Always wear protected face gear and body gear, make sure you have an adult present and a fire extinguisher
Answer:
option 4
Explanation:
Light's velocity in air ( 3 × 10^8 m/s ) is much greater than sound's velocity in air ( 343 m/s )
Hence due to difference in velocities , during lightning light is seen first & sound is heard later
The time of motion of the 5 kg object will be the same as 1 kg since both objects are dropped from the same height.
The given parameters;
<em>Mass of the first object, m1 = 1 kg</em>
<em>Mass of the second object, m2 = 5 kg</em>
The final velocity of the objects during the downward motion is calculated as follows;
![v_f = v_0 + gt\\\\v_f = 0 + gt\\\\\v_f = gt](https://tex.z-dn.net/?f=v_f%20%3D%20v_0%20%2B%20gt%5C%5C%5C%5Cv_f%20%3D%200%20%2B%20gt%5C%5C%5C%5C%5Cv_f%20%3D%20gt)
The time of motion of the object from the given height is calculated as;
![h = v_0 t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\gt^2 = 2h\\\\t^2 = \frac{2h}{g} \\\\t = \sqrt{\frac{2h}{g} }](https://tex.z-dn.net/?f=h%20%3D%20v_0%20t%20%2B%20%5Cfrac%7B1%7D%7B2%7D%20gt%5E2%5C%5C%5C%5Ch%20%3D%200%20%2B%20%5Cfrac%7B1%7D%7B2%7D%20gt%5E2%5C%5C%5C%5Ch%20%3D%20%5Cfrac%7B1%7D%7B2%7D%20gt%5E2%5C%5C%5C%5Cgt%5E2%20%3D%202h%5C%5C%5C%5Ct%5E2%20%3D%20%5Cfrac%7B2h%7D%7Bg%7D%20%5C%5C%5C%5Ct%20%3D%20%5Csqrt%7B%5Cfrac%7B2h%7D%7Bg%7D%20%7D)
The time of motion of each object is independent of mass of the object.
Thus, the time of motion of the 5 kg object will be the same as 1 kg since both objects are dropped from the same height.
Learn more about time of motion here: brainly.com/question/2364404
because water is loosely packed but when it is cold it becomes closely packed in order to form ice and thus the force attraction between them also increase.
Answer:
When energy contained in coal is turned into heat, and then into electrical energy. As boiling water heated by the burning coal is cooled, steam forges from these cone-shaped cooling towers.