Total # Posts: 196
A billiard ball travels 22 cm in the positive direction, hits the cushion and rebounds in the negative direction, and finally comes to rest 7.5 cm behind its original position.
February 16, 2017
why did Thomas Jefferson turn to nullification in an effort to right the wrongs of the alien and sedition acts? a. The federalists controlled the courts b. he had significant influence over the states c. he believed the states were meant to control the federal government *** d...
September 29, 2016
Getting done a plastic surgery will contain side effects leading quite severe pains such as: back pain, bruises and so on. This is so serious that you may have to wear head bandages after a surgery. Getting done a plastic surgery will contain side effects is not correct
January 19, 2016
You pull a 30.5 kg wooden box with a rope that makes a 23.0° angle with the horizontal at a constant speed. The coefficient of kinetic friction between the box and the deck is 0.330. You pull the crate a distance of 5.25 m. How much work was done? Do you use f=ma and how ...
January 3, 2016
How much heat would be absorbed by 55 grams of copper when heated from 24 degrees Celsius to 40 degrees Celsius? The specific heat of copper is .385 My answer is 338.8 Joules. Is this correct?
June 10, 2015
What does this quote mean: Fire hath its force abated by water, not by wind, and anger must be allayed by cold words and not by blustering threats. Please help. I have no idea.
March 2, 2015
suppose that the teacher of this class graded solely on a curve - 10% get A, etc. How might this effect students getting into into study groups to prepare homework or tests?
October 11, 2014
An 80.0 kg rollerblader is at rest at the top of a 100 m hill at a 7o incline. The coefficient of friction on the hill is 0.110. What is the roller blader's kinetic energy at the bottom of the hill?
September 22, 2014
The density of 19.0% by mass of nitric acid, HNO3 is 1.11 g cm-3. Calculate the volume (dm3) of acid needed to prepare 2.00 dm3 of 3.00 mol dm-3 HNO3 solution. (FW HNO3 = 63 g/mol)
March 28, 2014
A closed cardboard box is made with a square top and bottom, and a square horizontal shelf inside that divides the interior in half. A total of 12 square meters of cardboard is used to make the top, sides, bottom, and shelf of the box. What should the dimensions of the box be ...
November 15, 2013
A dog kennel with four pens is to be constructed. The pens will be surrounded by rectangular fence that costs $23 per meter. The rectangle is partioned into four pens of equal size with three partitions made of fence that costs $12 per meter. Each pen measures x meters wide by...
November 15, 2013
27 ft of wire is to be used to form an isosceles right triangle and a circle. Determine how much of the wire should be used for the circle if the total area enclosed is to be a maximum? I can only find the minimum because the parabola is opening upward
November 11, 2013
Electron exhibiting a particle wavelength of 7.18 x 10-9 are emitted from hydrogen atoms after interaction with high energy photons. Assuming that the electrons in the hydrogen atom were in their ground state prior to interaction, determine the wavelength of the photon which ...
October 12, 2013
Question 20 of 20 5.0 Points If the government attempts to control pollution with a command-and-control policy: A. the government will control the firm's entire production process. B. the government will force the firm to use particular pollution-control technologies. C. ...
September 17, 2013
a large bus and a van, both moving with a velocity of magnitude v, have a head-on-collision and both the vehicles stop after the collision. if the time of the collision is 1 sec then, a) which vehicle experiences smaller force of impact? b) which vehicle experiences the ...
June 7, 2013
Suppose that we repeat the experiment shown in the video, but we replace one of the cylinders with a cylinder that has twice the radius (and use larger containers of water). If the height of the original cylinder is \rm h, how deeply must we submerge the new cylinder to get ...
April 23, 2013
A key falls from a bridge that is 45 m above the water. The key falls straight down and lands in a model boat traveling at a constant velocity of 3.5 m/s. Calculate the distance the boat was from the point of impact when the key was released. Answer d= 10.6 m
November 11, 2012
A ball is dropped from the top of a building. The balls fall 3 times farther during its last second of freefall than it did during its third second of freefall. The ball fell 4.9 meters during its first second, how tall is the building and how much time is the ball in the air...
November 11, 2012
Evaluate the integral using any method: (Integral)sec^3x/tanx dx I started it out and got secx(1tan^2x)/tanx. I know I just have to continue simplifying and finding the integral, but I'm stuck on the next couple of steps. Also, I have another question witht he same ...
October 1, 2012
Find the volume of the solid generated by revolving the region bounded by the line y=5x+6 and the parabola y=x^2 about the following lines: a) the line x=6 b) the line x=-1 c)the x axis d) the line y=36 Thanks!
September 16, 2012
A 50.0 mL graduated cylinder has a mass of 67.6 g. When it is filled with an unknown liquid to the 38.8 mL mark, the cylinder and liquid combined have a mass of 119.4 g. Calculate the density of the liquid in g/cm3. (1 mL = 1 cm3.)
September 12, 2012
Equal Masses of phosphorus and chlorine react according to the follow equation. 2P+3Cl2=2PCl3 Which reagent is in excess and what percentage of it will remain at the end of the reaction
May 9, 2011