How did the Atomists describe fire?
How did atomists describe fire? a. They described it as an original substance and they concluded that fire could change into all other elements and substances while coming through the universe from top to bottom.
What does Schödinger say electrons really are?
What does Schödinger say electrons really are? He says they are really waves. In Schrodingers model, he trys to describe the region in space, or orbitals, where electrons are most likey to be found.
Why was Dalton’s theory a modern theory?
Although two centuries old, Dalton’s atomic theory remains valid in modern chemical thought. 1) All matter is made of atoms. Atoms are indivisible and indestructible. 3) Compounds are formed by a combination of two or more different kinds of atoms.
What was wrong with Rutherford’s model Why didn’t folks accept it?
The main problem with Rutherford’s model was that he couldn’t explain why negatively charged electrons remain in orbit when they should instantly fall into the positively charged nucleus. This problem would be solved by Niels Bohr in 1913 (discussed in Chapter 10).
What did Schrödinger prove?
Assuming that matter (e.g., electrons) could be regarded as both particles and waves, in 1926 Erwin Schrödinger formulated a wave equation that accurately calculated the energy levels of electrons in atoms.
What are the functions of a fire alarm system?
In essence, a fire alarm system has four key functions: detect, alert, monitor, and control. These sophisticated systems use a network of devices, appliances, and control panels to carry out these four functions.
How does an initiation device work on a fire alarm?
When an initiation device is triggered, a signal is sent to the control panel and the control panel activates the notification devices. The status of the system is displayed on the control panel and allows you to see when an issue is detected and allows you to control it manually.
What happens when smoke enters a fire alarm circuit?
In case of fire when smoke enters the chamber, the current flow between two electrodes reduced due to ionize air. The drop in the current flow is used to trigger the sounder and alarm circuit.
How does a mass notification fire alarm system work?
Mass notification systems often extend the notification appliances of a standard fire alarm system to include PC based workstations, text-based digital signage, and a variety of remote notification options including email, text message, RSS feed , or IVR-based telephone text-to-speech messaging.