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Complete and balance the reactionsA) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→
1. 1 answer
2. 1,608 views
A 275-gram ball bounces off a wall. The ball stays in a horizontal plane throughout the motion. The ball strikes the wall with a
1. 1 answer
2. 665 views
there exists a circle with chords. the chords are congruent. their corresponding arc measurements are 80 degrees and 2x+10 solve
1. 1 answer
2. 623 views
Free-energy change, ΔG∘, is related to cell potential, E∘, by the equationΔG∘=−nFE∘ where n is the number of moles
1. 1 answer
2. 1,531 views
Suppose a patient is given 140mg of I−131, a beta emitter with a half-life of 8.0 days.Assuming that none of the I−131 is
1. 0 answers
2. 567 views
Suppose a patient is given 140mg of I−131, a beta emitter with a half-life of 8.0 days.Assuming that none of the I−131 is
1. 0 answers
2. 1,042 views
A daredevil performs a stunt in which he jumps with his motorcycle from a horizontal cliff 10m high. What must the initial
1. 3 answers
2. 758 views
A little girl is standing on a cliff and throws a ball straight down at a speed of 5m/s towards the ground below. How far has it
1. 1 answer
2. 550 views
A ball leaves a table with an initial horizontal velocity of 2.4m/s. The height of the table is adjustable. In two runs, the
1. 1 answer
2. 570 views
Find the derivative of the function.y = integral from cosx to sinx (ln(8+3v)) dv lower limit = cosx upper limit = sinx y'(x) =
1. 1 answer
2. 1,607 views
It takes a force of 21,714lb to compress a coil spring assembly on a New York City Transit Authority subway car from its height
1. 1 answer
2. 2,015 views
A spring has a natural length of 10in. An 800lb force stretches the spring to 14in.A. Find the force constant B. How much work
1. 0 answers
2. 935 views
It took 1800J of work to stretch a spring from its natural length of 2m to a length of 5m. Find the spring's force constant.
1. 1 answer
2. 601 views
The following are about an infinite region in the 1st quadrant between y=e^-x and the x-axis.B)Find the volume of the solid
1. 1 answer
2. 580 views
The following are about an infinite region in the 1st quadrant between y=e^-x and the x-axis.A) Find the area of the region
1. 2 answers
2. 2,952 views
Limit as x approaches 0 of x(1-cosx)/t-sinx.Confused on how to get this answer.
1. 1 answer
2. 439 views
Determine the behavior of limitsA. Limit as x approaches 1 of: (log x)/((x-1)^2) B. Limit as x approaches infinity of:
1. 1 answer
2. 663 views
Evaluate limit as x approaches 0 of:csc^2(7x)tan(2x^2)
1. 2 answers
2. 620 views
As a standard voltaic cell runs, it "discharges" and the cell potential decreases with time. Explain.
1. 2 answers
2. 4,683 views
sketch the graph of the following. Show all your work and include all the important points and asymptotes.also find y' and y'' ?
1. 1 answer
2. 606 views
A "reference ring" with moment of inertia Ic rests on a solid disk torsion pendulum with a moment of inertia I0.a) What is the
1. 2 answers
2. 2,978 views
solve the following: 300e^.06x = 1500
1. 1 answer
2. 529 views
Evaluate: log base 5 379
1. 1 answer
2. 582 views
using Kb, for NH3 (from Appendix E), calculate Ka for the NH4+ ion.Kb for NH3 is 1.81 x 10^-5 Ka for NH4+ is Kw / Kb = 10^-14 /
1. 1 answer
2. 1,596 views
If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a
1. 1 answer
2. 556 views
A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which
1. 2 answers
2. 17,334 views
Consider the following.f(x) = 8x (square root of (x − x^2)) (a) Use a graph to find the absolute maximum and minimum values of
1. 1 answer
2. 746 views
Verify the given linear approximation ata = 0. Then determine the values of x for which the linear approximation is accurate to
1. 3 answers
2. 1,229 views
Two pucks with similar masses collide with each other over a nearly frictionless surface. At the moment of collision, a sharp
1. 1 answer
2. 584 views
Consider an isolated system consisting of two masses, each of which has a velocity vector in two dimensions. When these two
1. 1 answer
2. 751 views
A 4700 kg vehicle on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction
1. 1 answer
2. 693 views
Let r(x)= f(g(h(x))), where h(1)=4, g(4)=5, h'(1)=3 , g'(4)=5 and f'(5)=7. find r'(1).
1. 1 answer
2. 2,180 views
Use logarithmic differentiation to find the derivative of the function. show steps please!y=(e^-xcos^2(x))/(x^2+x+1)
1. 2 answers
2. 668 views
Find equations of both the tangent lines to the ellipse x^2 + 4y^2 = 36 that pass through the point (12, 3).smaller slope y=
1. 4 answers
2. 7,939 views
Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of
1. 0 answers
2. 936 views
Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of
1. 1 answer
2. 1,269 views
Consider the gravitational potential, kinetic, and total mechanical energies of a cart moving down an inclined ramp. (Also, let
1. 1 answer
2. 3,409 views
Find all points on the graph of the functionf(x) = 2 cos x + cos^2 x at which the tangent line is horizontal. (Use n as your
1. 1 answer
2. 7,171 views
What is an equation for the line that passes through points(4,-4) and (8-4)?
1. 1 answer
2. 403 views
Find a parabola with equationy = ax^2 + bx + c that has slope 6 at x = 1, slope −14 at x = −1, and passes through the point
1. 4 answers
2. 2,749 views
You have a total of $175 in $5 and $20 bills. The number of $5 bills you have is 3 more than 4 times the number of $20 bills.
1. 2 answers
2. 907 views
A dynamics cart with a friction pad is placed at the top of an inclined track and released from rest. The cart accelerates down
1. 1 answer
2. 1,844 views
A baseball player rounds third base and is heading for home when he is signaled by the base coach to slide. The player has a
1. 0 answers
2. 1,017 views
Let P(t) be the percentage of Americans under the age of 18 at time t. The table gives values of this function in census years
1. 0 answers
2. 1,022 views
I did some of them so can you help me with the rest.Consider the piecewise functon f(x) = (4x^2-3)/(3x^2-15) x<(-2) square root
1. 1 answer
2. 504 views
the smallest regulation golf ball has a volume of 2.48 cubic inches. if the diameter of the ball were increased by 10%, or a
1. 1 answer
2. 631 views
Hi, can someone please tell me whether or not I have choose the correct answer for these three questions.1. According to
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2. 626 views
Evaluate the integral:(cos(2-3x) - tan(5-3x))dx
1. 2 answers
2. 472 views
Assume that you take data on the projectile range for a variety of different launch angles A at a fixed initial velocity Vo. You
1. 3 answers
2. 4,297 views
For a given initial projectile speed, you observe that the projectile has a certain range R at a launch angle A = 30 degrees.
1. 2 answers
2. 3,214 views
For a given initial projectile speed Vo, calculate what launch angle A gives the longest range R. Show your work, don't just
1. 2 answers
2. 2,815 views
Make a predictive statement about the path dependence of accelerations due to gravity
1. 0 answers
2. 498 views
Calculate the time it would take for an object to fall through a linear height equal to the objects starting height, h for a 20
1. 1 answer
2. 517 views
An object begins at rest on a frictionless inclined plane at a linear distance of 2.0m from the base of the incline. If the
1. 1 answer
2. 1,330 views
A small washer is taped to a golf ball and the ball is hung from an electromagnet. When a trigger is activated the electromagnet
1. 4 answers
2. 2,931 views
An object at rest accelerates through a distance of 1.5 m at which point the instantaneous velocity of the object is 3.5m/s.
1. 1 answer
2. 1,064 views
One pump fills a tank two times as fast as another pump. If the pumps work together they fill the tank in 18 minutes. How long
1. 2 answers
2. 2,884 views
A coin box contained some twenty-cent and fifty-cent coins in the ratio 4 : 3. After 20 twenty-cent coins were taken out to
1. 1 answer
2. 1,090 views
Daniel's watering can holds 6L of water when full. He fills his watering can 3 times from the bucket and then the bucket is
1. 3 answers
2. 679 views
a dealer has 30 cars and trucks. If 2 more cars are delivered, the dealer will have 3 times as many cars as trucks. How many
1. 2 answers
2. 560 views
My son is in the fourth grade and is needing help with these math problems. Can someone please help him with these problems.1.
