The point on a pin has a diameter of about 1 * 10^-4 meters. If an atom has a diameter of 2 * 10^-9 meters, about how many atoms could fit across the diameter of the point of a pin?

1.0*10^-4

--------------
2.0*10^-9

= 0.5 * 10^5
= 50,000

To find out the number of atoms that could fit across the diameter of the point of a pin, we need to divide the diameter of the point of a pin by the diameter of an atom.

Diameter of the point of a pin = 1 * 10^-4 meters
Diameter of an atom = 2 * 10^-9 meters

Number of atoms across the diameter of the point of a pin = (diameter of the point of a pin) / (diameter of an atom)

Number of atoms across the diameter of the point of a pin = (1 * 10^-4) / (2 * 10^-9)

Simplifying the expression:

Number of atoms across the diameter of the point of a pin = (1/2) * (10^-4 / 10^-9)

Number of atoms across the diameter of the point of a pin = (1/2) * 10^5

Number of atoms across the diameter of the point of a pin = 50,000

Therefore, approximately 50,000 atoms could fit across the diameter of the point of a pin.

To determine how many atoms could fit across the diameter of the point of a pin, we can divide the diameter of the pin by the diameter of an atom.

Given:
Diameter of the pin = 1 * 10^-4 meters
Diameter of an atom = 2 * 10^-9 meters

To find the number of atoms that could fit across the diameter of the pin, we divide the diameter of the pin by the diameter of an atom:

Number of atoms = (Diameter of the pin) / (Diameter of an atom)
Number of atoms = (1 * 10^-4 meters) / (2 * 10^-9 meters)

To divide these values, we can simplify the calculation by converting both values to scientific notation with the same exponent:

Number of atoms = (1 * 10^-4) / (2 * 10^-9)
Number of atoms = (5 * 10^-5) / (10^-9)

Now, we can divide the numerator by the denominator by subtracting the exponents:

Number of atoms = 5 * 10^-5 / 10^-9
Number of atoms = 5 * (10^-5 - (-9))
Number of atoms = 5 * 10^4

Therefore, approximately 5 * 10^4 atoms could fit across the diameter of the point of a pin.