Friday

April 18, 2014

April 18, 2014

Total # Posts: 19

**physics question**

find the force exerted by proton and the electron in a hydrogen atom they are 5.0 X 10^-19 coulomb

**physics coulombs **

find the force exerted by proton and the electron in a hydrogen atom they are 5.0 X 10^-19 coulomb

**physics coulombs law**

a negative charge 5.0 X 10^-4 C exerts a repulstio force of 7.0 N .on second charge away 0.05 m away. what is the sign and magnitude of the second charge

**mathematics**

the base of isoceles triangle is 4/3 cm. the perimeter of the triangle is 4 2/15. what is the length either of the remaining equal size

**Mathematics**

Half of a third of x equals a fourth of y plus a fifth of y. If x = 27, what is the value of y?

**Math**

divide the expression by 12 first and then use the formula..

**Math**

m=-3/4 m=-4/3 easier to figure out the roots using the quadratic formula. {-b+\-[sqrt(b2-4ac)]}/2a (I hope you are aware of it). Before going and manually solving the eqn, its better to check if b2-4ac is positive or not.(if -ve, equation has imaginary roots).

**algebra**

This is a second grade problem, actually.. Substitute for n 7*n 7*7565

**math**

2a^2+9a+4=0 2a^2+a+8a+4=0 a(2a+1)+4(2a+1)=0 (2a+1)(a+4)=0 a=-1/2 and a=-4

**Math**

Yes it is equal.. The price has been increased by 70.6% and decreased by the same %.

**math**

48 2*24 then 2*2*12 then 2*2*2*6 then 2*2*2*2*3

**math**

X+2=5 X=5-2 X=3

**Math**

area of outer circle A1=Pi*16^2= 803.84 area of inner circle A2=Pi*14^2= 615.44 area of outer ring=A1-A2=188.4 cm

**MATH**

335 employees use daycare 130 employees do not use daycare 2/7 of the employees do not send their kids to daycare

**math**

part/whole = part/whole 120/X = 5/100 X=2400 troop sold 2400 cookies

**5th grade math**

Answer 0.04= 4*10power-2 Example for writing in exponential form..hope you get the idea..... 4=4*10power0 40=4*10power1 400=4*10power2 .. ... 0.4=4*10power-1 0.04=4*10power-2 0.004=4*10power-3 ... .....

**Math**

c=2 d=3 e=6 i=9 p=0 s=1

**Math**

a=7 e=8 g=9 p=1

**math**

lets start with the equation 2n(n+4) - 28 = (n+2)^2 using formula (a+b)^2=a^2+2ab+b^2 2n^2+8n-28=n^2+4n+32 simplyfying, n2+4n=32 Solving for n, we get n=4 So the even consecutive numbers are 4,6,and 8..... checking... 2(4*8)-28=36

Pages: **1**