Answers: Disposable hand warmers turn up the heat in your mittens by means of an exothermic reaction that, in essence, just creates rust. Each pouch typically contains iron powder, salt, water, an absorbent material, and activated carbon. -or- The chemical reaction that takes place in hand warmers is exothermic, meaning it releases excess energy as heat. That's why you can mix a few chemicals to warm your hands!
Comment below if this helped! Brainliest would be great!
Explanation:
part A
series. combination of resistance
R=R1+R2
given R1=25 and R2=15
R=25+15
R=40
partB
parallel combination of resistance
given R1=220 and R2=430
R=1/R1 +1/R2
R=1/220+1/430
R=13/1892
Answer:
A. Scientists use seismic computer models to measure the atmospheric conditions above the Earth's crust
Explanation:
why would use atmosphere to study the layers of earth? dont think thats possible
Answer:
F = 6666.7 N
Explanation:
Given that,
Mass of a chip, m = 0.1 mg
Initial speed, u = 0
Final speed,
Time of collision,
We know that,
Force, F = ma
Put all the values,
So, the required force is 6666.7 N.