I'm doing something for science but i'm not sure how to answer these questions. why are yeti products so popular and useful? what is the best way to warm up when coming in from the cold? why do you think people turn on ceiling fans during the middle of winter when they have a heater on?

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential