A. Thermometer is the weather instrument that has most improved the accuracy of weather forecasts over the past 40 years.
Answer:
Mineral
Explanation:
Mineral:-
- Mineral is defined as the naturally occurring inorganic solid which a very definite crystalline geometry and structure.
- All the minerals in the nature contain one or more than one element.
- Quartz which is a mineral is made up of silicon as well as oxygen atoms.
- Other examples of minerals are feldspar, mica, calcite, and amphibole.
<u>Hence, the answer to the problem is:- mineral.</u>
A) mixture because they are not chemically combined
Digital signals are more reliable than magnetic tapes in recording and transmitting information during a flight. Both are used in a Flight Data Recorder (FDR) for black boxes in airplanes. The magnetic tapes are used starting from the first flight of an aircraft up to this day. It is considered as an analog recorder and can easily be tampered. On the other hand, digital signals are automatically converted electric signals and recorded to the data recorder so it can't be easily tampered.