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Jake

Questions (1,018)

What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer
1. 1 answer
2. 2,373 views
A uniform rod of length L and mass m initially at rest is struck by a horizontal force F0 a distance x below the pivot O. The
1. 1 answer
2. 780 views
How much force was used to move a box 42m if 13,734 J of work was done on it?
1. 1 answer
2. 402 views
A gyroscope with rotational inertia 6.4 10-3 kg·m2 is precessing in a horizontal plane at 0.46 rad/s under the influence of a
1. 3 answers
2. 1,034 views
A rectangular cardboard poser is to have 150 sq ft in for printed matter. It is to have a 3inch margin at the top and bottom and
1. 1 answer
2. 1,336 views
explain why the equation x^(5)-3x+1=0 must have a solution with 0 < x <1
1. 1 answer
2. 340 views
Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator
1. 2 answers
2. 7,751 views
A rocket ascends from rest in a uniform gravitational field by ejecting exhaust with constant speed u.Assume that the rate at
1. 2 answers
2. 2,215 views
Use linear approximation to estimate sec^2(pi/4 + .025) Need help quickly please!! :)
1. 0 answers
2. 504 views
Samuel solved the equation h – 234 = 1,192 and found the solution to be h = 958. Is he correct? He is right I think because
1. 6 answers
2. 1,289 views
simplify log2(4x^2 2^x)
1. 1 answer
2. 363 views
In an election, Kate lost to Lee by 32 votes. Because the vote was so close, they decided to have a re-vote. All of Kate's
1. 1 answer
2. 998 views
What is the distance between the rectangular coordinates (1,16) and (10,4)?
1. 1 answer
2. 344 views
Write h(x) = 6x^4 - 2x^2 + 1 as a composition of two functions f and g
1. 1 answer
2. 428 views
A 50-question true-false exam is given. Each correct answer is worth 10 points. Consider an unprepared student who randomly
1. 2 answers
2. 1,140 views
Find the derivatives of the function f(y)= sinh(sinh(7y).
1. 3 answers
2. 529 views
When the price of X is $1 and the price of Y is $1 and income is I, Joe Panther spends $100 on good X. One day Joe is walking
1. 0 answers
2. 526 views
I have to create an ad based on my knowledge of 1610 o get more settlers to come to the new world
1. 2 answers
2. 406 views
find an equation of the line tangent to the equation at the given point.f(x)=5x^2 at x=10
1. 1 answer
2. 1,281 views
Mary needs to row her boat across a 100m wide river that is flowing to the east at a speed of 1.0m/s. Mary can row with a speed
1. 1 answer
2. 3,658 views
5) After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground,
1. 4 answers
2. 10,333 views
A soccer ball is kicked with an initial horizontal velocity of 19.0 m/s and an initial vertical velocity of 14.0 m/s6) How high
1. 1 answer
2. 1,342 views
The total toll charge for one car and five bicycles to cross a bridge is $7.50. The toll for a car is $1.50 more than for a
1. 2 answers
2. 1,246 views
Owing to an innovative rural public health program, infant mortality in Senegal, West Africa, is being reduced at a rate of 10%
1. 2 answers
2. 2,203 views
How many milliliter of conc. HNO3 would be necessary to prepare 500ml of 20% of HNO3 solution?
1. 3 answers
2. 974 views
I need a sentence using the word cytoplasm and I'm in 5th grade.
1. 3 answers
2. 529 views
Bat is flying 5m/s while chasing an insect that is flying in the same direction. The bat emits 40kHz chirp and hears a 40.4kHz
1. 1 answer
2. 1,633 views
Given sinx= -1/8 and tanx<0. find sin2x
1. 1 answer
2. 656 views
What is the pH of 115 mL of a 1.50 m solution of HNO2 that is titrated with a 1.50 M solution of LiOH at the equivelence point?
1. 0 answers
2. 476 views
Ag2S is an insoluable black solid. Would more solid dissolve, or precipitate once the following are added to the solution.1.
1. 1 answer
2. 646 views
Twenty people apply for seven jobs that are available at fly by night aircraft company12 are men and the rest are women. How
1. 1 answer
2. 478 views
Twenty people apply for seven jobs that are available at fly by night aircraft companyIn how many ways could such a group be
1. 1 answer
2. 462 views
The boundary between 2 plates moving together is calle _______.
1. 1 answer
2. 667 views
A solution of formic acid 0.20 M has a pH of 5.0. What is its Ka value?a) 5.0 x 10-10 b) 1.0 x 10-5 c) 5.0 x 10-5 d) 25
1. 1 answer
2. 721 views
Mols benzoic acid = 12.2g/122.12g = 0.0999Int. Concentration of Benzoic acid = 0.0999 mol/ 0.500L = 0.1998 M Ka = 6.3 x 10-5 =
1. 1 answer
2. 455 views
Calculate the pH of a solution prepared by dissolving 12.2 g of benzoic acid in enough water to produce a 500 mL solution.Ka =
1. 4 answers
2. 1,578 views
Can a solution of CrCl3 be stored in an aluminum container?
