What is the number of significant digits in the measurement 104.100 m?

6

6 significant digits

Explanation:

Number of significant digits of a number are the number of digits that carry a relevant contribution to the measurement.

For the case above;

104.100

rule - all digits to the right of the decimal of any number equal or greater than 1 will count as a significant digit.

104.100 --- .100 ( the three digits counts)

And since the the digits to the left are none zero digits, so they all count as significant digits.

104.100 --- 104 ( the three digits counts)

The total number of significant digits,

Since all the digits of the number 104.100 will count as a significant digit.

The number of significant digits is equal to the number of digits in the number.

N = 6

6 significant digits

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.