Saturday

January 31, 2015

January 31, 2015

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**

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*

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