mu mun asked 2/14/2011 A 75kg adult sits at one end of a 9.0m long board.His 25kg child sits on the other end.(a)Where should the pivot be placed so that the board is balanced,ignoring the board's mass?
Corey Irving asked 1/21/2011 A cross-country runner runs 10 km in 40 minutes. What's his average speed?
Kady Beckles asked 1/18/2011 When determing the centre of gravity of an irregular shaped lamina, why should the lamina be able to swing freely?
Hollie Thompson asked 11/13/2010 How do vibrations in the air turn into the sensation of sound in your brain?
Anonymous asked 11/7/2010 The general term for the manipulation of the unique properties of light for a variety of purposes and products is _________?
Anonymous asked 10/29/2010 What is the charge on Carbonate ion ( CO3 2- ) ? Compared to the number of protons , how many electrons does the carbonate ion have?
Chandler Tillman asked 10/19/2010 The force of gravity acting on an object near Earth's surface is Proportional to the mass of the object. Why does a heavy object not fall faster than a light object (ignoring air resistence)?
akshay singla asked 10/19/2010 What is the wave length of a 2-eV red photon? Repeat your calculation for an 0.1-eV infrared photon and a 5000-eV (5-keV) X-ray.
Anonymous asked 10/15/2010 Why does electromagnetic radiation in the ultraviolet region represent a larger energy transition then does radiation in the infrared region?
Anonymous asked 10/13/2010 What is the net force on the block if it is moved 15 to the right of its equilibrium position? Hint: There is zero net force on the point where the two springs meet. This implies a relationship between the amounts the two springs stretch
Anonymous asked 10/10/2010 You have two springs that are identical except that spring 1 is stiffer than spring 2.On which spring is more work done if they are stretched using the same force?
Harshit Singhal asked 10/3/2010 What are the good/bad conductors of electricity in the following? (a)lime juice (b)distilled water (c)orange juice (d)tomato juice (e)vinegar (f)vegetable oil (g)glycerine
Anonymous asked 9/24/2010 Cite an instance in which your speed could be zero while your acceleration is nonzero?
