Answer:
<h3>D. A coal burning power plant</h3><h3 />
Explanation:
it is a coal power plant , nuclear power is economical and does not fluctuate as much as wind or solar power.
Unlike coal, it is considered clean in terms of the amount of greenhouse gas emissions produced by the power plant itself, although uranium mining and processing are not without risks and environmental impact
Explanation:
Iwan ko sayo hahahahahhahaa
Let h = the thickness of ice, m.
Because the ice covers an area of 0.65 m², the volume of ice is
V = 0.65h m³
The density of ice is 917 kg/m³, therefore the mass of ice is
m = (917 kg/m³)*(0.65h m³) = 596.05h kg
The latent heat of fusion of ice is 3.35 x 10⁵ J/kg, therefore the heat required to melt the ice is
Q₁ = (596.05h kg)*(3.35 x 10⁵ J/kg) = 2h x 10⁸ J
The electric heater supplies heat at 12 V, 23 A for 4.3 minutes to melt the ice.
Therefore the heat provided is
Q₂ = (12 V)*(23 A)*(4.3*60 s) = 71208 J
Because Q₁ = Q₂, obtain
2h x 10⁸ = 71208
h = 356 x 10⁻⁶ m = 356 x 10⁻³ mm = 0.356 mm
Answer: 0.356 mm
The work involved in lifting the heavy object can be describes as:
Work required to lift the object to the same height is independent of the path by which it is taken there.The machines such as ramps do not decrease the work. These help in making our work easier. Due to ramp, we have to push to a longer distance but less effort i.e. less force is required to do the same amount of work.
The force to be exerted in absence of inclined plane is mg ( weight of the object). On the other hand, the force exerted on an inclined plane is reduced by sinθ (F=mg sinθ) value of sinθ lies between 0 and 1.
Hence, it becomes easier to lift a heavy object using ramp.