That is the Sigma Symbol. It’s the addition of a sequence of numbers; the result is the sum of the total. if numbers are added sequentially from left to right, any intermediate result is a partial sum, prefix sum, or running total of the summation
Answer:
Mass of larger cart will be 0.0213 m /sec
Explanation:
We have given mass of small cart 
Initial velocity of small cart 
Mass of larger block 
Initial velocity of larger cart 
After the collision velocity of smaller cart 
Now according conservation of momentum




Answer:
Your age, because you never stop aging even when you're dead you still aging even though you're not alive.
Hope this helped
If the Earth's axis were closer to "straight up and down" than
the present 23.5°, then . . .
-- The areas around the north and south poles where the sun
can be up or down for more than 24 hours would be smaller.
-- The "Tropic Zone", between the Tropic of Cancer and the
Tropic of Capricorn, where it's possible for the sun to be
directly overhead, would be narrower.
-- There would be less difference, everywhere, between the
lengths of daylight on the "longest day" and the "shortest day"
of the year.
-- The seasons would be less extreme everywhere. There would
be less difference, everywhere, between the coldest part of the
Winter and the warmest part of the Summer.