Answer:
The burnt coal is not lost but instead converted into other forms of energy such as fire which produces heat which is absorbed by other things and sound waves which release energy into the environment and are also absorbed.
Explanation:
The energy from the coal doesn't disappear, it just gets converted into other, less useful, forms of energy.
Answer:
buildings are made of stone,bricks or embedded into the ground can feel cooler thanks to the high "thermal mass"of this materials.
Answer:
Thunderstorm is a high-speed wind which accompanied by heavy-rain fall, lightening and thunder. Cyclones are low-pressure system with high wind speeds formed.
Answer:
No, there won't be a collision.
Explanation:
We will use the constant acceleration formulas to calculate,
v = u + a*t
0 = 25 + (-0.1)*t
t = 250 seconds (the time taken for the passenger train to stop)
v^2 = u^2 + 2*a*s
0 = (25)^2 + 2*(-0.1)*s
s = 3125 m (distance traveled by passenger train to stop)
If the distance traveled by freight train in 250 seconds is less than (3125-200=2925 m) than the collision will occur
Speed*time = distance
Distance = (15)*(250)
Distance = 3750 m
As the distance is way more, there won’t be a collision
The correct option is D.
Micheal Friday devised a wire which hanged down into a glass vessel that has a bar magnet secured at the bottom. He then filled the glass vessel with Mercury and connected the apparatus to a battery. This sent electricity through the wire, thus creating a magnetic field around it. This field interacted with the field around the magnet and cause the wire to rotate clock wisely.