For example, "L" R

For example, "L" R

Much larger than l, much larger than R

What is "Δ T" in physical symbols?

There are two meanings of △ T: △ t is the change of time, and △ t = the change of temperature from the end of t to the beginning of T

In the international system of units, the unit of time is___ The unit of length is___ In the experiment, the tool for measuring time is___ The tool for measuring length is____
the sooner the better

Seconds
rice
Stopwatch
a scale

What is the tool for measuring time______ In the international system of units, the primary unit of time is______ ．

The tool for measuring time is stopwatch, also known as stopwatch; in the international system of units, the basic unit of time is second, and the commonly used time units are hour and minute