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Chris

Questions (1,410)

You test a moon buggy on earth. When the buggy hits a bump, it oscillates up and down on its springs with a period of 4 seconds.
1. 1 answer
2. 608 views
What is the riddle for moving words
1. 4 answers
2. 1,054 views
Let’s assume you have 250 ml of a 1.3M KOH solution and you want to neutralize it with the acid HBr. It takes 350 ml of the
1. 5 answers
2. 808 views
For an H+ concentration, [H+], of 4.3 x 10-4 M, would this be acidic, neutral or basic? Why?I'm assuming that because it is an
1. 2 answers
2. 896 views
To make 250 ml of a 5%(w/v) calcium carbonate solution, how many grams of calcium carbonate will I need?
1. 2 answers
2. 896 views
I have 40 questions, 4 marks given for a correct answer, 2 marks deducted for each wrong answer and 1 mark deducted for for each
1. 2 answers
2. 763 views
student takes out two loans 1 at 10% and the other at 12 percent interest the 10 percent loan is $2000 more then the 12% loan
1. 1 answer
2. 1,352 views
True/false Earth's atmosphere oceans and continents began to form during the first several hundred million years of the
1. 8 answers
2. 2,284 views
I missed a few days of school due to a sick child. I'm reviewing for an exam and the following questions are giving me trouble
1. 4 answers
2. 551 views
I missed a few days of school due to a sick child. I'm reviewing for an exam and the following questions are giving me trouble
1. 4 answers
2. 698 views
What is the national monument of America?
1. 1 answer
2. 489 views
What's the minimum coefficient of friction between the ladder (of length d) and the ground will keep it from slipping? (consider
1. 0 answers
2. 552 views
An 63 kg construction worker is sitting 2.0 m from the end of a 1435 kg steel beam to think about the state of the world. Find
1. 0 answers
2. 671 views
Astronauts are in space so there is no gravity, but they wish to weight themselves. The spring constant is 265 N/m. The question
1. 0 answers
2. 428 views
What is a metaphor for improvement?
1. 1 answer
2. 897 views
A. You drag a suitcase of mass 19 kg with a force of F at an angle 41.3 degrees with respect to the horizontal along a surface
1. 1 answer
2. 1,868 views
Here's a stationary bike. If you pedal such that the front wheel rotates at 6.9 rad/s, and that wheel's radius is half a meter,
1. 1 answer
2. 673 views
Propose methods for protecting the sodium hydroxide solution in the bottle and the buret from exposure to carbon dioxide in the
1. 1 answer
2. 411 views
A woman has money in two accounts. One account pays 7% annual interest, whereas the other pays 15% annual interest. If she has
1. 1 answer
2. 1,695 views
A sample of methane (CH4) gas contains a small amount of helium. Calculate the volume percentage of helium if the density of the
1. 2 answers
2. 4,458 views
1. A sample weighing 1.30 mg was analyzed to determine the concentration of a certain compound (FW =292.16 g/mol) using
1. 1 answer
2. 682 views
A 50mV signal is applied to the base of a properly biased transistor with r'e=10ohms and RC=560ohms. Determine the signal
1. 0 answers
2. 722 views
What development marked the start of the Archaic Age in Greece?
1. 1 answer
2. 480 views
(3^-1X^3)^2 x 12X^5my work: 3/2X^6 x 12X^5= 36/2=18X^11 but the answer was 4/3X^11
1. 1 answer
2. 446 views
For N balls, m are black and the rest white,what is the probability that in the first n balls from N, 1 of them are black.Here
1. 0 answers
2. 321 views
what is the horizontal distance a slingshot on a 25 m cliff will shoot if it's initial velocity is 240 m/s and it's inclined at
1. 0 answers
2. 419 views
If you are riding your bike and hit a curb and stop suddenly at 25m/s when you hit the curb and it took you only .75 seconds to
1. 1 answer
2. 541 views
The concentration of stain in the bottle was 5% and you added 100 microliters of it to 9.9ml of a buffer to make a working
1. 1 answer
2. 653 views
Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17.
1. 1 answer
2. 577 views
Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17.
1. 0 answers
2. 501 views
Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17.
1. 1 answer
2. 542 views
1/8uw +1/8vw
1. 1 answer
2. 354 views
The peak of a mountain is observed from the base and from the top of a tower 180 ft high. Find the height of the mountain above
1. 1 answer
2. 1,163 views
How can you make 83c using only pennies, nickels,dimes ,or quarters
1. 1 answer
2. 546 views
The speed of an arrow fired from a compoundbow is about 57 m/s. An archer sits astride his horse and launches an arrow into the
1. 1 answer
2. 1,477 views
32 gal/min = qt/h
1. 12 answers
2. 4,301 views
2 times{(300-90 divided by 5)-[3 times 26-(8-2 times 3
1. 1 answer
2. 382 views
If A is 25% more than B, the B is ? less than A.A. 10% B. 15% C. 20% D. 25%
1. 2 answers
2. 340 views
Express the following in terms of Sum(or differnece) of logarithm's:log sub-b T^5 W^2 Z
1. 1 answer
2. 477 views
Convert to an exponential equation:-In45=3.80666249 and -Log sub.B T^5=W
1. 1 answer
2. 485 views
Four students at a computer fair competed against each other in a space-travel game. Chris scored 2/3 as many points as the
1. 2 answers
2. 606 views
How many cubic yards of concrete are needed to make 1200 square concrete posts 9 inches by 9 inches by 6 feet?
