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Robert

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A girl whirls a stone in a horizontal circle 1.5 m above the ground by means of a string 141 cm long. The string breaks, and the
1. 0 answers
2. 615 views
A sample of metallic element X, weighing 4.315g, combines with0.4810 L of Cl2 gas (at normal pressure and 20.0C) to form the
1. 1 answer
2. 1,403 views
A small steel ball bearing with a mass of 17.0 g is on a short compressed spring. When aimed vertically and suddenly released,
1. 1 answer
2. 760 views
If 3000ft/3 of air crossing an evaporator coil and is cooled from 75F to 55F, what would be the volume of air,in ft/3, exiting
1. 1 answer
2. 7,200 views
Use fraction strips to find each sum or difference. Simplify if possible.2 1/3 + 1 2/3 3 5/6 + 4 3/6 4 6/10+ 5 7/10 1 1/6 + 3
1. 4 answers
2. 2,196 views
Estimate each sum and difference.3 1/4 + 2 5/6 5 6/9 - 1 3/4 5 5/13 + 8 3/5 11 - 6 3/7 + 2 2/5
1. 1 answer
2. 508 views
Estimate each sum and difference.3 1/4 + 2 5/6 5 6/9 - 1 3/4 5 5/13 + 8 3/5 11 - 6 3/7 + 2 2/5
1. 1 answer
2. 453 views
How do the graphs of y=1/x and y=5/x+6 compare?
1. 1 answer
2. 625 views
I'm given two pictures looking down the alpha helices of a coiled coil dimer of alpha-keratin. I'm asked to identify three
1. 2 answers
2. 3,689 views
A 50.0 g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 17.0 m/s. A high-speed camera records this
1. 0 answers
2. 1,115 views
How do I solve this math problem. -10+ V_=-3. 2
1. 1 answer
2. 382 views
How do I solve this math problem. -2-10a=158
1. 1 answer
2. 868 views
How do I go about solving this math problem. -172=-1-9p
1. 1 answer
2. 974 views
I have a word problem with fractions.Anna estimated that her brother Nick ate about 1/3 of an apple pie, her brother Matt ate
1. 1 answer
2. 634 views
A football is kicked 65 m. If the ball is in the air for 4.3 s, find its horizontal velocity vx. Enter m/s as unit and use g =
1. 1 answer
2. 478 views
Harry and Hermione look from their balcony to a swimming pool below that is 12.0 m from the bottom of their building. They
1. 1 answer
2. 504 views
Brittany throws a slingshot pellet directly at a target that is far enough away to take 0.190 s to reach. How far below the
1. 0 answers
2. 480 views
A car sits in the parking lot. Above is a cargo plane, flying horizontally at 61 m/s. At the exact moment the plane is 182 m
1. 1 answer
2. 518 views
Bert is standing on a ladder picking apples in his father's orchard. As he pulls each apple off the tree, he tosses it into a
1. 1 answer
2. 2,222 views
A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2 and enter m/s as
1. 1 answer
2. 403 views
In her physics lab, Jessica rolls a 20-g marble down a ramp and off the table with a horizontal velocity of 1.10 m/s. The marble
1. 1 answer
2. 713 views
An aqueous solution of ethanol is 14.1M C2H5OH. The density of the solution is 0.853g/mL. What is molality of ethanol in the
1. 1 answer
2. 1,322 views
A restrictive clause is one thatA. usually occurs at the beginning of a sentence. B. limits the meaning of the word it
1. 1 answer
2. 721 views
Which of the following statements is not true about samples that can be treated as matched pairs data?I. Data collected on these
1. 1 answer
2. 1,208 views
The game of chuck-a-luck consists of rolling 3 dice. The player picks a number, 1, 2, 3, 4, 5, or 6. Winning and losing depends
1. 0 answers
2. 773 views
Find the probability of drawing a diamond card in each of the consecutive draws from a well shuffled pack of cards,if the card
1. 1 answer
2. 574 views
A shear force of 3.1 105 N is applied to an aluminum bar of length L = 19 cm, width w = 5.2 cm, and height h = 2.3 cm as shown
1. 0 answers
2. 412 views
What is a cubic polynomial function in standard form with zeros 1, –2, and 2?Use synthetic division to find P(3) for P(x) =
1. 2 answers
2. 2,185 views
Any number in the form of a+-bi , where a and b are real numbers and b not equal 0 is considered a pure imaginary number. TRUE
1. 11 answers
2. 14,002 views
What value completes the square for the expression? x2 + 14xUse the quadratic formula to solve the equation. x2 – 7x – 6 = 0
1. 1 answer
2. 913 views
Can you double check my answerThe lengths of the sides of a rectangular window have the ratio 1.6 to 1. The area of the window
1. 8 answers
2. 5,151 views
Solve the quadratic equation by completing the square. (-x^2 + 6x + 10 = 0)
1. 1 answer
2. 870 views
15. What is the solution of the linear-quadratic system of equations?{y = x^2 + 5x - 3} {y - x = 2}
1. 13 answers
2. 15,761 views
While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile's acceleration? How
1. 0 answers
2. 1,132 views
3. Identify the vertex and the axis of symmetry of the graph of the function y = 3(x + 2)2 – 3. (1 point)A- vertex: (2, –3);
1. 1 answer
2. 1,701 views
QUESTIONS (vvv)(1) Solve the system by subsitution 2x + y = -11 3 - 4y = 11 (2) Solve the system by elimination 2x + 6 = -12 5x
1. 1 answer
2. 1,381 views
22. The graph of g(x) is f(x) translated to the left 8 units and up 2 units. What is the function rule for g(x) given f(x) =
1. 0 answers
2. 615 views
21. A candle is 17 in. tall after burning for 3 hours. After 5 hours, it is 15 in. tall. Write a linear equation to model the
1. 3 answers
2. 2,568 views
4. If Cassandra bought 16 cotton blouses last year when her income was $40,000 and she buys 24 cotton blouses this year when her
1. 1 answer
2. 1,650 views
4a. In the market for hand-made guitars, when the price of guitars is $800, annual revenues are $640,000. When the price falls
1. 0 answers
2. 1,147 views
The producer of X is contemplating a price change and has asked for your advice. After some empirical investigation, you
1. 0 answers
2. 828 views
In the early 20th century, some scientists were reluctant to accept the conclusion that DNA could be the genetic material
1. 0 answers
2. 1,076 views
A bacterium that synthesizes an enzyme that neutralizes an environment toxin would probably use a(n) _____________ operon to
1. 1 answer
2. 438 views
The two waiters exchanged a look whose meaning was clear to me.what type of clause or phase is used?
