The density of a material depends on both its mass (amount of matter), which is usually provided in grams (g), and its volume (space occupied), which is provided in units such as cubic centimeters cm3. Moreover, to find how dense the material is, take the mass and divide it into the volume. The process for finding the density of the block of wood is shown below:

$d = \frac{m}{v}$

$d = \frac{46 g}{64 cm3}$

$d = 0.718 g/cm3$

This means the density is 0.71g/cm3 and this can be rounded to 0.72 g/cm3

3 0

2 years ago

Which of the following is not a part of every scientific investigation?

Dmitry_Shevchenko [17]

Answer:

the correct answer is Group of answer choices

6 0

3 years ago

The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate parameter of 8.1% per day. f

Elanso [62]

The general equation for radioactive decay is;
N = N₀e^(-λt)
x - decay constant (λ) - rate of decay
t- time
N - amount remaining after t days , since we are calculating the half life, amount of time it takes for the substance to to be half its original value, its N₀/2
N₀ - amount initially present
substituting the values
N₀/2 = N₀e^(-0.081t)
0.5 = e^(-0.081t)
ln (0.5) = -0.081t
-0.693 = -0.081t
t = 0.693 / 0.081
= 8.55
half life of substance is 8.55 days

5 0

2 years ago