Question

what is the best form of measurement to find the distance a car travels in the * options: millimeters, kilometers, inches, mm
which of the following is equivalent to 4.5 m? * options: 450 km, 450 cm, 0.45 km, 45 cm
what is the best form of measurement to find the mass of a chemical added to a beaker? * options: kg

Explanation:

First Sub - Question (Which is equivalent to 4.5 m?):

Step1: Recall unit conversion for length

We know that \(1\space m = 100\space cm\). To convert meters to centimeters, we multiply the number of meters by 100.

Step2: Convert 4.5 m to cm

Using the conversion factor, \(4.5\space m\times100=\frac{45}{10}\space m\times100 = 450\space cm\). Let's check other options:

• \(1\space km = 1000\space m\), so \(4.5\space m=\frac{4.5}{1000}\space km = 0.0045\space km

eq450\space km\) or \(0.45\space km\).

• \(45\space cm\) is \(0.45\space m

eq4.5\space m\).

The mass of a chemical added to a beaker is usually a small quantity. Kilograms (kg) are used for larger masses. Units like grams (g) or milligrams (mg) are more suitable for small amounts of chemicals, but among the given option (assuming the option is related to mass units and kg is an option, but typically for small chemical amounts, grams are better, but if kg is the only mass - related option here, we consider the context. However, if we assume the options are about mass units and kg is one, and the other options are length units (from the first part), then kg is the mass unit here.

Answer:

450 cm

Second Sub - Question (What is the best form of measurement to find the mass of a chemical added to a beaker?):