Answer:
1: an object will stay still until acted on by another force
2: acceleration of an object depends on the mass of the object and the force applied
3: for every action there is an equal and opposite reaction
The total positive charge on a copper penny is <u>1.36×10⁵C.</u>
One gram molecular weight of an element contains Avogadro number of independent entities. The atomic weight of Copper is 63.546.
Therefore 63.546 g of Copper contains 6.023×10²³atoms of copper.Calculate the number of atoms N in 3.1 g of copper in the penny.
The atomic number Z of copper is 29. Atomic number is equal to the number of protons present in the nucleus of the atom. Thus, a copper atom has 29 protons. Each proton has a charge e equal to 1.6×10⁻¹⁹C.
Therefore the total charge Q on the penny is given by,
Substitute 2.938×10²²for N, 29 for Z and 1.6×10⁻¹⁹C for e.
The total positive charge on a copper penny is <u>1.36×10⁵C.</u>
Answer:
The momentum of the two-block system is 18 kg-m/s
Explanation:
It is given that,
Mass of block A,
Mass of block B,
Velocity of block A,
Velocity of block B, (it is moving in opposite direction)
We need to find the momentum of two block system. It is given by the product of mass and velocity for both blocks i.e.
p = -18 kg-m/s
So, the momentum of two block system is 18 kg-m/s. Hence, this is the required solution.