Answer:
A
Explanation: A is a example of Air resistance force, which is a contact force.
Answer:51.44 units
Explanation:
Given
x component of vector is 
y component of vector is 
so position vector is

Magnitude of vector is


|r|=51.44 units
Direction

vector is in 2nd quadrant thus


Answer:
16 male students, 11 female students
The actual answer is B) Chlorine
According to the Bohr Model diagram, the atom has seventeen electrons. This makes it Chlorine.
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The atomic number of an element is the number of protons the element has, so the element with the atomic number 55 has 55 protons.