Answer:
Explanation:
Given that,
We need to find the area of sector QRS. The formula for the area of a sector is given by :
QR = RS = r = 17 units
So,
So, the area of sector QRS is 
Answer:
the green house effect is gases such as carbon dioxide that trap the suns heat.
Explanation:
by trapping the sun's heat makes it warm enough to have life in it but ti much can cause global warming
spread of people, things, ideas, cultural practices, disease, technology, weather, and other factors from place to place.
Answer:
The correct option is: 2,250,000 kg
Explanation:
Given
: Area A = 1 ha (Hectare) = 10,000 m²
Bulk density = 1.5 Mg/m³ = 1.5 × 1000 kg/m³ = 1500 kg/m³ (∵ 1 Mg=1000 kg)
Depth of soil = 15 cm = 0.15 m (∵ 1 m = 100 cm)
Volume can be calculated by:
Volume = area × Depth = 10,000 m² × 0.15 m = 1500 m³
As we know, density = mass/ volume
Therefore, <u>Mass of soil</u> = Bulk density × volume = 1500 kg/m³ × 1500 m³ = 2,250,000 kg
