Explanation:
Because of two reasons. First, the effects of air drag are often small when dealing with falling balls and rolling carts (a staple of intro physics labs). Second, calculating the motion of an object with air resistance is really difficult, because the drag force increases with velocity—it's non-constant. The normal equations in your physics course are created with the assumption of constant acceleration and constant forces.
Solar cells are classified into first, second and third generation cells. The first generation cells—also called conventional, traditional or wafer-based cells—are made of crystalline silicon<span>, the commercially predominant PV technology, that includes materials such as </span>polysilicon <span>and mono crystalline </span>silicon<span>.</span>
Answer:
Explanation:
a ) Time period T = 2 s
Angular velocity ω = 2π / T
= 2π / 2 = 3.14 rad /s
Initial moment of inertia I₁ = 200 + mr²
= 200 + 25 x 2.5²
=356.25
Final moment of inertia
I₂ = 200 + 25 X 1.5 X 1.5
= 256.25
b ) We apply law of conservation of momentum
I₁ X ω₁ = I₂ X ω₂
ω₂ = I₁ X ω₁ / I₂
Putting the values
ω₂ = 4.365 rad s⁻¹
c ) Increase in rotational kinetic energy
=1/2 I₂ X ω₂² - 1/2 I₁ X ω₁²
.5 X 256.25 X 4.365² - .5 X 356.25 X 3.14²
= 684.95 J
This energy comes from work done against the centripetal pseudo -force.
Answer:
5.98 m
Explanation:
= 11.15*4.6²/(4π²) = 5.98 m
The hot immediately increase the temperature of the cold water until they both reach equilibrium state.
