Which of the following values cannot be measured using si units of length density temperature or all can be measured

The correct answer is "All can be measured".

There are seven SI basic units (the kilogram, the second, the kelvin, the ampere, the mole, the candela, the meter).

So from the given options length can be measured by meter (m^3), for density kilogram per cubic meter(kg/m^3),  and for temperature is kelvins(K).

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.