Answer:
do you mean before we used fossil fuels? steam.before steam? fire was used for like ...125,000 years ago. we were not smart back then but we were smart enough.
Explanation:
The charge of a nucleus can change from positive to negative.
Answer:
Ensure each member of the audience can see and read the aid.
Explanation:
If Adam is pulling with a pulling force of 120N, and the nets pulling force is 200N, and they are both going north, then that means that Krystal would have a a pulling force of 80N north, as 200N- 120N is 80N. She would be pulling north because she is on the same side as Adam, helping to pull the sled upwards.
-Hope this helps! xo
Answer:
The parents and offspring all have phenotype ww. That leaves 100% probability of short wings and 0% long wings.
Explanation:
If long wings are a dominant trait, that means short wings are recessive. If two short winged flies are crossed, each of their phenotypes are ww. Therefore, each of their offspring also have phenotype ww, or short wings.