Questions LLC
Login
or
Sign Up
Ask a New Question
Alex
Questions and answers by
Alex
, page 2
Questions (2,580)
How was it determined that a circle is 360 degrees and all angles of a triangle equal 180 degrees?
4 answers
853 views
How is farming in Africa and the Pacific Islands similar?
2 answers
1,149 views
Electron Transfer Theory
Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+
5 answers
2,513 views
On a dt graph if there is a curve from 1 decreasing to 1.2 in an interval does is the velocity and acceleration + or 9? And is
3 answers
287 views
Electron Transfer Theory
Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+
3 answers
873 views
My teacher gave me a box and told me to see how many I could fit in the class room without taking out the heater or the desk.
1 answer
360 views
1) A car traveling at 22m/s decelerates at a constant 1.5m/s^2. Calculate the time it takes to stop.
I first calculated the
2 answers
1,206 views
This is for oxidation numbers. I need to know how to show my work.
Ex: for NaClO, I have to find the oxidation number for Cl I
4 answers
414 views
d) 2Al(s) + Fe2O3(s) 2Fe(l) + Al2O3(s)
Oxidation 2Al(s) 2Al+ + 2e- Reduction Fe23+ + 3e- 2Fe(l) Oxidation numbers for
3 answers
4,955 views
PbO2(s) + Pb(s) + H2SO4(aq) PbSO4(s) + H2O(l)
Can anyone help me identify what the redox reactions are for this equation? I
4 answers
2,565 views
I found the charges on all of the following atoms and found out that Mn was reduced and C was oxidized.
CH3OH- + MnO4- ----> Mn2+
5 answers
515 views
Can you check these? And I need help on one.
Oxidation Number Method of Balancing Redox Reactions 1)Neutral Solution Sn^2+ +
1 answer
757 views
Can you check these? And I need help on one.
Oxidation Number Method of Balancing Redox Reactions 1)Neutral Solution Sn^2+ +
1 answer
675 views
The following equations represent spontaneous reactions. From this evidence, set up a table of relative strengths of oxidizing
4 answers
1,640 views
The following equations are intepretations of the evidence from the reactions of four metals with various cation solutions. Make
4 answers
639 views
Predict the most likely redox reaction and use the spontaneity rule to predict whether the reaction will occur spontaneously.
1.
2 answers
500 views
Simplify each expression
5j+j 6d-3d 2a+4b+b+5a 12y-y-7y 20+8s-14+2c+s
1 answer
359 views
Write chemical equations to represent the cathode, anode, and net cell reactions.
1) Cd | Cd(NO3)2 || Ag(NO3)2 | Ag Reduction at
5 answers
1,114 views
A semi- trailer truck (seen from back) of mass M is negotiating a right hand curve on a level highway, The constant speed of the
2 answers
497 views
1. A student wishes to set up an electrolytic cell to plate copper onto a belt buckle. Predict the length of time it will take
2 answers
798 views
What are some hardships faced by families during The Great Depression.
1 answer
469 views
2sin(x)cos(x)+cos(x)=0
I'm looking for exact value solutions in [0, 3π] So I need to find general solutions to solve the
7 answers
816 views
Am I right on this?
2sec^2(2x)-8=0 2sec^2(2x)=8 divide by 2 sec^2(2x)=4 find square root sec(2x)=2 Now, would this simply be
1 answer
404 views
Can someone start me off on these and please explain step by step how you got everything because I'm having difficulty
2 answers
1,132 views
Can someone start me off on these and please explain step by step how you got everything because I'm having difficulty
2 answers
606 views
What solid melts at 35 degrees celsius
2 answers
534 views
1. A kid was tobogganing but the warm sun melted the snow and he must now pull his 10kg toboggan on the muddy slope (coefficient
2 answers
505 views
A light rope passing over a frictionless pulley connects two objects. One object has a mass of 10kg. The tension in the rope is
1 answer
523 views
A light rope passing over a frictionless pulley connects two objects. One object has a mass of 10kg. The tension in the rope is
2 answers
571 views
A light rope passing over a frictionless pulley connects two objects. One object has a mass of 10kg. The tension in the rope is
2 answers
633 views
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move
1 answer
395 views
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move
1 answer
400 views
State the normal of a line that is parallel to 2x-4y+5
2 answers
535 views
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move
6 answers
470 views
I am really lost and confused!
