Which of the following is true about light waves and sound waves?
A.
Sound waves and light waves travel at the same speed through different materials.

B.
Sound waves can move at different speeds, but light waves always move at the same speed.

C.
Light waves can move at different speeds, but sound waves always move at the same speed.

D.
They each travel at different speeds when moving through different materials.

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

How many atoms are there in 5.70 mol of mg

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption