Total # Posts: 171
On planet X, the alien residents use a temperature scale in which they define 0 degrees X to be the melting point of nitrogen and 100 degrees X to be the boiling point of nitrogen. What temperature difference in X degrees does a temperature change of 1 C degree correspond to? ...
January 14, 2014
A wooden bridge crossing a canyon consists of a plank with length density λ = 2.25 kg/m suspended at h = 10.89 m below a tree branch by two ropes of length L = 2h and with a maximum rated tension of 2000 N, which are attached to the ends of the plank, as shown in the ...
November 10, 2013
A uniform rod of mass M = 437.0 g and length L = 37.1 cm stands vertically on a horizontal table. It is released from rest to fall. A)Which of the following forces are acting on the rod? B)Calculate the angular speed of the rod as it makes an angle θ = 45° with ...
November 3, 2013
A force, F = (2x + 3y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (5x + 4y + 2z) m. Calculate the torque (in units on Nm) created by the force about that pivot point.
November 3, 2013
A Major League fastball is thrown at 92.1 mph and with a spin rate of 103 rpm. If the distance between the pitcher's point of release and the catcher's glove is exactly 61.4 ft, how many full turns does the ball make between release and catch? Neglect any effect of ...
October 22, 2013
A 27.7-cm-by-27.7-cm checkerboard has a mass of 103.1 g. There are four 27.7-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers ...
October 20, 2013
A fire hose 4.79 cm in diameter is capable of spraying water at a velocity of 17.1 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationary?
October 20, 2013
Oxygen gas has a Henry's law constant of 1.66*10^-6 M/mm Hg at 40 degree C when dissolving in water. If the total pressure of gass (O2 gas plus water vapor) over water is 1.0 atm, what is the concentration of O2 in the water in grams per milliliter? Pressure of the water ...
October 15, 2013
Tarzan swings on a vine from a cliff to rescue Jane, who is standing on the ground surrounded by snakes. His plan is to push off the cliff, grab Jane at the lowest point of his swing, and carry them both to the safety of a nearby tree (see figure). Tarzan's mass is 76.1 kg...
October 13, 2013
Although they dont have mass, photonstraveling at the speed of lighthave momentum. Space travel experts have thought of capitalizing on this fact by constructing solar sailslarge sheets of material that would work by reflecting photons. Since the ...
October 13, 2013
The electron-volt, eV, is a unit of energy (1eV = 1.602 ·1019 J, 1 MeV = 1.602 ·1013 J). Since the unit of momentum is an energy unit divided by a velocity unit, nuclear physicists usually specify momenta of nuclei in units of MeV/c, where c is the ...
October 13, 2013
8th grade reading ! please help !
I have a presentation due tomorrow on a connection that I made with the Anne Frank Remembered novel but I cant think of an item that I can connect to the novel.. I need help. It has to be one paragraph about the connection and it can be a song,poem,or object. Please help me !
September 23, 2013
A train has a mass of 5.27E+6 kg and is moving at 53.9 km/hr. The engineer applies the brakes, which results in a net backward force of 1.30E+6 N on the train. The brakes are held on for 25.6 s. What is the new speed of the train? How far does it travel during this period?
September 22, 2013
18.0 g of liquid water is initially at 0 C. How much heat, in kJ, must be added to transform this into 18.0 g of steam at 200 C? The heat capacity of liquid water is 75.3 J/mol C. The heat capacity of steam is 37.4 J/mol C. The heat of vaporization is 40.65 kJ/mol.
December 16, 2011
1. One of the addictive aspects of alcohol can be found in the difference between actual effects and perceived effects. Although alcohol is a depressant, many claim that it: (a)causes intoxication. (b)results is slurred speech. (c)produces feelings of happiness. (d)reduces ...
June 5, 2011
A copper sheet of thickness 2.49 mm is bonded to a steel sheet of thickness 1.51 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 24.1°C.
April 11, 2011
Karla borrowed $750 at 12 percent for one year. She paid a $20 processing fee. The interest paid will be $95.00, $92.50, or $90.00 Thus, the total finance charge (the interest plus the processing fee) will be? $115.00, $112.50, or $110.00 ? Therefore, to the nearest tenth, the...
January 26, 2010
A Box (15.0 kg) is pulled up a 37 degree ramp with a force of 295 N. The frictional force acting on the block is 56.0 N. If Box travels 12.0 m up the ramp, determine the change in Boxs PEgrav.
December 3, 2009
The speed limit in a school zone is 40.0 km/hr. A driver traveling at this speed sees a child run into the road 14 m ahead of the car. The driver applies the brakes and the car slows at a uniform rate of 8.3 m/s^2. If the driver's reaction time is 0.27 sec, what distance ...
December 2, 2009
Would the real monster in Mary Shelley's Frankenstein be Victor Frankenstein because he just leaves the monster to care for himself and wants nothing to do with it? or someone else?
February 19, 2009
Need information on the character of Mike Taylor in the book "The Place of Lions" by Eric Campbell. Physical Appearance, Actions, Thoughts and Words, Other characters thoughts and feels, and aughtor tells directectly. Thank you.
November 11, 2008
I am doing a National History Day project this year on the topic of "From Conflict to Compromise" and my thesis statement has to be turned in tomorrow. Could someone check it and make sure it is arguable and true? The inequality of women caused them to become ...
December 9, 2007
I didn't write it. It was on a worksheet. But I do have to fix it. I already went to that site and if I were to change it to: The man wearing the suit was her former fiance. would that make it a participial phrase?
December 6, 2007
This is a homework question, but one I have been curious about since I could pick up a book. Why are there brackets around random words in a quote? For example on book reviews there are brackets around one or a few words and I can't understand why.
September 30, 2007
what is the seasonal temperature and the rainfall amount for China northeast temperate forest, for all four seasons? Since this is not my area of expertise, I searched Google under the key words "temperature rainfall China" to get these possible sources: (Broken Link...
March 24, 2007
i really need to know what.... 4 to the power of 77 is... 477 = 2.28360 x 1046 according to my calculator. i don't know how to do factors with two digit numbers. Please click Post a New Question, put Math in the subject line, and post your question. It would help if you ...
February 20, 2007
To be written on the axis of a graph,suggest two quantities that might be described by the statement. 1) When one quantity decreases, the other decreases. 2) When one quantity decreases, the other increases. 3) When one quatity increases, the other decreases. 4) Both ...
January 14, 2007
What is cytoplasmic strand? and can you give me a website wherein I can find informations pertaining to plant and animal cell long chains of protiens that secure the neucleus in the middle of the cell, as well as performing other functions during mitosis and maintaining cell ...
November 22, 2006
1. The standard heat of formation of glucose and lactic acid are -1274.45 and -694.04 kJ/mole, respectively. The molar heat capacity of the two compounds are 218.86 and 127.6 J/(mol)K a.) What is the total heat of reaction at 25 degree Celsius for the formation of lactic acid ...
November 19, 2006