1. 1 answer
2. 731 views
Using the following spontaneous reactions, classify the 3 metals involved (Cr, Sn, Al) according to increasing reductant
1. 1 answer
2. 1,160 views
Which pair of ions will be most likely to react at standard state conditions?1. a) MnO4- and Sn2+ 2. b) Zn2+ and Cl- 3. c) I-
1. 1 answer
2. 1,485 views
If a piece of copper metal is dipped into a solution containing Cr3+ ions, what will happen? Explain with Ev values
1. 3 answers
2. 3,031 views
Pb(NO3)2(aq) 2 x 10-3 MNa2SO4(aq) 2 x 10-3 M Pb(NO3)2(aq) + NaSO4(aq) → PbSO4(s)+ 2NaNO3(aq) a) What are the concentrations of
1. 1 answer
2. 804 views
I'm trying to conjugate this in the past tensetú/presentarse would I conjugate it in past tense like this- (tú te presentaste)
1. 3 answers
2. 590 views
If we witness events taking place on the moon, where gravitation is weaker than on Earth, would we expect to see a gravitational
1. 3 answers
2. 490 views
The following reaction has a Delta Gvalue of 42.6 kJ/mol at 25oC: HB(aq) +H2O(l) --> H3O+(aq) +B-(aq) Calculate Ka for the acid
1. 2 answers
2. 3,379 views
Comparing Einstein's and Newton's theories of gravitation, can the correspondence principle be applied? and Why or Why not?a)Yes
1. 1 answer
2. 580 views
If we witness events taking place on the moon, where gravitation is weaker than on Earth, would we expect to see a gravitational
1. 0 answers
2. 477 views
A 100.0-mL sample of 0.250 M aniline (C6H5NH2) is titrated with 0.500 M HCl. What is the pH at theequivalence point?
1. 2 answers
2. 1,873 views
You take 326 g of a solid (melting point = 57.6oC, enthalpy of fusion = 346 J/g) and let it melt in 757g of water, and the water
1. 1 answer
2. 1,707 views
A passenger on an interplanetary express bus traveling at v = 0.94c takes a seven-minute catnap by his watch. How long does the
1. 1 answer
2. 2,142 views
A bus moving with speed 0.93c is 65 feet long according to its passengers and driver. What is its length from your vantage point
1. 1 answer
2. 410 views
Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200oC in a closed container, 1.1 atm of nitrogen gas
1. 4 answers
2. 1,488 views
Green light is emitted when electrons in a substance make a particular energy-level transition. If blue light were instead
1. 1 answer
2. 1,932 views
if you invest 500 dollars in a savings account that pays 8% interest per year, compounded quarterly, how much will you have in
1. 1 answer
2. 566 views
Given P(x) = x^3 - 3x^2 - 5x + 10a evaluate P9x) for each integer value of x from -3 through 5 b. Prove that 5 is an upper bound
1. 1 answer
2. 371 views
Two masses, m1=3kg and m2=2kg, are suspended with a massless rope over a pulley of mass M = 10kg. The pulley turns without
1. 3 answers
2. 3,143 views
Suppose vectors a and b are vectors such that a x b =(3,1,4). What is the cross product of twice of a with twice of b?
1. 0 answers
2. 599 views
An intravenous line provides a continuous flow of drug directly into the blood. Assuming no initial drug in the blood, the
1. 0 answers
2. 518 views
suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given
1. 1 answer
2. 807 views
Could someone please explain on how to do this question step-by-step. Thank you!A bolt is being loosened by a 40 cm wrench. The
1. 0 answers
2. 687 views
suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given
1. 1 answer
2. 995 views
suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given
1. 0 answers
2. 670 views
Use the algorithm for curve sketching to sketch the graph of each function.a) f(x) 4x^3+6x^2-24x-2 1. First to find intercepts
1. 3 answers
2. 1,531 views
Sketch the graph: (x+2)^2/25-(y+4)^2/25=1I don't understand this at all! When I tried graphing it I just had two lines going
1. 3 answers
2. 384 views
During the Columbian Exchange what diseases were brought from the new world to Europe?
