Answer:
Explanation:
In space, rockets zoom around with no air to push against. ... When a rocket shoots fuel out one end, this propels the rocket forward — no air is required. NASA says this principle is easy to observe on Earth. If you stand on a skateboard and throw a bowling ball forward, that force will push you and the skateboard back.
Answer:
I think it's electrical energy
Answer: The speed reading would increase each second by 20m/s
Explanation:
Acceleration is the change in velocity per unit change in time.
Acceleration = velocity/time
∆v = a∆t
Given a = g = 20m/s/s (acceleration due to gravity)
∆t = 1 sec
∆v = 20m/s/s × 1s
∆v = 20m/s
Therefore, the speed reading would increase each second by 20m/s
Mechanical Energy transforms into Thermal due to the moving parts rubbing on eachother creating heat and friction.
Answer:
4.416 W/m²
Explanation:
Malus' law is given mathematically as
I = I₀ cos² θ
For the first polarizer, θ = 60°
I₁ = I₀ cos² 60°
I₁ = I₀ (0.5)² = 0.25I₀
For the second polarizer, θ = 20°
I₂ = I₁ cos² 20°
I₂ = I₁ (0.9397)² = 0.883 I₁
I₂ = 0.883 × 0.25I₀ = 0.2208 I₀
Note that
I₀ = 20 W/m²
I₂ = 0.2208 × 20 = 4.416 W/m²
Hope this Helps!!!
