A trumpet is usually mostly brass, a metal. Metals are conductors, so... By deduction a trumpet is a conductor. You can easily test this if you have access to a trumpet and a multimeter. Use the "ohms" scale of the multimeter...
Yes, what is given above is right. Trumpet is a good conductor of heat.
insulator.
It is an insulator
insulator
is a pen a insulator of conductor
is water conductor or insulator
is water conductor or insulator
Plastic is an electrical and thermal insulator.
an insulator. that's why it's used in building
bowl is conductor
Steel is a conductor and not an insulator.