1. 2 answers
2. 509 views
How much does it cost to operate a 100 W lamp continuously for 1 week if the power utility rate is 8/kWh? answer in $
1. 2 answers
2. 1,012 views
Two point charges are separated by 8 cm. The attractive force between them is 14 N. If the two charges attracting each other
1. 7 answers
2. 8,296 views
Which plane goes through the origin and is perpendicular to the line r=(2,-2,1) + s(2,3,-4), seR?a) 2x-2y+z=0 b) 2x+3y-4z=0 c)
1. 1 answer
2. 869 views
Are the points P(1,2), Q(7,3) and R(-2,1) o the line with vector equation r=(19,5) +s(6,1), SeR
1. 1 answer
2. 490 views
which pair of lines are perpendicular?a) 2x + 3y - 7=0, -3x - 2y + 2=0 b) 2x - 3y + 2=0, 5x - 7y + 2=0 c) -4x + y - 3=0, x +
1. 1 answer
2. 430 views
A rusted bolt requires 30 J of torque to be loosened. If only 40 N of force is applied to a wrench with which it makes a 90°
1. 0 answers
2. 703 views
Determine the value(s) of k such that the area of the parallelogram formed by vectors a = (k+1, 1,-2) and b =(k,3,0) is
1. 1 answer
2. 2,721 views
For which value(s) of k will the dot product of the vectors (k,2k-1, 3) and (k,5,-4) be 7?I did this so far, 2k-1=5 6/2 k=3
1. 1 answer
2. 962 views
Two force vectors act on an object and the dot product of the two vectors is 20. If both of the force vectors are doubled in
1. 1 answer
2. 639 views
I am bit of confused from this question. I have shown the work below and to subtract, am I supposed to be X2 - X1, Y2-Y1, Z2-Z1?
1. 4 answers
2. 627 views
A box of mass m=1.5 kg is attached to a spring with force constant k=12 and suspended on a frictionless incline that makes a 30
1. 1 answer
2. 765 views
I am bit of confused from this question. I have shown the work below and to subtract, am I supposed to be X2 - X1, Y2-Y1, Z2-Z1?
1. 0 answers
2. 536 views
1. Which of the following sets of vectors spans [r^2] ?a) {(1,1), (-2,-2)} b) {(1,1), (1,2)} c) {(1,2), (1/2,2)} d) {(-1,1),
1. 1 answer
2. 615 views
Point A=(1,3,4) and point B=(-2,2,0). Determine AB.a) (3,1,4) b) (-3,-1,-4) c) (-1,5,4) d) (1,5,4) I chose answer C. 2. A goes
1. 1 answer
2. 824 views
Vector D represents: URL is hereimgur dot com/AX4EN a) A+B b) A-B c) C+B d) A+C I chose answer A. Is that the correct answer?
1. 1 answer
2. 1,116 views
Use the substitution method to solve-x + 3y=24 5x +8y=-5
1. 2 answers
2. 1,097 views
|C|=5 and |D|=8. The angle formed by vectors C and D is 35 degrees, and the angle formed by vectors A and C is 40 degrees.
1. 1 answer
2. 593 views
Rectangular prism is defined by vectors (2,0,0)(0,9,5) and (0,0,3). Find the volume.I have done this so far, would anyone please
1. 2 answers
2. 893 views
If A=(1,2,4) and Vector A+B =(3,1,-2). What is B?
1. 2 answers
2. 316 views
Rectangle side is represented by (2,3) and (-6,4). Find the perimeter of rectangle.Is this correct? (-6-2), 4-3) sqrt(8^2+1^2)
1. 3 answers
2. 475 views
Rectangle side is represented by (2,3) and (-6,4). Find the perimeter of rectangle.Do I have to find the magnitude of (2,3) and
1. 1 answer
2. 400 views
Rectangle side is represented by (2,3) and (-6,4). Find the perimeter of rectangle.Could someone please help~
1. 2 answers
2. 358 views
Could someone explain to me how I can find the area/perimeter/volume of a rectangular prism if I am given R^3 points. For
1. 1 answer
2. 1,025 views
Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h.a) if bob swims upstream, what is his
1. 1 answer
2. 1,212 views
Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h.a) if bob swims upstream, what is his
1. 0 answers
2. 602 views
Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h.a) if bob swims upstream, what is his
1. 0 answers
2. 573 views
Why doesn't water undergo electrolysis?Why does Na2SO4 undergo electrolysis?
1. 1 answer
2. 459 views
Multiplying a vector by a scalar results in:a) a scalar b) a perpendicular vector c) a collinear vector c) a parallel scalar
1. 1 answer
2. 908 views
Sabrina and John cut a pie into 4 slices. Sabrina eats 2 slices. John eats the rest. What fraction names the part of the pie
1. 1 answer
2. 484 views
Among humans, increased interest in food intake normally occurs _____.only after the production of glucose in the liver can no
1. 2 answers
2. 1,815 views
A space explorer is 4.6 billion km away from a certain star, and observes that the gravitational force of attraction exerted on
1. 1 answer
2. 454 views
Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of
1. 1 answer
2. 858 views
Could someone help me setup an equation for this equation?--------------------------------- A city bus system carries 4000
1. 6 answers
2. 3,261 views
I need to find the statment of life in the call of the wild by jack london
1. 0 answers
2. 479 views
The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400).a) Determine the
1. 1 answer
2. 1,268 views
An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(1+t^2),t≥0.Determine the maximum and minimum
1. 2 answers
2. 742 views

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