03/23/24

Tricky interesting physics problem about magnetism
Can someone please help in finding a solution? I've never solved a problem like this one and it seems interesting but I can't get my head around it.The problem goes like this:The interacting... more
Follows • 1
Expert Answers •1

02/07/14

can you teach me tenses? all of them? please
all the tenses of past present and future with examples.
Follows • 4
Expert Answers •3

02/06/14

Chemistry problem about solutions.
Calculate how many cm^3 of a solution of perchloric acid 55.0% ( density = 1.47 g/mL) must be diluted with water in order to prepare a 0.5 L 0.3 M solution. How much water do we have to add in... more
Follows • 2
Expert Answers •1

02/05/14

Cameron rolls a number cube and spins a 5-part spinner, labeled 1, 2, 3, 4, and 5. What is the probability that he rolls a 5 or spins a 5?
Cameron rolls a number cube and spins a 5-part spinner, labeled 1, 2, 3, 4, and 5. What is the probability that he rolls 5 or spins a 5? Explain your answer
Follows • 4
Expert Answers •3

02/05/14

A variable star is one whose brightness alternately increases and decreases.
 A variable star is one whose brightness alternately increases and decreases. For one such star, the time between periods of maximum brightness is 5.4 days, the average brightness (or magnitude) of... more
Follows • 3
Expert Answers •2

02/03/14

mathematical induction
Use mathematical induction to show that change of at least 14c can be obtained using 3c and 8c coins. Show at least from 14c to 27c
Follows • 2
Expert Answers •1

02/03/14

Anti- Derivatives.
fot t less than or = 0, let v(t)= 6-4t be the velocity for a particle moving on a straight line. find the average speed and average velocity during the first 5 seconds  
Follows • 2
Expert Answers •1

02/03/14

Trigonometry
(i) Factorize the expression 2 sin x cos x - cos x + 4 sin x -2. (ii) Hence solve the equation 2 sin x cos x - 2=cos x - 4 sin x for -360°≤ x ≤ 360°
Follows • 2
Expert Answers •1

02/03/14

Trigonometry
Solve for 0°<x<180° for the following equation, 8 cosec 2x cot 2x=3
Follows • 2
Expert Answers •2

02/03/14

Logarithms
Given that a>b>1 and that 2 logab + 4 logba=9, find b in terms of a.   Ans: b=√a
Follows • 2
Expert Answers •1

02/03/14

Solve the equation (logarithms)
(i) Solve the equation log2(x3+1) - 2 log2x = log2(x2-x+1) -2 (ii) Hence solve the equation log2(x3+1) - log2x2 =log2(x2-x+1)-2     Ans: (i) 2+2√2        (ii) 2+2√2 , 2-2√2
Follows • 4
Expert Answers •2

02/01/14

Find the acceleration vector?
For any time t≥0, if the position of a particle in the xy-plane is given by x=t^2+1 and y=ln(2t+3), find the acceleration vector.    Answer: (2, -4/(2t+3)^2)   Please show all your work.
Follows • 3
Expert Answers •2

01/30/14

Find the limit?
Find the limit of (sin(x+h)-sin(x))/h as h approaches 0.   Answer: cos x   Please show all your work.
Follows • 3
Expert Answers •2

01/30/14

Integration by parts of Erf(x)
I need to integrate from 0-t. I am told to set u= Erf and u'= (2e^-x^2)/pi^1/2.  v' is 1 and v=x. i am also told that the answer is t Erf(t)+ ((e^-t^2)-1)/pi^1/2   how many times do I need to... more
Follows • 2
Expert Answers •1

01/29/14

POM TRI Triangles & Sequence RULE Question. Please help
Jo constructs triangular patterns using dots. Pattern 1 (has 3 dots forming a triangle) Pattern 2 (has 6 dots forming a larger triangle) Pattern 3 (has 10 dots forming an even larger triangle) The... more
Follows • 3
Expert Answers •2

01/29/14

What is the rule for the sequence/pattern (X) that produces the following numbers (Y): (1,3), (2,9), (3,30), (4,108), (5,408), etc.....?
In other words:    Pattern 1= 3 line segments (1 triangle) Pattern 2= 9 line segments (4 triangles) Pattern 3= 30 line segments (16 triangles) etc.......
Follows • 4
Expert Answers •3

01/28/14

Find its volume?
The base of a solid is the region enclosed by the graph of y=e^-x, the coordinate axes, and the line x=3. If all plane cross sections perpendicular to the x-axis are squares, find its... more
Follows • 3
Expert Answers •2

01/28/14

whats the momentum
When you are traveling in your car at highway speed,the momentum of a bug is suddenly changed as it splattersonto your windshield. Compared with the change inmomentum of the bug, by how much does... more
Follows • 2
Expert Answers •1

01/28/14

Can you reconcile this energy
. Place a small rubber ball on top of a basketball or soccerball and then drop them together. If vertical alignment nicelyremains as they fall to the floor, you’ll see that the small ballbounces... more
Follows • 2
Expert Answers •2

01/27/14

How do I write a series in sigma notation?
Consider the sum: (5)2 + (11)2 + (17)2 + ... + (18n - 1)2   How do I write this in sigma notation? The final term is really confusing me.  
Follows • 3
Expert Answers •3

01/27/14

Given the vectors below, determine the resultant and the equilibrant using trigonometry.
230.0 newtons @ 125 degrees175.0 newtons @ 60.0 degrees
Follows • 3
Expert Answers •2

01/26/14

A ball is launched at speed Vo with an angle to the horizontal. At its maximum height h, it has half the speed as when it was at half this height (h/2)
What is the angle it was launched at? Been stuck on this problem for quite some time now. Any guidance would be great, thanks! 
Follows • 2
Expert Answers •1

01/26/14

Please help me with this problem?
If f(0)=0, f'(0)= 1, f"(0)=0, and f'''(0)=2, then which of the following is the third order Taylor polynomial generated by f(x) at x=0?    a) 2x^3+x b) (1/3)x^3+(1/2)x c) (2/3)x^3+x d)... more
Follows • 2
Expert Answers •1

01/26/14

Find the ordered pair where the maximum value occurs for the equation C=12x-4y given the following constraints:
y>4 x>1 x+2y<16 y-x<5   Multiple choice: A.(8,4) B.(10,1) C.(1,4) D.(2,7)
Follows • 3
Expert Answers •2

01/26/14

Find the minimum value for the equatio c=-2x+y given the following constriants:
x>0 y>0 x+y<7 5x+2y<20     Mulitiple choice:   A.7 B.12 C.-8 D.-10
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.