1. 2 answers
2. 362 views
Zach used to work at an independent record label. Negotiating could be exciting, but he was supposed to slant everything in the
1. 1 answer
2. 890 views
When the servers arrived, Jack gave them the information on today's specials. He talked enthusiastically about the fresh
1. 1 answer
2. 2,204 views
Write two fractions that are equivalent to each fraction.1. 2/5 2. 21/35
1. 8 answers
2. 377 views
Hi this is a mystery problem can you solve this?The best forger of all time was indeed a most brilliant artist and a man
1. 3 answers
2. 467 views
Look at the following puzzles and try to decipher the well known sayings1. Ban ana 2.nafish nafish 3.japmadean 4.issue issue
1. 3 answers
2. 1,064 views
Having trouble solving this...Write the equation if a line that goes through (6,-1/2) and has an x-intercept of 5x-2y=-20 I
1. 2 answers
2. 418 views
Ok so im looking for minimum avg power for a 38 kg boy to climb a 170 m building that takes 10.2 min include only work done
1. 1 answer
2. 474 views
Hi this is a rebus can you answer it?ECNALG
1. 2 answers
2. 789 views
Hi this is a rebus question, can you answer it?ECNALG
1. 0 answers
2. 411 views
Hi this a rebus, can you answer it?TEEXAMRM
1. 1 answer
2. 589 views
Hi this is a rebus, can you answer it?KNEE LIGHT
1. 2 answers
2. 632 views
According to the permanent income hypothesis, households will tend to react to a temporary tax cut by?A) assuming the new tax
1. 1 answer
2. 703 views
| t - 7 | + 3 > or = 4
1. 1 answer
2. 288 views
6/ln[x]find the derivative... im coming up with -6/x*(ln(x))^2 but it isn't accepting the answer what am i doing wrong?
1. 2 answers
2. 829 views
I hate theseY= (Square root of x) - 2 ________________________ (square root of x) + 2 Calculate dy/dx Please help, thank you
1. 1 answer
2. 358 views
why is it impossible to completely separate ethanol from water?
1. 2 answers
2. 554 views
why is it impossible to completely separate ethanol from water?
1. 1 answer
2. 325 views
9 is a very strange digit. Try to use four nines 9999 and normal operations plus minus multiply divide brackets etc, use 4 nines
1. 1 answer
2. 497 views
9 is a very strange digit. Try to use four nines 9999 and normal operations plus minus multiply divide brackets etc, use 4 nines
1. 1 answer
2. 433 views
A bookshelf has 5 shelves its made from wood that is 30 mm thick and the shelves are evenly spacedBookshelf is 2100mm high 600mm
1. 0 answers
2. 596 views
Can you use 4 fours 4444 and normal operations to arrive at 4?
1. 1 answer
2. 429 views
Can you use 4 nines 9999 And normal operations to arrive at 100
1. 1 answer
2. 603 views
Can you use 4 nines 9999 and normal operations to arrive at 20?
1. 1 answer
2. 467 views
The perimeter of a square is 12cm greater than that of another square. It's area exceeds the area of the other by 39cm^2. Find
1. 1 answer
2. 595 views
The perimeter of a square is 12 cm greater than that of another square. It's area exceeds the area of the other by 39 cm^2. Find
1. 1 answer
2. 532 views
Use two straight cuts to break the figure below into three pieces and re arrange them to from a square12345 are the squares 1
1. 2 answers
2. 539 views
Can you use two straight cuts to break the figure below into three pieces5 squares numbered 12345 5 123 4
1. 1 answer
2. 400 views
Two south poles or two north poles are called...
1. 1 answer
2. 700 views
Membership cost 900 and 20 per round. Different club charges 1500 and 14 per round with 15 rounds free. After how many rounds
1. 1 answer
2. 414 views
8/9 x 11/12=
1. 8 answers
2. 305 views
What should I invest now to have $15,000 in 12 years at a compounded monthly rate of 1.6%?
1. 2 answers
2. 510 views
To determine the compound amount of an investment of $10,000 with an interest rate of 6% compounded monthly after 4 years
1. 0 answers
2. 484 views
What would be the compound amount after 19 years on an investment of $42,000 with an 11% interest rate compounded annually?
1. 3 answers
2. 414 views
Using the Compound Interest Table, calculate the compound amount after 5 years for an investment of $7,700 at 6% interest
1. 2 answers
2. 1,181 views
A rope exerts a constant horizontal force of 203N pulling a 68-kg crate across the floor. The velocity of the crate is observed
1. 2 answers
2. 1,387 views
A rope exerts a constant horizontal force of 203N pulling a 68-kg crate across the floor. The velocity of the crate is observed
1. 1 answer
2. 655 views
Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a resistance of 0.835. What is the
1. 2 answers
2. 3,231 views
What type of conic section is given by the equation 4x^2+9y^2=36? What are its domain and range?
1. 4 answers
2. 3,662 views
5 Couples, having dinner before the prom are to be seated at a circular table. In how many ways can this occur if the seating
1. 0 answers
2. 467 views

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