Answer:
position 2
Explanation:
the gravity from the ball to the floor had the most movement involved.
Answer: No change in mass
Explanation:
Beta-emission: In this process, a neutron gets converted into a proton and an electron. The electron is referred to as a beta-particle. The beta particle released carries a charge of -1 unit and has negligible mass.
General representation of an element is given as: 
Z= Atomic number
A = mass number
X = chemical symbol of element
Answer:
Explanation:
Average speed is defined as the ratio of total distance to the total time taken. It is a scalar quantity.
Average velocity is defined as the total displacement to the total time taken. It is a vector quantity.
They both are equal, if the motion is straight line.
So, every time it is not true.
Answer: option 1. thermal expansion and contraction.
The thermostat uses the thermal expansion and contraction of metals: when the metal expands it acts as a switch, a coiled ribbon expands and the electric circuit is off, then the current stops. When the temperatures decrease, the coiled ribbon contracts and the circuit is on, then the current starts to flow and the resistance starts to radiate heat.
the answer to this qustion is c friction force
