F=W=mg
12N(given)= m*9.8
m= 1.22 kg
Answer with Explanation:
The force of attraction between 2 charges of magnitude
separated by a distance 'r' is given by
where
is a constant known as permitivity of free space

Applying the given values in the above relation we get

Answer:
B) Aerosol
The particles from the pigeon droppings are likely to be transmitted from the air vents directly into Martyn's respiratory system
Answer:
The mass of the gold bar is 1,544 g
Explanation: