Answer:
1.c,2.c,3.a,4.d
Explanation:
the following answer are listed with there number
Earthquakes and volcanoes most commonly occur around plate boundaries because of the movement from the plate boundaries. The interactions between the plates by moving under, upon, or sliding against other boundaries may cause earthquakes and volcanoes.
Answer:
Explanation:
Moment of inertia of the rod = 1/12 m L²
m is mass of the rod and L is its length
= 1/2 x 2.3 x 2 x 2
= 4.6 kg m²
Moment of inertia of masses attached with the rod
= m₁ d² + m₂ d²
m₁ and m₂ are masses attached , and d is their distance from the axis of rotation
= 5.3 x 1² + 3.5 x 1²
= 8.8 kg m²
Total moment of inertia = 13.4 kg m²
B )
Rotational kinetic energy = 1/2 I ω²
I is total moment of inertia and ω is angular velocity
= .5 x 13.4 x 2²
= 26.8 J .
C )
when mass of rod is negligible , moment of inertia will be due to masses only
Total moment of inertia of masses
= 8.8 kg m²
D )
kinetic energy of the system
= .5 x 8.8 x 2²
= 17.6 J .
Answer:
287.19 kg.m²
Explanation:
Given that :
The mass M of the horizontal platform = 111 kg
The radius R of the uniform disk = 1.67 m
mass of the person standing 
= 64.7 kg
distance of the person standing 
= 1.15 m
mass of the dog 
= 25.7 kg
distance of the dog 
= 1.35 m
Considering the moment of inertia of the object in the system; the net moment of the inertia can be expressed as:
= 
= 
= 287.19 kg.m²
Since both the speeder and the state trooper are moving at the same
speed and same direction, therefore there would be no or zero Doppler shift.
In order to have a Doppler shift, the distance or separation between the
state trooper and the speeder must also be changing with time. Which in this
case, the distance remains the same or constant since they are moving alike.
This is just like what would occur if they were both standing still or parked.
<span>So this further means that the frequency of sound is the same as the
frequency heard by the speeder. Therefore the Doppler "shift" of the
frequency on the speeder would be
<u>zero. </u></span>
