Answer:
The PE of system changed from 17.40 joules to 0 joules
Explanation:
Here m= mass of block = 3.7 kg
g= gravitational acceleration = 9.8 m/sec2
h= Height = 0.48 m
Potential energy at point A
PE= mgh = 3.7 × 9.8 × 0.48= 17.40 j
At point B 0.48 m below on ground
PE = mgh =3.7 × 9.8 × 0 = 0
Answer:
J=0.211kg.m/s
Explanation:
The impulse-momentum theorem states:
The velocity before the impact is given by:
For the velocity after the impact:
so:
Answer: C - carbon
Explanation:
Carbon dioxide (CO2) turns lime water milky due to the formation of insoluble calcium carbonate, CaCO3. Sulphur dioxide (SO2) also does the same, but slowly, as it reacts with calcium hydroxide to form insoluble calcium sulphite.
The physical evidence contain carbon elements
Answer:
Frequent shallow earthquakes
Explanation:
Shear is the response of a rock to deformation usually by compressive stress and forms particular textures.
During an earthquake when the earth shakes it produces a super shear earthquake in which the propagation of the rupture along the fault surface occurs at speeds in excess of the seismic shear wave (S-wave) velocity.
The mechanisms of shearing depend on the pressure and temperature of the rock and on the rate of shear which the rock is subjected to.
Answer:
They have two poles.
Explanation:
All magnets have two poles, even in nature.