Holly has an unknown substance in a beaker. she wants to determine the relative ph of the unknown substance. she places a piece of blue litmus paper into the substance, and the litmus paper turns red. the substance in the beaker

Blue litmus paper turns red in the presence of an acid. Therefore, it can be assumed that the substance in the beaker is an acid.

Acids have a pH level of less than 7. Consequently, it can be assumed that the substance has a pH level less than 7.

the solar system used to have much dust particles option no d

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest