First, we calculate for the total volume of aluminum. The
volume of a cube is:
V = s * s * s = s^3
V = (2.70 cm)^3
V = 19.683 cm^3
Assuming atmospheric temperature, the density of aluminum is
about 2.70 g / cm^3. Therefore the equivalent mass of aluminum is:
m = 19.683 cm^3 * 2.70 g / cm^3
m = 53.1441 g
The molar mass of aluminum is 27 g / mol. Therefore the
number of moles is:
n = 53.1441 g / (27 g / mol)
n = 1.9683 mol
Given the number of moles, we can calculate for the number of
atoms using Avogadro’s number.
atoms = 1.9683 mol * (6.022 * 10^23 atoms / mol)
<span>atoms = 11.85 * 10^23 atoms (ANSWER)</span>
The kinematic relations allow finding that the answers for the velocity and the position of the car in a time of 2 s. are:
- The velocity is v = 7 m / s
Kinematics studies the movement of bodies giving relationships between the position, velocity and acceleration of the body
They indicate that the initial velocity is v₀ = 1 m/s, that the car has an acceleration of a = 3 m/s² and asks about the position and velocity after a time of t = 2s
Let's used the kinematics relation
v = v₀ + a t
v = 1 + 3 2
v = 7 m / s
We look for the position
x = v₀ t + ½ a t²
x = 1 2 + ½ 3 2²
x = 8m
In conclusion, using the kinematics relations we can find the answers for the speed and the position of the car in a time of 2 S. They are
- The velocity is v = 7 m / s
Learn more here: brainly.com/question/11298125
Answer:
1ft per second
Explanation:
Physics is on my side!!!!!!!!!!
Answer:
20 hz - 20khz is the audible sound wave for humans
