Answer:
48.6 g
Explanation:
Given data:
Length of one side = 3 cm
Density of cube = 8.1 g/cm³
Mass of cube = ?
Solution:
First of all we will calculate the volume of cube.
V = length × height × width
V = 3 cm × 3cm× 3cm
V = 27cm³
Now we will determine the mass by using density formula.
d = m/v
d = density
m = mass
v = volume
8.1 g/cm³ = m/ 27 cm³
m = 8.1 g/cm³ ×27 cm³
m = 48.6 g
Answer:
False
Explanation:
A liquid has a definite shape and takes on the volume of its container. A gas has both the shape and the volume of its container. The particles in a gas cannot be compressed into a smaller volume. Liquids tend to contract when heated.
Hope this helps
Answer: The answer is 6.78 grams.
Explanation: The equation used for solving this type of problems is:
where, 
is the initial amount of radioactive substance, N is the remaining amount and n is the number of half lives.
Number of half lives is calculated on dividing the given time by the half life.
n = time/half life
Time is given as 48.0 hours and the half life is given as 4.536 days. let's make the units same and for this let's convert the half life from days to hours.
= 108.864 hours
So, 
= 0.441
Since 5.00 g is the required amount when the radioactive substance is delivered to the scientist, it would be the final amount that is N. We need to calculate the initial amount. Let's plug in the values in the equation:
= 6.78 g
So, 6.78 g of the radioactive substance needs to be ordered.
The wawelenght. The wavelength of visible light determines the color that the light appears. A light with the longest wavelength appears red, and a light with the shortest wavelength appears violet. In between are the wavelengths of all the other colors of light.
