Total # Posts: 1,240
The circumference of a circle is found by the formula C=pi(d) where d is the diameter of the circle. Does circumference vary directly as diameter? If so what is the constant of variation
October 14, 2014
The boundaries between the Eurasian plate and the indo australian plate as well as the Nazca and the South American plate are convergent boundaries. What is a major difference in the geologic features and events at these two plate boundaries
October 14, 2014
Which is always a correct conclusion about the quantities in the function y=x+4 A. THe variable x is always 4 more than y B. When the value of x is negative the value of y is also negative C.The variable y is always greater than x D.As the value of x increases the value of y ...
October 13, 2014
An airplane flies clockwise around an airport control tower at a speed of 190 m/s. If that control tower is 8 km from the airplane at all times, what is the planes angular velocity (magnitude and direction)?
October 6, 2014
A bicyclist coasts without pedaling down an incline that makes an angle of 4o with the horizontal at a steady speed of 13 m/s. If the mass of the cyclist and the bike combined is 76 kg, use k-work (not Newtons second law) to estimate the force of friction that must be ...
October 6, 2014
A 55-kg block, starting from rest, is pushed a distance of 5.0m across a floor by a horizontal force Fp whose magnitude is 140N. Fp is parallel to the displacement of the block. The final speed of the block is 2.35m/s. a. How much work was converted to thermal energy? What ...
October 4, 2014
A projectile is launched from the earths surface at initial speed v0 at angle θ0 with the horizontal. When the projectile is at its maximum height h, it has half the speed it had when it was at half its maximum height (h/2). At what angle was the projectile launched?
September 13, 2014
Since the founding of the nation, there have been countless debates regarding how much power and autonomy should be afforded to the states in relation to the federal government. How much power and autonomy should Texas have in relation to the federal government? Why?
September 12, 2014
Write the formula for the polyatomic ion in NaNO 3. Write the formula for the polyatomic ion in Ag2CO3. Write the formula for the polyatomic ion in NaHCO3. Write the formula for the polyatomic ion in BaSO4
September 11, 2014
I just wanted to double check that I am correct. Answer is in Interval Notation. 1. Solve: |x|<7 Work: -7>x<7 Answer: (-7,7) 2. Solve: |x|>_ 7 Work: -7<_ x >_ 7 Answer: ( - infinity sign, -7] U [7, infinity sign)
September 9, 2014
Here is question on an math assignment I was given, I have no clue what it is even asking. It's a Challenge Yourself question, I've typed it exactly how it is on my paper: A student is having difficult figuring out what is wrong with his proof: Let C=D C^2=CD C^2 - D^2...
September 7, 2014
Which of these equations would not be in quadratic form? A.X^4-13X^2+36=0 B.2X^(2/5)+X^(1/5)-6=0 C.6x^3+2x^2-8X=0 D.3(2/x-4)^2+5(2/x-4)-2=0 I think its between C or D. C because the exponents are different not doubled and D because its set up is completely the opposite from ...
September 3, 2014
Suppose you were balancing a chemical equation that contained the substance sodium nitrate, NaNO3, composed of a sodium ion, Na+1, and a nitrate ion, (NO3)-1. Could you change any of these numbers in order to balance the equation?
August 25, 2014
A 66.2 kg person sits on the 5.3 kg sled (slope is on an angle, angle not given). It is to be pulled across the snow with a coefficient of friction equal to 0.12. What horizontal force is required to pill the sled at a constant speed?
June 16, 2014
The length of Joe's rectangular garden is 1 meter less than its width and its area is 120m^2. Find the dimensions of the garden. Setup a quadratic equation to find the dimensions of the garden.
May 12, 2014
Which of the following statements is not true about resonance? Answer It is easy to get an object to vibrate at its resonant frequencies but difficult to get it vibrate at other frequencies. A simple pendulum has many resonant frequencies called harmonics. A spring-mass system...
May 5, 2014
Three resistors, each of resistance 6 Ω, are connected in such a way that that they form the three sides of a triangle. What is the equivalent resistance between any two vertices of the triangle?
April 23, 2014
Richard Simons is selling his house. He has a choice of taking $125,000 today or $135,000 in 6 months. If he takes the money today, he can invest it at Valley Bank at 5% interest compounded monthly. a) How much would be in the account after six month if he took the $125,000. b...
April 13, 2014
A multiple choice exam has 20 questions; there are four choices for each question. A student guesses the answer to every question. Find the chance that he guesses correctly between four and seven times. Find the minimum score the instructor can set so that the probability that...
February 10, 2014
Consider 51.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 4.210. What volume of water must be added to make the pH = 5.000 I've tried everything but I am not getting the right answer!
January 26, 2014
In a survey of a TriDelt chapter with 50 members, 21 were taking mathematics, 32 were taking English, and 6 were taking both. How many were not taking either of these subjects?
January 22, 2014
a What are the major groups that blended to form the culture of this region? b What are some major sources of income in the economies of Central America and the Caribbean? c What forms of music have evolved in the region?
December 12, 2013
8th grade Science
In the early 1900s, Alfred Wegener noticed that some of the Earth's continents looked like they might fit together like a jigsaw puzzle. He also observed that the continents that looked like they fit together had similar plants, animals, and rock formations. From this ...
September 29, 2013
2. Assume you working on the house pictured below. The length of the house is 50 feet, the width is 30 feet, and from the ground to the gable (the height of the rectangle) is 10 feet. The height of the triangular prism on top is 6.5 feet.
September 20, 2013
An automobile and train move together along parallel paths at 28.8 m/s. The automobile then undergoes a uniform acceleration of −4 m/s 2 because of a red light and comes to rest. It remains at rest for 63.8 s, then accelerates back to a speed of 28.8 m/s at a rate of 1....
May 21, 2013
Writing skills 1
1. Which of the following is correct in regard to the use of formal English? A. Formal English is used more frequently in speaking than in writing. B. In formal business correspondence, it's best keep the language impersonal. C. Contractions are considered acceptable in ...
May 9, 2013
I just to know how to identify the substance that is reduced, the substance that is oxidized, the oxidizing agent and the reducing agent in each reaction. As (s) + ClO3-(aq) → H3AsO3 (aq) + HClO(aq) CN-(aq) + MnO4-(aq) → CNO-(aq) + MnO2(s) C2H5OH + MnO4- → ...
April 30, 2013