1. 10 answers
2. 2,484 views
He will not allow the table to be moved.identify the Verbal in the sentence and type of verbal
1. 7 answers
2. 3,264 views
what type of clause or phrase is used in the sentence: we hit a snag while rowing to shore
1. 2 answers
2. 1,558 views
Average Growth Rate(2000-2009)ofChina - GDP: 10.9 Population: 0.8 Per Capita GDP: 10.1 Ethiopia - GDP: 7.5 Population: 2.8 Per
1. 2 answers
2. 1,979 views
What are the nouns and verbs in the sentence.Life is full of choices, so I must learn to make good ones.
1. 2 answers
2. 747 views
Acetylcholinesterase catalyzes the hydrolysis of the neurotransmitter acetylcholine:Acetylcholine + H2O  actetate + choline
1. 0 answers
2. 1,253 views
Solve the following system using Gauss's algorithm(a) x1 + 2x2 + 4x3 + 6x4 = 3 2x1 + x2 + 3x3 = -6 -2x1 + x2 + 6x3 + 4x4 = -11
1. 3 answers
2. 1,366 views
Staring from the pit, Helen made three laps around a circular track at 40 seconds per lap. She than made a 30-second pit stop
1. 0 answers
2. 789 views
Calculate the following integral and determine whether it's convergent, or divergent.integral at [-3,0] x dx / sqr(9 - x^2)
1. 1 answer
2. 460 views
Calculate the following integral:∫ dx / x(1 - √x)^2
1. 3 answers
2. 538 views
Calculate the following integral:∫ sec^4 (3x)/ tan^3 (3x) dx For this one, can I bring up the tan to tan^-3?
1. 2 answers
2. 1,432 views
Algebra Question: A team wins 15 of their first 20 games. If they win only half the time from now on, how many games will they
1. 1 answer
2. 470 views
Am I allowed to do this?for the integral of ∫ sec^4 (3x)/ tan^3 (3x) dx I change it to ∫ sec^4 (3x) tan^-3 (3x) From here I
1. 2 answers
2. 634 views
Last number from the sample test!A plane P passes by the coordinates: A(1,0,-7); B(-2,-1,0); C(0,0,-3) Using the equation of the
1. 0 answers
2. 613 views
This is another question I can't figure out.Given planes pie1 and pie2 defined as: pie1: 2x + 5y - 7x + 2 = 0 pie2: x + y - z +
1. 0 answers
2. 593 views
So I'm studying for my first exam and I'm stuck on this number.Given both lines: D1: (x,y,z) = (2,0,0) + k(0,3,0) D2: (x,y,z) =
1. 3 answers
2. 479 views
2 people move in the same direction along a line of equation:(x + 3)/10 = (y + 10)/20 = (z - 10)/-20 Mobile M1 is at a point
1. 3 answers
2. 383 views
Hello, I just wanted to verify if my work was good.Calculate the following integral by parts: ∫ upper limit is 1/5 and lower
1. 3 answers
2. 840 views
Hello, I just wanted to verify if my work was good.Calculate the following integral by parts: ∫ upper limit is 1/5 and lower
1. 0 answers
2. 485 views
Knowing u = (4,0,-3), v = (x,3,2) and that the orthogonal projection of v on u is a vector of norm 6, determine x.Thank you
1. 0 answers
2. 361 views
Ok this is the last one I promise! It's from a sample exam and I'm practicing for my finals :)Verify if the following 4 points
1. 1 answer
2. 536 views
Hello, I have another question from my linear algebra class. I'm asked to find the area of a triangle using determinants, but
1. 1 answer
2. 623 views
Knowing u = (4,0,-3), v = (x,3,2) and that the orthogonal projection of v on u is a vector of norm 6, determine x.Thank you
1. 0 answers
2. 406 views
Two coils, held in fixed positions, have a mutual inductance of 165 µH. What is the peak emf in one coil when the current in
1. 1 answer
2. 1,135 views
An inductor in the form of a solenoid contains 440 turns and is 15.8 cm in length. A uniform rate of decrease of current through
1. 1 answer
2. 1,900 views
Show that during the charging of the capacitor in an RC circuit, the charge of the capacitor, as a function of time, is: q(t) =
1. 5 answers
2. 550 views
A charge +q is at the origin. A charge –2q is at x = 2.00 m on the x axis. For what finite value(s) of x is (a) the electric
1. 1 answer
2. 2,148 views
A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant
1. 1 answer
2. 4,164 views
Two long straight parallel wires separated by a distance of 20 cm carry currents of 30 A and 40 A in opposite directions. What
1. 1 answer
2. 3,595 views
Discuss how art was used as a vehicle for propaganda, and whether such use is present in the works of Höch, Grosz, and Picasso.
