Question

Which of the following is typically part of the knowledge base of research and development scientists working on heating devices?(1 point)
Responses

marketing strategies
marketing strategies

substances and their properties
substances and their properties

engineering rules and principles
engineering rules and principles

sales projections

Answer 1

The typical part of the knowledge base of research and development scientists working on heating devices would be **substances and their properties** and **engineering rules and principles**. These are essential for understanding the materials involved and the technical aspects of designing and improving heating devices.

While marketing strategies and sales projections can be important for overall business strategy, they are not typically within the core knowledge base of R&D scientists focused on the technical development of products.

So, the most relevant response is:

- **substances and their properties**
- **engineering rules and principles**