Total # Posts: 1,431
A ball is dropped from a height of 30 feet and allowed to bounce until it comes to arrest each time the ball bounces it rebounds to 3/5 of its previous high after which bounce is the boss hi 10.8 feet. I understand the height gets shorter but is there a equation to solving ...
January 24, 2017
A 0.446-gram sample of iron ore is dissolved in HCl and the iron (Fe solid) is reduced to Fe2+. The solution is then titrated by 38.6mL of 0.105 N KMn)4. Calculate the percentage of Fe in the iron ore sample.
January 22, 2017
Determine the circumference of a circle with 7.4 centimeter radius. (Use 3.14 ) Im not trying to get this completely answered. I just need help with what to do first. Thank you so much.
January 9, 2017
Calculate the total pressure above 1.0L solution of a 1.42M CH3OH(aq) solution at 25 degrees(C). The vapor pressure of pure methanol at 25 degrees (C) is 127.1 torr and the vapor pressure of the pure water is 23.8 torr at 25 degrees(C. You may assume that the density of the ...
December 6, 2016
What is the vapor pressure of a solution prepares by dissolving 4.25g of K2O in enough water to preapare 1.25L of Solution at 25 degrees (C)? Assume that the density of the solution is 1.00 g/mL and that the vapor pressure of pure water is 23.8 torr at 25 degrees (C). I've...
December 6, 2016
During an adiabatic process, the temperature of 6.50 moles of a monatomic ideal gas drops from 525 °C to 169 °C. What is the work done? Here is my work, is it correct? T1 = 525+273 = 798 K T2 = 169 + 273 = 442 K work done = R[T2-T1]/1-gamma = 8.314[525 - 798]/(1-1.67...
November 30, 2016
i have but i dont think my interpretation of the story is correct, i must prepare a speech about this story and I dont want to be inncorect since my proffesor said to ask others
November 30, 2016
has anyone read the short story "the new veterans" and can give me like a summary of what happened in the story? i already tried looking online but couldn't find a complete summary? i just need to know mainly the plot? it would be much help
November 30, 2016
A Carnot engine of efficiency 41% operates with a cold reservoir at 24 °C and exhausts 1290 J of heat each cycle. What is the entropy change for the hot reservoir? Answer in J/K. I keep getting the answer incorrect. Here is the work: Efficiency = 100*(Th- Tc)/Th 41 = 100*(...
November 28, 2016
Which of the following is a key idea of transcendentalismo? Belief in human reason Belief in personal insights Belief in expansion of the country Belief in isolation from other nations
November 28, 2016
A quartz sphere is 14.0 cm in diameter. What will be its change in volume if its temperature is increased by 305 °F? (the coefficient of volume expansion of quartz is (1.50 × 10^-6) °C-1) Answer in cm^3 I tried this twice and got 0.657 cm^3 and 0.18cm^3 but they ...
November 16, 2016
a box sliding on a horizontal surface with a speed of 6m/s encounters an incline plane that makes a 15 degree angle with the horizontal line. What is the max distance that will be travelled by the box up the incline before coming to rest if the coefficient of kinetic friction ...
November 13, 2016
A car is traveling at 7.0 m/s when the driver applies the brakes. The car moves 1.5 m before it comes to a complete stop. If the car had been moving at 14 m/s, how far would it have continued to move after the brakes were applied? Assume the braking force in both cases is ...
November 12, 2016
A raft is made of 15 logs lashed together. Each is 30.0 cm in diameter and has a length of 7.00 m. How many people (whole number) can the raft hold before they start getting their feet wet, assuming the average person has a mass of 66.0 kg? Do not neglect the weight of the ...
November 9, 2016
The measurement of the circumference of a circle is found to be 70 centimeters, with a possible error of 0.9 centimeter. a) Approximate the percent error in computing the area of the circle. (Round your answer to two decimal places.) b) Estimate the maximum allowable percent ...
October 31, 2016
HELP!! I have no idea to get this answer :( a doctor wants to estimate the HDL cholesterol of all 20-29 year old females. how many subjects are needed to estimate the HDL cholesterol within 4 points with 99% confidence assuming the standard deviation is 10.8? Suppose the ...
October 8, 2016
Logan puts a wallpaper border along the top edge of the Four Walls of a rectangular room the room is 10 feet long and 12 feet wide if there are no breaks in the Border how long is it?
