The answer is (C) most tornadoes hit less then 110mph which is 180 km
Mass of the displaced material. In water it would be the mass of the water that the volume of the ball displaces.
Answer:
100 m/s
Explanation:
Let find the velocity components first
Fx = 100 * cos (37) = 79.86 m/s
Fy = 100 * sin (37) = 60.18 m/s
applying motion equations
assuming no acceleration in horizontal direction we can assure that the ending velocity component will still remain Fx = 79.86 m/s
- Vertical motion (upwards)
V² = U² +2as
= 60.18² + 2*(-10)*0
Fy = 60.18 m/s
Total speed = √(F²x+F²y) = 100 m /s
*** You can take the same answer considering the Energy
Answer:
Explanation:
Electric field E = 4 x 10⁷ V / m
Dielectric constant k = 24
capacitance of capacitor
C = kε₀ A / d
d = plate separation
A = plate area
C = .89 x 10⁻⁶
V / d = electric field
for minimum d , electric field will be maximum
V / d = 4 x 10⁷
1930 / d = 4 x 10⁷
d = 1930 / 4 x 10⁷
d = 482.5 x 10⁻⁷ m
= 48.25 x 10⁻⁶ m
C = kε₀ A / d
.89 x 10⁻⁶ = 24 ε₀ A / d
A = .89 x 10⁻⁶ X d / 24 ε₀
A = .89 x 10⁻⁶ X 48.25 x 10⁻⁶ / 24 x 8.85 x 10⁻¹²
= 42.9 / 212.4
= .2019 m²
Modern fireplaces use a CATALYTIC COMBUSTOR to burn exhaust gases.
A catalytic combustor is an attachment which allows exhaust gases to be chemically broken down to release more energy. This is how it is applicable to modern fireplaces.