in my part of the world, that is not a small object to be tided to as sting. I would love to have some of that string to go deep see fishing with.
January 28, 2015

physics
the force will now read: 60kg*(21/9.8)
January 28, 2015

Physics
nope, v=d/t is average velocity. Was there something you did not understand on how I told you to do it?
January 27, 2015

geometry
what is 20/sqrt2 ?
January 27, 2015

math
nope, I erred. 1, 5, 9, 13 each 4th bead is white.
January 27, 2015

math
1, 4, 7, 10, ....
January 27, 2015

science gases
I dont remember being in that class. What is in your notes?
January 27, 2015

Physics
what is cosine 45 * ( k*1.3n/1.1^2 -k*3.1n/1.1^2)
January 27, 2015

physics
ok,
January 27, 2015

physics
oops, 8.6 x some power of ten
January 27, 2015

physics
How do you get 28*300 to be 8.0 ? Generally, we get 7.6 times some power of ten.
January 27, 2015

physics
How can 300*28Pico be 2.8 times some power? It has to be 7.6 as the numerals.
January 27, 2015

physics
Isn't Capacity=coulombs/volt ? figure the coulombs of charge.
January 27, 2015

calculus 1
You need major help in algebra, not calculus. You may want to drop calculus, if the above work reflects your algebra ability. You made major errors in manipulation and solving that simple equation. S(t)=16t^2 find t when S=96 96=16^t^2 t^2=96/16 =6 t= sqrt(6)
January 27, 2015

Calculus II (Math)
what is the derivative of -50/7 e^-.7x ?
January 27, 2015

Physics
net torque= momentInertia*angular acceleration a. figure the moment of inertia for the wheel. b. Net torque= force*.0416/2-60.1*.476/2 c. you are given angular acceleration figure then, force.
January 27, 2015

Physics
see other post
January 27, 2015

Physics
vertical velociy= 16t so figure that at t=1.25sec then velocity=sqart(12^2 + vertVel^2) and you have it Now if you want to find the direction of the velocity, you have to figure that, I assume you just want speed.
January 27, 2015

Physics
Force=G*1*1/.1^2=100*6.67E-11 N That is kind of small, isn't it?
January 27, 2015

physics
a=force/masstotal masstotal=30/3=10kg. If they are wqual, thekn each is 5kg Tension in the first string is 30N, in the second, 15N (f=ma)
January 26, 2015

physics
Constant acceleration? V^2=2ad V= sqrt(2ad) when d is one half, then sqrt of .5 is .707 or 71 percent of final velocity when half way.
January 26, 2015

Physics - test question verification
oops, 3.0
January 26, 2015

Physics - test question verification
equilibrant=-sqrt(2.4^2+1.8^2) but if you have a keen eye, you recognize this as a 3,4,5 triangle, so the equilibrant is 30 (5*6), legs of triangle are 3*6, 4*6
January 26, 2015

Math
sinTheta=25/L solve for L
January 26, 2015

math
cost=.03*1.5*2PI*2.5*150,000
January 26, 2015

math
reduce by v, then the volume left if 4-v antifreeze conc*volume+solutionconc*volume=.5*4 1*v+.7(4-v)=2 solve for v
January 26, 2015

math
what is .85*5*250,000 ?
January 26, 2015

physics
it went twice the depth? 2d=1150*3.25 solve for d.
January 26, 2015

Physics
the momenta is the same in both direction. Newton's third law.
January 26, 2015

Physics
vertical: initial veloicity=17SinTheta time to top (where vertical velocity is zero) vtop=0=17sinTheta-9.8*time solve for thime
January 26, 2015

physics
Ignoring air friction ( I wish I could have done that when I was a long jumper in HSchool). hf=hi+ 1/2 g t^2 -2=0-4.9 t^2 solve for time in air, t. horizontal distance: 4.4=v*t solve for v.
January 26, 2015

Physics
Conservation of momentum Intial momentum=final momentum 26.3*21+13.3*12.2=13.3*23.7+26.2V solve for V
January 26, 2015

Physics
conservation of momentum M1*V1+M2*V2=(M1+M2)V solve for V
January 26, 2015

phyics
it will remain in its current state, unless an outside force acts on it.
January 26, 2015

Physics
conservation of momentum 10*11.9+64.3V=0 solve for V.
January 26, 2015

Physics
see the problem you posted under another name. Why do students do that?
January 26, 2015

Physics
2170*10.5E+3230V=(3230+2170)6E solve for V. Notice its direction has to be zero in N, or S direction.
January 26, 2015

Physics
force*time=.53*8.6 you know time, solve for force.
January 25, 2015

Physics
find initial vertical veloicty... vf=vi-9.8 t but vf=-vi in the vertical so vi=9.8*2.5/2 theta=arctan (vi/20.4)
January 25, 2015

physics
you know the distance both cars went in the same time d1=25*t d1-25=1/2 5(t^2) then 25t-25=2.5 t^2 solve for time t, then how fast is ... v=5t
January 25, 2015

Chemistry
EF? Empirical formula? But the percents do not add to 100, so what is the other substance?
January 25, 2015

physics
vf=vi-gt 18=vi-9.8(2.4) solve for vi using that vi, solve at time 5.4sec
January 25, 2015

Chemistry
moles=mass/atomicmass number atoms= avagradro's number * moles
January 25, 2015

Math
ho=59 h=0 0=-16t^2+59 t= 1/4 sqrt (59)
January 24, 2015

Add maths
one root (2q+sqrt(4q^2-8q-16))/2 other root (2q -sqrt(4q^2-8q-16))/2 but one root=3*other root or (2q+sqrt(4q^2-8q-16)=6q-3sqrt(4q^2-8q-16) 8q=-4sqrt( ) divide by 4, square both sides.. 4q^2=4q^2-8q-16) q=(-2) check my work. Typing is hard to do without making a mistake.
January 23, 2015

PED 212
let the ball bounce
January 23, 2015

Math
Diameter=circumference/PI No, not C.
January 23, 2015

physics
reaction=action (1.8+M).65=8*2.7 solve for M
January 23, 2015

physics
Impulse=changemomentum =.364*(Vf-Vi)=.364(22.4+19.7)
January 23, 2015

Math
area=PI (D/2)^2 yes D
January 23, 2015

Chemistry
I think your equation is really, really wrong. Try C6 H12 O6 + 6O2 -> 6CO2 +6H2O 10 mol O2? then 1/6 of 10 moles is moles of glucose
January 23, 2015

math
something is missing here.
January 23, 2015

PED 212
I would jump at answer b, if it were worded..."to advance knowledge on a variety of subjects". That is actually why we send kids to universities. Some think it is to get a batter job, but the truth is, it is to educate them, and advance knowledge.
January 23, 2015

Social Studies
A is the best answer of the four. IT is not a good answer
January 22, 2015

LAW
Only to Saint Peter.
January 22, 2015

science
acceleration=(vf-vi)/time
January 22, 2015

physics
f=(total mass)a total mass=masscrate+massbricks=1600/40 massbricks=40-mass crate, and at this point, the problem is flawed, the mass of brick cannot be negative, nor the weight (mass*g) be negative. Recheck your probleml.
January 22, 2015

chemistry
and the choices are ....
January 22, 2015

math
he had six friends, two each would have been 24 mangoes, however, he is short of 24 by 2, so he had left 22, and he then must have started with 27
January 22, 2015

Science
correct
January 22, 2015

physics
Momentum= 1*10=10Nt-sec the at rest mass has zero momentum
January 22, 2015

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Members