September 27, 2016
Explain the structure of a water molecule and how hydrogen bonding leads to some of its very special properties. Be sure to include how these properties are important to life on Earth
September 24, 2016
Physical Science/ Chemistry
Which of the following shows the correct order of Family #1 elements from least to most reactive? A) Li, Na, Rb, K B) Li, Na, K, Rb C) Rb, K, Na, Li D) Li, Na, K, Ba
September 22, 2016
Nathan plants equal sized square of sod in his front yard each square has An area of 6 square feet Nathan plants a total of 1,000 squares in his yard what is the total area of the square sod
September 18, 2016
scores on a University exam are normally distributed with a mean of 68 and a standard deviation of 9. use the 68-95-99.7 rule to answer the following questions 1) what proportions of students score between a 59 to 77? 2) what proportions of students score between a 50 to 86? 3...
September 5, 2016
Check my answers 63. What type of bond links the monomers together in a polymer? Poly bond Covalent bond Ionic bond Hydrogen bond*** 64.What is the change in atomic mass when an atom emits a beta particle? decreases by 1*** increases by 1 decreases by 2 remains the same 65. ...
June 2, 2016
You are given Ka of carbonic acid is 4.3 x10^-7. This means that Carbonic acid is a good hydrogen-ion acceptor*** good hydrogen-ion donor poor hydrogen-ion acceptor poor hydrogen-ion donor
June 2, 2016
Which statement best describes the provisions of the Missouri Compromise? a) It maintained the balance of free and slave states. b) It enacted a stricter fugitive law. c) It outlawed slavery in the District of Columbia. d) It prohibited slavery in the Northwest Territory.
May 26, 2016
What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2*** Cr2O7^-2 - -> Cr^+3
May 20, 2016
I am doing a practice test and I am stuck on a couple of questions. 1.) Write a rule for the following sequence 8, -1, -10, -19 2.) Find the next three terms of the sequence -2, -12, -72, -432 3.) Which explains why the sequence 81, 3, 1/9 thanks
April 17, 2016
How much would you have to invest into a 5 year certificate of deposit paying 2.3% compounded weekly to make it worth $4500 at the end of the term? A=P(1+r/n)^nt 4500=P(1+0.023/52)^52(5) I am receiving a syntax error please help
April 9, 2016
a block slides along a path that is without friction until the block reaches the section of length L = 0.75 m, which begins at height h = 2.0 m on a ramp of angle θ = 30°. In that section, the coefficient of kinetic friction is 0.40. The block passes through point A ...
March 30, 2016
Why does Shelley have Frankenstein choose England for the creation of the second creature. What possibilities from her life might be reflected in this? How does this choice relate to Romanticism?
March 16, 2016
Prepara (1) _____ para salir de viaje el lunes por la mañana. Para ello, haz (2) ______ las maletas, sal (3) _____ de la habitación y métete (4) _____ en el coche. Después, ponte (5) _____ el cinturón y ten (6) ____ paciencia porque el viaje ...
March 3, 2016
Boxes A and B are connected to each end of a light vertical rope. A constant upward force F = 80.0 N is applied to box A. Starting from rest, box B descends 12.0 m in 4.00 s. The tension in the rope connecting the two boxes is 36.0 N. What are the masses of (a) box B, (b) box A?
March 1, 2016
Two sides of a triangle have lengths 8 m and 13 m. The angle between them is increasing at a rate of 0.08 radians /min. How fast is the length of the third side increasing when the angle between the sides of fixed length is π/3 radians.
February 24, 2016
The problem has two related parts 1) let a be an arbitrary real number. Find the distance between the point (1,2) and the point (4,a). (answer should be an algebraic expression in terms of a). 2) find the value of b for which the point (0,b) is equidistant from (4,4) and (5,-4...
February 24, 2016
While servant leadership is often associated with Christianity and the Bible, one could argue it is compatible with most religions and philosophies and that it transcends cultures. This assignment presents you with an opportunity to explore other cultures, philosophies, and ...
February 20, 2016
Why does meiosis and fertilization lead to the greatest variety of genetic combinations ? . iM doing test corrections and I am struggling to explain the question above . So far all i said was that that was the only answer that made sense but i need more details , please help ...
February 17, 2016
Math and are my answers correct
1.Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in the following box plots: two box plots shown. The top one is labeled Males. Minimum at 1, Q1 at 3, median at 10.5, Q3 at 14, maximum at 21. The ...
February 15, 2016
URGENT! Due soon and I used 8 of 10 attempts
Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 14C present in the object. The amount of isotope decreases in a first-order process. If 14.5% of the original amount of 14C is present in a wooden tool at ...
February 14, 2016
Write an equation that expresses the following relationship. U varies directly with the cube of P and inversely with D. In your equation,use K as the constant of proportionality.
February 7, 2016
Find the complete predicate and the verb or verb phrase, 1. Carl lifted the lid of the pot. Lifted is the verb Lifted the lid of the pot is the Complete predicate Is this right?
January 28, 2016