Class 11th
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New answer posted
2 months ago
Contributor-Level 10
With decrease in inter-nuclear distance, the potential energy of the system decreases, reaches a minimum value and then sharply increases due to rise in inter-electronic as well as inter-nuclear repulsions
New answer posted
2 months agoContributor-Level 10
The number of revolutions can be found using the rotational kinematic equation for angular displacement (θ):
θ = (ω_initial + ω_final)/2 * t
Number of revolutions = θ / 2π
Number of revolutions = [ (ω_final + ω_initial) * t] / (2 * 2π)
Based on the numerical values provided in the document, the calculation is:
Number of revolution = [ (2π * 3360/60 + 0) * t] / (2 * 2π) . with further calculation yielding the result:
Number of revolution = 728
New answer posted
2 months ago
Contributor-Level 10
The equations for an object rolling down an inclined plane without slipping are:
· Force equation: mg sinθ - f_s = ma
· Torque equation: f_s R = Iα
Since a = αR, we can write f_s = Iα/R = Ia/R².
Substituting this into the force equation:
mg sinθ - Ia/R² = ma
mg sinθ = a (m + I/R²)
a = (mg sinθ) / (m + I/R²)
The time taken to travel a distance S is given by S = ½ at², which means t ∝ 1/√a. Therefore, the object with the largest acceleration (a) will arrive first.
The problem is analyzed for different bodies:
· Ring: I =
New answer posted
2 months agoContributor-Level 10
R_eq = R? + R?
L_total / (K_eq * A) = L? / (K? A) + L? / (K? A)
Assuming L? = L? = l, L_total = 2l
2l / (K_eq * A) = l/ (K? A) + l/ (K? A)
2/K_eq = 1/K? + 1/K? = (K? + K? )/ (K? )
K_eq = 2K? K? / (K? + K? )
New answer posted
2 months agoContributor-Level 10
In water gas shift reaction carbon monoxide is oxidized into carbon dioxide by treating it with steam in presence of catalyst.
New answer posted
2 months agoContributor-Level 10
U = U? + U? = (n? /N_A) (F? R/2)T? + (n? /N_A) (F? R/2)T?
For the mixture: U = (n? +n? )/N_A * (FR/2)T
F = (n? F? + n? F? ) / (n? + n? )
Equating the expressions for U and solving for T gives:
T = (n? F? T? + n? F? T? ) / (n? F? + n? F? )
New answer posted
2 months agoContributor-Level 10
P? - P? = 4T/a
P? - P? = 4T/b
P? - P? = 4T (1/a - 1/b)
Also, P? - P? = 4T/r
4T/r = 4T (1/a - 1/b)
1/r = (b-a)/ab
r = ab / (b-a)
New answer posted
2 months agoContributor-Level 10
η = 1 - T_C / T_H
η = 1 - 400/800 = 1 - ½ = ½
η = W/Q_H ⇒ ½ = W/Q_H ⇒ Q_H = 2W = 2 * 1200 = 2400 J
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