Answer:
Measure the volume of water poured into a graduated cylinder, then place the object in the water and remeasure the volume. The difference between the two volume measurements is the volume of the object. Now simply divide the mass by the volume to calculate the density of the object.
Hello!
We have the following data:
Area (
A) = 50 square feet
Mass (
m) = 8.5 ounces
Density (
d) = 2.70 g/cm³
Volume (
V) = ?
Thickness (
T) =? (in mm)
To move on, we must transform the area of 50 ft² in cm², let's see:
1 ft² ------- 929,0304 cm²
50 ft² -----
A

In the same way, we will convert the mass of 8.5 oz in grams, see:
1 oz -------- 28,3495 g
8,5 oz -------
m

Knowing that the density is 2.70 g/cm³ and the mass is 240.97075 g, we will find the volume, applying the data in the density formula we have:



The statement wants to find the thickness of the packaging, for this we have some important data, such as: V (volume) = 89,25 cm³ and Area (A) = 46451,52 cm² and T (thickness) =? (in mm)
In the calculations of Costs in Surface Treatment of a part within the flat geometry, we will use the following formula:





We will convert to millimeters, going through a decimal place on the right

Hope this helps! :))
The correct answer is letter (d.) Mg, Ca, Sr, Ba
These four elements are found in Group 2 of the periodic table, which are alkaline metals, therefore they have the very similar properties because of their 2 valence electrons, which makes them reactive.
According to Newton's first law of motion, it takes an unbalanced force to move an object at rest.
I hope this helps :)