Q-12 Give two points of difference: Force –Weight 2
Q-13 Thunder and lightning both occur simultaneously but thunder is heard a few seconds
after lightning appears. Give a reason.
please answer me fast guyss
Answers
Answer:
Lightning can be seen before thunder is heard as light travels faster than sound. The speed of sound in air is just over 300m/s. ... The noise of thunder is caused by the rapid expansion of heating the air
State any two points of the difference between force and weight.
difference between force and weight are:
➭ mass is the quantity of matter in a body regardless of its volume or of any force acting on it.
➭ mass is always constant at any place and any time.
➭ mass is expressed as kilogram(kg),grams(g),and miligram(mg)
➭ mass is measured using a pen balance,a triple- beam balance,lever balance or electronic balance.
➭ scaler and base quantity.
\huge\tt\underline{weight}
weight
➭weight is the measurement of the gravitational force acting on an object.
➭ the weight of an object depends on the gravity at that time.
➭ weight is expressed in newton (N)
➭weight is balanced using a spring balance.
➭ vector and derived quantity.
THANKS
Thunder and lightning both occur simultaneously but thunder is heard a few seconds after lightning appears. Give a reason.
Answer - Answer:
The speed of light in air is 3 x 10 8 m/s. ... Since the speed of light is much more as compared to the speed of sound in air, lightning travels faster than the thunder. Hence, even though they occur at the same time, lightning is seen earlier than thunder can be heard.