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From: DHowell.ES@Xerox.ARPA
Newsgroups: net.physics
Subject: A question about mass and energy
Message-ID: <378@sri-arpa.ARPA>
Date: Wed, 10-Jul-85 15:50:25 EDT
Article-I.D.: sri-arpa.378
Posted: Wed Jul 10 15:50:25 1985
Date-Received: Sat, 13-Jul-85 11:29:20 EDT
Lines: 13

Here's a question I've had in my mind that I haven't resolved yet.

In physics I was taught that energy is not a substance and does not have
a definite location.

However relativity says that energy is/has mass.  Mass does have a
definite location.

If energy is mass, how can it be and not be in a definite location?  If
energy has mass, where is the gravitational field caused by that mass if
it has no definite location?

Dan