Answer:
a
Explanation:
the kinetic energy decreases which makes the molecules bond together, that makes them not be able to move much
Answer:
115.3 is the direction of the vector. Just learned some physics to get this answer over the past 3 hrs
1 second - 32m
2 second - 84m
3 second - 156m
4 second - 248m
Hope this helps
use the formula: v^2=(3kT)/m
Where:
<em>v is the velocity of a molecule</em>
<em>k is the Boltzmann constant (1.38064852e-23 J/K)</em>
<em>T is the temperature of the molecule in the air</em>
<em>m is the mass of the molecule</em>
For an H2 molecule at 20.0°C (293 K):
v^2 = 3 × 1.38e-23 J/K × 293 K / (2.00 u × 1.66e-27 kg/u)
v^2 = 3.65e+6 m^2/s^2
v = 1.91e+3 m/s
For an O2 molecule at same temp.:
v^2 = 3 × 1.38e-23 J/K × 293 K / (32.00 u × 1.66e-27 kg/u)
v^2 = 2.28e+5 m^2/s^2
v = 478 m/s
Therefore, the ratio of H2:O2 velocities is:
1.91e+3 / 478 = 4.00
Answer:
PART A)
L = 97.4 dB
PART B)
PART C)
L = 67.9 dB
Explanation:
PART A)
level of sound is given as
now we have
PART B)
Since source is a spherical source
so here the intensity of sound is inversely depends on the square of the distance from the source
PART C)
level of sound is given as
now we have
