Brandon is planning an investigation to test the buoyancy of different gases. Which of the following references would NOT be helpful to Brandon in planning his investigation?

Which would not reduce the amount of green house gasses in the air

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?