1. 2 answers
2. 487 views
Lisa can make a costume twice as fast Justin can. If they both work together, they can make it in 8 hours. How long will it take
1. 1 answer
2. 467 views
Sam had a total of 80 foreign stamps and local stamps combined. After giving away 1/3 of his foreign stamps and 10 local stamps,
1. 6 answers
2. 3,277 views
Sue left her home at 6 A.M. driving her car at the rate of 50 miles per hour. At 8 A.M. her brother Kevin drove after her along
1. 2 answers
2. 804 views
Hello Steve, it didn't work for "t" i can't get the actual value...Find the time required for an investment of 1 dollars to grow
1. 4 answers
2. 508 views
1.Give a quadratic function q(x) with a vertex of (-1, 2).2. Give a function h(x) which does not have an inverse function. 3.
1. 1 answer
2. 882 views
For the following pair of functions, f(x)-x+2, g(x)-√x-1find each of the following and state its domain: a.) find (f+g)(x)
1. 1 answer
2. 667 views
Find the absolute maximum and minimum values of each function on the given interval. f(x)=x(e^-x)
1. 2 answers
2. 490 views
How do I work efficiently without getting distracted?
1. 2 answers
2. 407 views
what can I do after matric with these subjects
1. 4 answers
2. 982 views
A student synthesized 6.895 g of barium iodate monohydrate, Ba(IO3)2*H2O by adding 30.00 mL of 5.912 x 10-1 M barium nitrate,
1. 1 answer
2. 746 views
If a vehicle travels 1320 feet in seven seconds from a dead stop , how long does it take for that same vehicle to travel 1313
1. 1 answer
2. 555 views
1.Electric lighting was a novelty before it became (1 point) unusual. common.* expensive. 2. Read the following paragraph from
1. 3 answers
2. 776 views
What is the function or purpose of kinship systems, particularly descent groups and terminology naming practices? Why is the
1. 2 answers
2. 751 views
What aspects do anthropologists look at when they study political systems? Describe the types of societies, as well as the role
1. 1 answer
2. 603 views
In a Forbes magazine article from October 2013 Susan Adams wrote of a survey done by the National Association of Colleges and
1. 1 answer
2. 578 views
Discuss the mechanisms of culture change. How can anthropology help one maintain a balanced perspective in a changing world?
1. 4 answers
2. 575 views
The teacher gave this pattern to the class: the first term is 5 and the rule is add 4, subtract 1. Each student says one number.
1. 4 answers
2. 1,077 views
A carpenter has several boards of equal length. he cuts 3/5 of each board. After cutting the boards, the carpenter notices that
1. 3 answers
2. 3,278 views
Chad buys peanuts in 2 pound bags. He repackages them into bags that hold 5/6 pound of peanuts. How many 2 pound bags of peanuts
1. 2 answers
2. 1,822 views
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.187 g sample of NH4Cl is added to 65.0 mL of water in a
1. 1 answer
2. 2,954 views
A 271-g sample of nickel at 94.1°C is placed in 100.0 mL of water (density = 1.00 g/mL) at 23.9°C. What is the final
1. 6 answers
2. 1,160 views
Given the thermochemical equation 2SO2 + O2 → 2SO3, ΔH°rxn = -198 kJ/mol, what is the standard enthalpy change for the
1. 2 answers
2. 4,207 views
Given 2Al(s) + 3/2O2(g) → Al2O3(s), ΔH°f = -1,670 kJ/mol for Al2O3 (s). Determine ΔH° for the reaction 2Al2O3(s) →
1. 2 answers
2. 1,955 views
A piece of copper metal is initially at 100.0°C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a
1. 2 answers
2. 1,965 views
A system initially has an internal energy U of 493 J. It undergoes a process during which it releases 107 J of heat energy to
1. 1 answer
2. 752 views
Calculate the enthalpy change for the reactionsNO(g) + O(g) → NO2(g) from the following data: NO(g) + O3(g) → NO2(g) + O2(g)
1. 4 answers
2. 8,769 views
1) Calculate the cell potential, at 25 C, based upon the overall reactionZn2+(aq) + 2 Fe2+(aq) -> Zn(s) + 2 Fe3+(aq) if
1. 3 answers
2. 1,363 views
1) Assuming the following reaction proceeds in the forward direction,3 Sn4+(aq) + 2 Cr(s) ---> 3 Sn2+(aq) + 2 Cr3+(aq)
1. 2 answers
2. 4,047 views
find the derivative of the functionintegral from cosx to sinx (ln(8+3v)dv) y'(x)= (sin(8+3((sin(x)))+x)+sin(8+3sin(x)-x))/2 Is
1. 2 answers
2. 789 views
