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Chapter 9: Problem 11

How is it possible to have a collision between objects that don't ever touch? Give an example of such a collision.

Short Answer

Expert verified
A collision, in the context of physics, can occur without physical contact. This is true in quantum physics where particles interact through forces like gravity and electromagnetism. An example is the interaction between electron clouds of atoms, they don't physically touch but their motions change due to electromagnetic fields.

Step by step solution

01

Understand Quantum Physics

In quantum physics, particles don鈥檛 need to collide in a traditional sense to interact. They can affect each other through forces like gravity and electromagnetism. Particles can communicate their presence to others without physical contact.
02

Particle Interaction

Two particles will 'know' about each other鈥檚 presence because they exist in a mutual gravitational or electromagnetic field. In this context, a 'collision' does not mean the particles physically touch each other. Instead, it signifies an interaction between the particles that results in a change of their motions.
03

Example - Electron Clouds

An example of such a collision could be an interaction between electron clouds of atoms. Electrons do not need to touch each other - they respond to each other's presence due to their electromagnetic fields. This can lead to a change in their motion, effectively representing a type of collision.

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Most popular questions from this chapter

Model rocket motors are specified by giving the impulse they "provide, in \(\mathrm{N} \cdot \mathrm{s}\), over the entire time the rocket is firing. The table below shows the results of rocket-motor tests with different motors used to launch rockets of different masses. Determine two data-based quantities that, when plotted against each other, should give a straight line and whose slope should allow you to determine \(g .\) Plot the data, establish a best-fit line, and determine \(g\). Assume that the maximum height is much greater than the distance over which the rocket motor is firing, so you can neglect the latter. You're also neglecting air resistance- -but explain how that affects your experimentally determined value for \(g\). $$\begin{array}{|l|r|r|r|r|r|} \hline \text { Impulse, } J(\mathrm{N} \cdot \mathrm{s}) & 4.5 & 7.8 & 4.5 & 7.8 & 11 \\ \hline \begin{array}{l}\text { Rocket mass }(\mathrm{g}) \\ \text { (including motor) }\end{array} & 180 & 485 & 234 & 234 & 485 \\ \hline \begin{array}{l}\text { Maximum height } \\\\\text { achieved (m) }\end{array} & 22 & 13 & 19 & 51 & 23 \\\\\hline\end{array}$$

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