Answer:
A kilogram describes how much matter an object contains
Friction is the force that helps stop objects from sliding forever and ever. soccer players use friction to push themselves forward with their feet to run and start accelerating. if they want to stop, they can put their feet on the ground roughly to slow them down immediately from the rough terrain and the surface of their shoes
Answer:
B) Electrons and protons
Explanation:
Each proton has a positive charge, and each electron has a negative charge. If the atom is electrically neutral, there must be the same number of electrons and protons.
A) and C) are wrong. Neutrons have no charge, so they can't counteract that of the protons or the electrons.
D) is wrong. The atomic number is the number of protons, and the mass number is the number of protons plus neutrons. The neutrons can't counteract the charge of the protons,
Answer:
they are the same
Explanation:
change in speed is 10km/h for both, and the time is the same for both. they have the same acceleration.
D When it is stretched ready to shoot at the wall