An object starts at a point +15m goes 20m toward +X direction in 4s then suddenly changes its direction to the opposite and covers 45m in 5s. A. Where is the object after the first 4s (position)?
B. What total distance did it travel?
C. What was its total displacement?
D. What was its average velocity for the entire trip?

3is a crest4 is a trough 2 is the amplitude 1 is the wavelength

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

Iwould think it is temperature, silica, oxides (gases)