Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat
Object weight varues on cellestial bodies due to the acceleration due to gravity acting on the body. the acc due to gravuty depend on the mass and radius of the cellestial body. Thus the weight varies on cellestian bodies
Answer:
Explanation:
a ) Distance travelled by them = 3 / 4 x 2π R where R is radius of the circular path .
= .75 x 2 x 3.14 x 2.08
= 9.8 km approx
b )
Displacement = shortest distance between final and initial position
= √2 R
= 1.414 x 2.08
= 2.94 km approx
c ) The direction of displacement is towards north east
so the direction is 45° north of east .
A - 10 watts
D - 13-1/3 watts
B - 20 watts
C - 40 watts
Power = (work done) / (time to do it)