Answer:
F=523712 N
Explanation:
density=mass/volume
and shape is cubic so
volume=(4)^3
volume=64 m^3
mass=835*64
mass=53440 Kg
Hydrostatic force=53440*9.8=523712 N
Answer:30 cm
Explanation:
Given
object distance 
focal length of concave mirror 
height of object 
Using mirror formula




and magnification is



So height of object is same as of object .
Position :image is formed at the spot where object is placed.
Answer:
Acceleration = Force/Mass
Explanation:
Answer:
The amount of energy released by the earthquake in joules is 4.4×10^12 J.
Explanation:
As, we have given the magnitude,
M = 2/3 Log E/Eo
where E is the amount of energy released by the earthquake in joules and Eo=10^4.4 is the assigned minimal measure released by an earthquake.
As, the magnitude is given which is 5.5 then put it in the above equation,
5.5 = 2/3 Log E/Eo
Log E/Eo = 5.5×3 / 2
Log E/Eo = 8.25
Now, we will find the amount of energy released by an earthquake:
Log E/Eo = 8.25
Taking antilog,
E/Eo = 10^8.25
But Eo is given which is Eo = 10^4.4
E/(10^4.4) = 10^8.25
E = 10^8.25 × 10^4.4
E = 4.4×10^12 J.
1. Is 49.5
2. Is 8.6
4. Is 6.6
Wait I’m not sure