Answer:a
Explanation:
We have to lift the load two loads up one story, so energy required is
let m be the mass of each load and h is the height of each story
Energy
Here energy gained is the potential energy which depends upon the datum(floor).
For lifting one load up one story
Energy required
thus is half of
So option a is correct
Answer: because the air currents move upwards so the hot air fills up the whole room. Similarly if the air conditioner is placed neer the ceiling because it gives cool air
Answer:
In a magnet, the domains all point in the same direction; in an ordinary piece of metal, they're all jumbled up.
Explanation:
In a magnet, the domains all point toward the north pole; in an ordinary piece of metal, they all point to the south pole.
Side note:
Hope this helps!
Please give Brainliest!
Answer:
the radius of the earth in himalayan region is greater than terai reagion. therefore, the value of 'g' at the poles is greater than the value of g at the equator. 12
Explanation:
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Answer: The box was moving with a velocity of 0.256m/s when it hit the spring
Explanation: Please see the attachments below