Answer:
<em>Angular displacement=68.25 rad</em>
Explanation:
<u>Circular Motion</u>
If the angular speed varies from ωo to ωf in a time t, then the angular acceleration is given by:
The angular displacement is given by:
The wheel decelerates from ωo=13.5 rad/s to ωf=6 rad/s in t=7 s, thus:
Thus, the angular displacement is:
Angular displacement=68.25 rad
Answer:
Mass of air is 594.66 kg
Explanation:
We have,
The density of air is
Dimension of the room is 4.50 m x 7.88 m x 13.0 m
Volume of the room is
The density of an object is given by mass per unit its volume. Its mathematical form is given by :
m is mass of air in a room
So, the mass of the air in a room is 594.66 kg.
'B' is the correct choice.
BUT ... the angle of incidence is not the angle between the light ray
and the mirror. It's the angle between the light ray and the NORMAL
to the mirror. The 'normal' is the line that's perpendicular to the mirror.
Answer:
B. 10.2 m/s
Explanation:
Centripetal acceleration is:
a = v² / r
Given a = 15 m/s² and r = 7 m:
15 m/s² = v² / (7 m)
v = 10.2 m/s
Answer:
3k mph
Explanation:
don't take my answer it is wrong