Answer:
<h2>compression</h2>
Explanation:
Such type of the longitudinal waves that causes compression during the travelling through the medium is called as compression. Generally, displacement of the medium takes place in this wave travelling conditions. There are many waves that are considered as longitudinal waves such as sound waves, seismic p-waves and some other. Waves have different types of properties that are changed due to different medium.
Explanation:
formation of compounds because the electric forces compel the atoms to attract each other and formed bonds which leads to the formation of chemical compounds. The attractive or repulsive interaction between any two charged bodies is known as an electric force so the attraction between two opposite charged atoms causes the formation of compounds so we can conclude that electric forces are important for the formation of compounds.
Never are fully correct but b would be most right
Fist you would put them in order and then cross one off from each side so like 4kg and 13kg and the last two that you have you would add the 4kg and the 6kg and divide by 2 to get the aswer of 5kg.
4kg+6kg=10kg
10kg/2kg=5kg