find the derivative of the functionintegral from cosx to sinx (ln(8+3v)dv)
1. 4 answers
2. 668 views
A regular hexagon is drawn inside of a circle so that each of its vertices touches the circle. The diameter of the circle is 4
1. 3 answers
2. 2,663 views
Two dice are rolled what are the odds of getting a smaller number on the second roll? P ( same number or sum greater than 8)
1. 0 answers
2. 659 views
A system which undergoes an adiabatic change (i.e., q = 0) and has work done on it by the surroundings hasa. w < 0, ΔU = 0 b. w
1. 1 answer
2. 3,745 views
Farmer Brown wants to fence in a rectangular plot in a large field, using a straight rock wall that is already there as the
1. 1 answer
2. 3,363 views
Farmer Brown wants to fence in a rectangular plot in a large field, using a straight rock wall that is already there as the
1. 1 answer
2. 680 views
Simplify 15C3A. 182 B. 455 C. 2,730 D. 910
1. 5 answers
2. 4,711 views
13. A true or false test has 8 questions. What is the probability of guessing the correct answers to all the questions?A. 1/10
1. 10 answers
2. 7,429 views
Each of two urns contains green balls and red balls. Urn one contains 10 green balls and 8 red balls. Urn two contains 3 green
1. 9 answers
2. 3,241 views
Food Express is running a special promotion in which customers can win a free gallon of milk which their food purchase if there
1. 3 answers
2. 2,110 views
3. A number cube is rolled 160 times. The number 2 comes up 39 times. What is the experimental probability of rolling a 2? What
1. 3 answers
2. 1,524 views
1. Which of the following choices is a strategy that could help with time management?A. Spending most of the day on leisure
1. 62 answers
2. 31,064 views
What mass of lithium phosphate is needed to prepare 500.0 mL of a solution having a lithium ion concentration of 0.1385 M?
1. 3 answers
2. 2,740 views
Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 4.69 g sample of vinegar was neutralized by 32.97 mL of
1. 2 answers
2. 4,472 views
What mass of hydrogen gas is produced when a 7.43 g chunk of zinc dissolves in 500.0 mL of 1.200M HCl?
1. 2 answers
2. 803 views
A 4.379 g sample of MgCl2 is dissolved in enough water to give 750.0 mL of solution. What is the chloride ion concentration in
1. 1 answer
2. 968 views
A number cube with numbers 1 through 6 is rolled. Find the given probability.P(complement of 4) A. 1/6* B. 5/6 C. 2/6 D. 4/6
1. 5 answers
2. 1,880 views
A number cube with numbers 1 through 6 is rolled. Find the given probability.P(number¡Ý3) A. 4/6 B. 1/6 C. 2/6 D. 5/6*
1. 1 answer
2. 620 views
A number cube with numbers 1 through 6 is rolled. Find the given probability.P(number<2) A. 1/6* B. 2/6 C. 4/6 D. 3/6
1. 1 answer
2. 752 views
A lightning bolt may carry a current of 1.00 ✕ 104 A for a short time interval. What is the resulting magnetic field 134 m
1. 1 answer
2. 801 views
-7x + 9y = -298x + 5y = -28
1. 1 answer
2. 356 views
solving applied problems two equations (Coles two student loans totaled $31,000. One of his loans was at 2.8% simple interest
1. 1 answer
2. 598 views
Sam spent half his money on a shirt. At another store he spent half the money he had left. Then he bought a cd for $6.75. He had
1. 2 answers
2. 988 views
A block of mass m = 2.7 kg is released from rest at a height of H = 0.49 m on a curved frictionless ramp. At the foot of the
1. 1 answer
2. 565 views
At the top of an inclined track, a spring is attached to a rod at one end and a dynamics cart at the other such that the spring
1. 0 answers
2. 781 views
A spring of unknown force constant is attached to a rod so that it hangs vertically. With no mass attached, the spring has a
1. 1 answer
2. 4,699 views
A 25.5- kg block (m1) is on a horizontal surface, connected to a 5.7- kg block (m2) by a massless string as shown in the Figure.
1. 0 answers
2. 703 views
Sorry I submitted before finishing my input.Arrange the terms of the polynomial in ascending powers of b. 25db^5-7dm+3b^10-6db^6
1. 0 answers
2. 508 views
Arrange the terms of the polynomial in ascending powers of b.25db^5-7dm+3b^10-6db^6 Please tell me if I am correct on my answer?
1. 1 answer
2. 508 views

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