1. 1 answer
2. 649 views
Given a function f(x) = squr(3 + 2x), on [-1,1], subdivided into 4 equally large intervals, calculate the Riemann sum SR4 =
1. 0 answers
2. 479 views
Solve the differential equation dy/dx = -xe^y and determine the equation of the curve through P(1,2)I tried solving the
1. 4 answers
2. 1,236 views
Supposed you stoppered the flasks after your titration to determine the equilibrium constant and kept the solutions for another
1. 6 answers
2. 2,741 views
Find the equilibrium moles for the following reaction with initially 0.051 mol for Ethyl acetate, 0.260 mol for water and
1. 4 answers
2. 629 views
Hey Dr.Bob, I asked two days ago a question about a titration lab I had that you answered, but I still have one more question
1. 4 answers
2. 992 views
This is the last question for a final exam preparation sheet and I can't figure out the answer. Any help would be greatly
1. 3 answers
2. 2,924 views
I had an equilibrium laboratory and had to answer a few questions after the lab. Here are 2 questions I can't seem to know how
1. 1 answer
2. 1,186 views
Explain how Florence reflects the ideals of the dominant city-state and how some of the geographical, economical, social, and
1. 0 answers
2. 444 views
Is ClO2>- a Bronsted acid, base, or both?
1. 1 answer
2. 4,883 views
I just wanted to be sure if my answers make any sense.Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose
1. 2 answers
2. 656 views
I just wanted to be sure if my answers make any sense.Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose
1. 1 answer
2. 677 views
Chlorine atoms contribute to the destruction of the earth's ozone layer by the following sequence of reactions:Cl + O3 --> ClO +
1. 0 answers
2. 748 views
Nitrogen Oxides, NOx (mixture of NO and NO2).The NOx in the atmosphere is slowly broken down to N2 and O2 in a first-order
1. 2 answers
2. 842 views
a pneumatic nail gun with muzzle speed of 37m/s fires a 5.0cm nail directly into a hard wood that stops the nail just when it is
1. 1 answer
2. 644 views
I had a lab about calorimetry where we would have a temperature probe in a calorimeter cup and then pour hot water into it to
1. 2 answers
2. 672 views
Derive a formula for the molar mass of the solute in terms of the freezing point depression, deltaT, the freezing-point
1. 2 answers
2. 1,366 views
Explain why each of the following is incorrect:(a) Entropy increases in all spontaneous reactions. Wouldn't (a) be actually
1. 6 answers
2. 922 views
Hello,I have this number where I don't understand why there's a negative sign to it. Consider a closed triangular box resting
1. 4 answers
2. 790 views
Hello,I had a lab about calorimetry and one of the questions was if the reaction of acetone with hypochlorite is an
1. 3 answers
2. 749 views
3) You pour 240 mL of Coke into a glass, where the T of the beverage is at 10.5 *C. You then add one ice cube of 45g.Determine
1. 4 answers
2. 1,159 views
How would an HA acid behave in water if it were a strong acid, weak acid, and non-electrolyte?
1. 1 answer
2. 503 views
i do not understand how to solve this problem, please help10.0mL 0.5M sulfuric acid can neutralize what volume of 0.5M ammonium
1. 2 answers
2. 525 views
If Pete colored 1/2 of a poster and Rebecca colored 1/3 of the poster. What fraction still needs to be colored?
1. 2 answers
2. 1,068 views
Mr Jones takes 4 hours to paint a fence.Mark his son takes 6 hours to paint the same fence. How long does it take for them both
1. 2 answers
2. 629 views
Type a short character sketch of a fictional Puritan named Justice Johnson based on what you have learned about the Puritans
1. 1 answer
2. 494 views
You are taking your friend to lunch and have exactly 15 dollars to spend. You want to leave a 15% tip. What is the maximum
1. 1 answer
2. 466 views
An electric current of 50 +/- 1 mA flows through an electric bulb filament that has a resistance of 10 +/- 2 ohm. Estimate the
1. 1 answer
2. 1,283 views

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