Consider the lines r = (1,-1,1) + t(3,2,1) and r = (-2,-3,0) + u(1,2,3). a) Find their point of
2 answers
864 views
Thank you for the help!
"When I solved equations 2 and 3 I got u=0 and t=-1, giving me r = (-2,-3,0) in both r = ... equations."
1 answer
306 views
State th coordinates of two points on the following line
x=3-8t y=4t For one point I got (3,0). In the back of the book it says
1 answer
422 views
State a direction vector with integer components.
x = (1/3) + 2t, y = 3-(2/3)t State the integer components and name a point on
1 answer
429 views
Determine which pairs of lines are parallel or perpendicular.
x = 1-3t, y = 7+4t x = 2-4s, y = -3s L1: r = (1,7) + t(-3,4) L2: r
1 answer
505 views
Please help me correct and properly translate the following Spanish paragraph:
Ayer, vi a Martin Luther el sentarse encima de una
6 answers
678 views
Estuve trastornado tan cuando mi hermano pidió que el hombre polaco saliera de nuestra casa. Entonces fui abajo al sótano a
2 answers
983 views
Estuve trastornado tan cuando mi hermano pidió que el hombre polaco saliera de nuestra casa. Entonces fui abajo al sótano a
3 answers
513 views
What are a few significant differences between laboratory thermometers and clinical thermometers?
3 answers
556 views
I don't understand this. Can you do some examples?
One student had the following way of dividing fractions. First the student
3 answers
608 views
Someone please explain these!
The angle between two planes is defined as the angle between their normals. Determine the angle
4 answers
487 views
Someone please explain these!
The angle between two planes is defined as the angle between their normals. Determine the angle
2 answers
510 views
Someone please explain these!
The angle between two planes is defined as the angle between their normals. Determine the angle
1 answer
492 views
For corrosion resistance, a steel bolt is plated with nickel from a solution of nickel(II)sulfate. If 0.250 g of nickel produces
2 answers
630 views
A car bumper is plated with chromium using chromium(III) ions in solution. If a current of 54 A flows in the cell for 45 min 30
2 answers
691 views
An electroplating cell operates for 35 min with a current of 1,9 A. Calculate the amount, in mols, of electrons transferred.
1 answer
374 views
help, i'd like to know how to do this titration question:
for example: a 1g sample of naoh contaminated with na2co3 is titrated
3 answers
470 views
Neutral metal sphere A, of mass 0.10kg, hangs from an insulating wire 2.0m long. An identical metal sphere B, with charge -q is
3 answers
649 views
Neutral metal sphere A, of mass 0.10kg, hangs from an insulating wire 2.0m long. An identical metal sphere B, with charge -q is
1 answer
640 views
Describe how energy is transferred through the ecosystem.
4 answers
419 views
Can you help me with this question?
Find the temp for conversion of monoclinic sulfur to rhombic sulfur. This is the data
1 answer
327 views
Can someone help me with this question?
Find the temp for conversion of monoclinic sulfur to rhombic sulfur. This is the data
1 answer
346 views
A particle moves on a vertical line. Its position, s, in metres at t seconds is given by s(t) = t^3 - 9t^2 + 24t, t>0/
I found
3 answers
1,549 views
Neutral metal sphere A, of mass 0.10kg, hangs from an insulating wire 2.0m long. An identical metal sphere B, with charge -q is
4 answers
3,074 views
Original Question:
Neutral metal sphere A, of mass 0.10kg, hangs from an insulating wire 2.0m long. An identical metal sphere B,
1 answer
662 views
Original Question:
Neutral metal sphere A, of mass 0.10kg, hangs from an insulating wire 2.0m long. An identical metal sphere B,
1 answer
671 views
N2+3H2->2NH3
What volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia? (assume constant
3 answers
1,816 views
Suggest a cubic that would best approximate a sine wave (f(x) = sin(x)) over the interval 0 less than or equal to x less than or
1 answer
400 views
Suggest a cubic that would best approximate a sine wave (f(x) = sin(x)) over the interval 0 less than or equal to x less than or
1 answer
615 views
Describe the role of each of the following types of bonds in a polyamide:
a) covalent bonds
4 answers
552 views
What functional group(s) must be present in a monomer of a condensation reaction?
1 answer
468 views
How do you tell what part of speech a word is under classification. How do you tell how each word is used in the sentence under
2 answers
514 views
Can someone show me how to do an indefinate integral?
