Answer;
-Exothermic reaction;
-The sign of the energy change is negative (-)
Explanation;
2CuO(s) + C(s) --> 2Cu(s) + CO2(g)
ΔH = ΣΔHf(products) - ΣΔHf(reactants)
ΔH = -393.5kJ - 2(-155.2kJ) = -83.1 kJ
The reaction is exothermic.
-An exothermic process or reaction releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.
they are needed to withstand the recoil as tons of water are ejectedd at high speed ... like a cannon
Answer:
m1 = the mass of the blue sphere = 5.8 kg
m2 = the mass of the red sphere = 2.5 kg
v1 = initial velocity of the blue sphere before the collision = 4.1 m/s
v2 = initial velocity of the red sphere before the collision = 0 m/s
v'1 = final velocity of the blue sphere after the collision = 1.3 m/s
v'2 = final velocity of the red sphere after the collision = ?
using conservation of momentum
m1v1 + m2v2 = m1v'1 + m2v'2
(5.8) (4.1) + (2.5) (0) = (5.8) (1.3) + (2.5) (v'2)
23.78 = 7.54 + (2.5) (v'2)
-7.54 -7.54
16.24 = (2.5) v'2
--------- -----------
2.5 2.5
v'2 = 6.5
Explanation:
F=ma so,we have
f=300.3=900 N
but you should say 3 m/s^2
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