Which of the following is true? group of answer choices
when objects produce heat energy, they always produce sound energy, too.
when objects produce heat energy, the heat energy always turns into mechanical energy.
when objects produce light energy, they sometimes produce heat energy, too. when objects produce light energy, the light energy always turns into electrical energy.

The chemical bubbles

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. this makes plastics which are important also to people but sometimes it lead to harmful environmental effects such as global warming if these plastics are burned.

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m