# Search Results

1. Post

### B What about the electric field in a circuit with resistors?

I think you are way over complicating this. In circuit theory you only care about two things: voltage and current. Is it really so hard to...
Post by: Dale, Nov 16, 2017 at 9:25 PM in forum: General Physics
2. Post

### I Mass and constrained massless particles

There are at least two ways to work this problem. One is a simple classical approach and the other is fully quantum mechanical. The simple...
Post by: Dale, Nov 15, 2017 at 8:46 PM in forum: Special and General Relativity
3. Post

### I Gravitational potential energy and continuous matter

For continuous media you will be better off using a differential expression rather than an integral expression. In this case, the best one is:...
Post by: Dale, Nov 15, 2017 at 5:58 AM in forum: General Physics
4. Post

### A Can KE be reformulated using |v| instead of v^2?

The units don’t work out as written. However, since v is a vector over the reals then |v^2|=|v|^2
Post by: Dale, Nov 14, 2017 at 7:04 AM in forum: Classical Physics
5. Post

### I Time dilation again, Einstein or Resnick?

There is some evidence to support this https://arxiv.org/abs/physics/0207109
Post by: Dale, Nov 13, 2017 at 3:01 PM in forum: Special and General Relativity
6. Post

### B Real objective time clock/s?

Sure. I have done the same thing many times myself in the past. I understand the temptation. I just want the OP to be aware as he may be...
Post by: Dale, Nov 13, 2017 at 2:41 PM in forum: General Physics
7. Post

### I Duration of a fall

No. Remember that these equations are only valid in an inertial frame.
Post by: Dale, Nov 13, 2017 at 10:09 AM in forum: General Physics
8. Post

### B Real objective time clock/s?

They all measure objective time, but the smartphone one is probably the best since it should be updated with a network time standard.
Post by: Dale, Nov 12, 2017 at 5:49 PM in forum: General Physics
9. Post

### B Regular derivation on The Universal Law of Gravitation?

You can certainly multiply two proportionalities any time you feel like it. However, the square root of the resulting expression may no longer be...
Post by: Dale, Nov 12, 2017 at 11:12 AM in forum: Classical Physics
10. Post

### B Regular derivation on The Universal Law of Gravitation?

This step is wrong. You need one force law which obeys both proportionalities. The product you took does not obey either.
Post by: Dale, Nov 12, 2017 at 9:16 AM in forum: Classical Physics
11. Post

### I Gravity changes produced by a compressed and stretched spring

I agree, and if I recall correctly this is also discussed in the paper.
Post by: Dale, Nov 11, 2017 in forum: Special and General Relativity
12. Post

### I Gravity changes produced by a compressed and stretched spring

No. For spherical geometry (outside of the star) see the reference I posted
Post by: Dale, Nov 11, 2017 in forum: Special and General Relativity
13. Post

### I Gravity changes produced by a compressed and stretched spring

We are talking about relativistic effects on the gravity of a spring. The whole discussion is negligible. I personally would expect that the...
Post by: Dale, Nov 11, 2017 in forum: Special and General Relativity