I have to evaluate this problem. x^2(3x-1)dx
1 answer
384 views
A 3.0kg air puck sliding at 4.0m/s collides with a 5.0kg puck. After the collision the 3.0kg puck is moving north at 1.0m/s
5 answers
952 views
3)
a) Calculate the unstretched length of a spring, which has a Hooke's constant of 40N/m and is 56cm long when supporting a
3 answers
1,031 views
6) If a flea has a mass of 2.0x10^2 micrograms jumps vertically to a height of 65mm and 75% of the energy comes from elastic
4 answers
687 views
Can someone explain how
r = sqrt(1+(c-3)^2) becomwa r = (c^2-6c+10)^1/2
1 answer
325 views
Let f(x) = -2/((5+3x)^4)
Determine f'(x) using the chain role. Can someone please do this step by step and explain?
1 answer
383 views
Let f(x) = sqrt(3x+15)
Find f'(x) The answer is 3/(2sqrt(3x+15) Can anyone who does this please explain step by step why you did
1 answer
413 views
Let y = u^3+6u, where u = 2x^4+3x^2-2
Find dy/dx. Also.. 2) Let f(x) = 1/sqrt(4x^2-x). Determine f'(x). 3) Let y =
1 answer
420 views
Calculate the change in momentum in each of the following situations and state the direction of the change in momentum.
a) A 4kg
2 answers
565 views
A perfectly (non-head on) elastic collision occurs between a 0.25kg object moving east at 4m/s and a stationary 0.3kg object.
2 answers
699 views
Can anyone explain how to use the chain rule and power rule together to find the first derivative and please do these examples.
f
3 answers
594 views
Calculate the change in momentum in each of the following situations and state the direction of the change in momentum.
a) A 4kg
2 answers
670 views
Calculate the change in momentum in each of the following situations and state the direction of the change in momentum.
a) A 4kg
3 answers
1,144 views
Use the following information to identify element A and come
pound B, then answer questions a and b. An empty glass container has
13 answers
684 views
What are four professions associated with designing and constructing a bridge?
I have Civil/Construction Engineer and Surveyor so
1 answer
447 views
I really need help on these questions because I have a test tomorrow and don't understand how to do them.
1) A wire of diameter
2 answers
727 views
2) A single slit diffraction pattern is created using light of wavelength 700nm and a slit which is 0.020mm wide.
a) What is the
2 answers
644 views
In the study of a double slit diffraction pattern it is noted that the 5th double slit nodal line corresponds exactly with the
2 answers
570 views
Can someone explain in really simple terms the difference between Sigma and Pi bonds?
2 answers
522 views
Why did the early people of the Americas need to find new food resources?
1 answer
358 views
What were the similarities and differences in the Mound Builders and Anasazi?.............and Thank You for the help. I forgot
2 answers
888 views
Find all three-digit even numbers N such that 693xN is a perfect square, that is, 693 x N = k2 where k is an interger.
4 answers
667 views
The parliament of the land of Archronia consists of two houses. The Parliament was elected in 1995 for a period of four years
5 answers
511 views
how do i do powers? ( ex:10 to the power of 3)
1 answer
278 views
How do McCain and Obama differ on key issues?
1 answer
352 views
Why is 1,399,411 smaller than 1,296,204?
1 answer
293 views
We have a crossword puzzle that asks, "What is a family of compounds that holds water?" We have a four-letter space for the
2 answers
477 views
Please could you tell me 5 facts about African music.
1 answer
444 views
How have you used the scientific process (unsystematic observation, building theories, and evaluating propositions) in your life
6 answers
649 views
Name the numerical coefficient, the variable and the constant term of each of these algebraic expressions.
1.3x + 2 2.5n 3.w + 3
3 answers
582 views
Y is the midpoint of line xz. Find the coordinates of the third point if z(2,8) and y(-1,6)
2 answers
487 views
J is the midpoint of Gk, H is the midpoint of GJ and I is the midpoint of Hj. Suppose GK=64. Find the measure of HJ
3 answers
1,907 views
On a cross-country journey the distance travelled at a given time by a wagon caravan is given by the equation:
p(t) = t^5 + 2t^3
1 answer
394 views
Given the function:
y = 2 - x - x^3 use limits to find the slope (and then the equation) of the tangent line at x =2.
1 answer
360 views
Pages
1
2
3
4
5
6
7
8
9
10