Answer:
Explanation:
20.1 + 2.00100 +48.28 + 0.015 = 70.396 ≈ 70.4
3 s.f. 6 s.f. 4 s.f. 3 s.f 3 s.f
Displacement equals (velocity times time) + 1/2 *(acceleration * time squared). =. (10*4) + 1/2 * (2*2^2) = 56 meters
Answer:
Option (B) is correct.
Explanation:
Given that the molecules of hydrogen gas (
) react with molecules of oxygen gas (
) in a sealed reaction chamber to produce water (
).
The governing equation for the reaction is
![2H_2 +O_2 \rightarrow 2H_2O](https://tex.z-dn.net/?f=2H_2%20%2BO_2%20%5Crightarrow%202H_2O)
From the given, the only fact that can be observed that 2 moles of
and 1 mole of
reacts to produce 2 moles of
.
As the mass of 1 mole of
grams ... (i)
The mass of 1 mole of
grams ...(ii)
The mass of 1 mole of
grams (iii)
Now, the mass of the reactant = Mass of 2 moles of
+ mass 1 mole of ![O_2](https://tex.z-dn.net/?f=O_2)
[ using equations (i) and (ii)]
grams.
Mass of the product = Mass of 2 moles of ![H_2O](https://tex.z-dn.net/?f=H_2O)
[ using equations (iii)]
=36 grams
As the mass of reactants = mass of the product.
So, mass is conserved.
Hence, option (B) is correct.
Answer:
36.22 mA
Explanation:
i1 = I , i2 = I, d = 8.2 cm = 0.082 m
Force per unit length = 3.2 nN/m = 3.2 x 10^-9 N/m
μo = 4 π × 10^-7 Tm/A
The formula for the force per unit length between the two wires is given by
F = μo / 4π x (2 i1 x i2) / d
3.2 x 10^-9 = 10^-7 x 2 x I^2 / 0.082
I = 0.0362 A = 36.22 mA
They will make a avalanche if melted their are so many ways to melt them like the sun fire ext.