Answer:
Burning match represents exothermic reaction.
Explanation:
Exothermic reaction:These are the reaction which releases energy into the surroundings.
Endothermic reaction:These are the reaction which absorbs energy from the surroundings.
Burning of the match stick is an Exothermic reaction.This is because amount of energy required to burn the match is very less than of the energy given out by the match on burning.
Input Energy < Output Energy
Answer:
Mechanical, Heat, Chemical, Electrical Radiant, Nuclear, Wind and Sound are some.
Answer:
4 %
2 ) 3.42 %
Explanation:
Sensitivity requirement of 4 milligram means it is not sensitive below 4 milligram or can not measure below 4 milligram .
Given , 4 milligram is the maximum error possible .
Measured weight = 100 milligram
So percentage maximum potential error
= (4 / 100) x 100
4 %
2 )
As per measurement
weight of 6 milliliters of water
= 48.540 - 42.745 = 5.795 gram
6 milliliters of water should measure 6 grams
Deviation = 6 - 5.795 = - 0.205 gram.
Percentage of error =(.205 / 6 )x 100
= 3.42 %
Answer:
friction can be used to slow things down but it can also be harmful because it can cause fire to start
Vertical stairs :P: W = (20 N) * (6.0 m) * cos (0 degrees) = <span>120 Joules
At 45 degrees: W = (20.0 N) * (6.0 m) * cos (45 degrees) =
(20N) * 6m) * (</span><span>0.707106781) = 84.853 Joules</span>
