Recent content by Herman Trivilino

I don't think so.

Are you okay with an introductory notion of torque as leverage? Think about using a pry bar. It's a lever. As you operate the lever the further from the pivot point you push or pull on the pry bar, the greater the effect. That is, the greater the torque. The torque increases in proportion to the...

I don't know. Einstein was aware that relativity had its shortcomings. It ignored quanum theory and it didn't have a lot of experimental verification. Of course the latter is no longer an issue.

Einstein himself held the position that a shortcoming of relativity is that it ignored quantum physics.

Suppose you are standing on a skateboard and you propel yourself across the room by pushing on the wall with enough force to acquire 200 J of kinetic energy. Did the wall do 200 J of work on you? Did your body expend 200 J of energy? Does this all add up for you?

The passage of time is not defined in that case. That's different from saying it's zero.

When walking in the opposite direction would you need to provide work to reduce rotational energy?

It's not. It's further from Earth's center. But sea level has an altitude of zero in both locations. If you walked from the equator to the pole would work be done on you to slow you down?

Could you elaborate on this a bit, please? If the string wires carry dc, I don't understand how these "switching current sources" can do this.

The speed of an object depends on how fast the observer is moving. It's not absolute. If an object is moving at nearly the speed of light relative to you, then you are moving at nearly the speed of light relative to it. Do you think that your mass changes because an object moves at nearly the...

Are we still trying to address the OP's query?

It doesn't exist because there is no such thing as negative mass. The electric force is can be either attractive or repulsive but gravity is attractive only. Thus we need two kinds of electric charge (positive and negative) but only one kind of mass (positive).

So it's too far away to observe but it's within our observable universe? How are you defining observable universe?

But once you've done that analysis you have the opportunity to develop an understanding that makes those problems intuitive. I think that's the point of the OP's professor's advice. Start developing the physical intuition during the introductory courses when it's easier. Waiting until the...

It's a property assigned by humans, measured by humans using precise operational definitions defined by humans. It originated as way to make the exchange of goods more fair. Maybe there's some deeper mechanism that gives rise to this property?