pencil eraser
A metre stick.
A Dime!
1.5 cm
An object that is 100 cm long would typically be a meter stick or a tape measure. In the metric system, 100 cm is equivalent to 1 meter, which is a standard unit of length. Objects that are 100 cm long are commonly used for measuring and marking distances in various fields such as construction, engineering, and science.
1.9 cm cannot describe a mass. A mass must be 3-dimesional object, 1.9 cm givs the measure of only 1-dimension.
a tonne measures WEIGHT, whereas cm measures LENGTH, therefore you cant measure tonne to cm.
4*9 = 36 square cm
1 centimeter (1 cm) is a unit of length, measuring a one-dimensional distance. In contrast, 1 square centimeter (1 cm²) is a unit of area, representing a two-dimensional space that is 1 cm long and 1 cm wide. Essentially, 1 cm measures length, while 1 cm² measures the size of a surface.
a ruler measures 15 cm .1 cm =10 mm .THis means , 1 standard ruler measures 150 mm.
An example of an object that is approximately 50 cm long is a standard ruler, which typically measures 30 cm or 1 meter. Another example is a medium-sized laptop, which often has dimensions around 38 to 45 cm in width. Additionally, a soccer ball has a circumference of about 68-70 cm, making its diameter roughly 21-22 cm, which is much smaller than 50 cm.
A metre stick.
An object the size of a square centimeter could be a standard postage stamp, which typically measures about 2.5 cm by 3.5 cm, making a square centimeter roughly the size of a small area on that stamp. Alternatively, it could be the size of a typical sugar cube, which also has dimensions close to 1 cm on each side.
There are 100 cm by 300 cm
A pin head.
1 cm is approximately the width of a fingernail or the thickness of a 3/8 inch bolt.
A Dime!
The image distance (61 cm) is positive since the image is on the same side of the lens as the object. Using the lens formula (1/f = 1/d_o + 1/d_i), where d_o is the object distance (12 cm) and d_i is the image distance, the focal length (f) of the lens is approximately 15 cm.