Physics/Expert Profile

Average Ratings

• Knowledgeability 9.86
• Clarity of Response 9.65
• Timeliness 9.91
• Politeness 9.92

• Number of Questions (in Past 24 Hours) 2
• Max Questions to be Asked (in 24 Hour Period) 10
• Total Questions (since joining AllExperts) 3505
• Volunteer Since 2005-01-20
• Prestige Points 44068

Recent Reviews from Users

Read More Comments

    K = Knowledgeability    C = Clarity of Response    T = Timeliness    P = Politeness

User	Date	K	C	T	P	Comments
kevin	11/24/09	10	10	10	10	thanks!
meme	11/21/09	10	10	10	10
Caitlin	11/20/09	10	10	10	10
Jonathan.Stahl	11/19/09	10	10	10	10	Thanks for the answer, it looks right!
Patrick	11/12/09	10	10	10	10	thankyou very much! Patrick

Recent Answers from Richard J. Raridon

2009-11-22 help please!:

First of all, if you release it at 0.2m down it's not going to go above 0.2m up. In your case, x is h. The total energy in the system is constant at all times. When you pull it down, all of the energy

2009-11-19 the "why exactly so?" for the nature of the gravitational force:

Nobody knows the mechanism. It's just a fundamental property of mass that there's an attractive force between any two masses. For two small masses the magnitude of the force can be hard to measure.

2009-11-13 Energy and Expanding Universe:

The law used to state that energy cannot be created or destroyed but can be changed in form. That's no longer true. Mass can disappear and energy is created. Energy can disappear and mass appear, as

2009-11-13 Energy and Expanding Universe:

It's not true that energy cannot be created or destroyed. That changed when fission was discovered in 1939. The universe is expanding because everything is moving further out, not that there is "more"

2009-11-08 What is magnetic force:

It's hard to describe what you can't see. You just have to visualize them. There is a magnetic field surrounding the pole of every magnet. They come in pairs as they have never discovered a magnetic