1. if during a 60 second jog, my average velocity is 5 m/s, how far from my starting point do i end up(what is my displacement ) in meters 2. an hippo falls out of a plane, it accelerates towards the ground at a rate of 10 m/s^2. The hippos mass is 5,000kg. What is the net force being exerted on the hippo as it falls (In newtons)

3. i throw a ball straight up with a force of 5N, gravity then exerts a force of 2.5N down on the ball. The ball's mass is 0.5kg, what is the acceleration of the ball

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.