Explanation

Using Wien's displacement law:

λ_peak ∝ 1/T

Given: Initial temperature (T1) = 6000 K, Initial peak wavelength (λ1) = 4800 Å

Final temperature (T2) = 3000 K

λ2 / λ1 = T1 / T2

λ2 = λ1 * T1 / T2

= 4800 Å * 6000 K / 3000 K

= 9600 Å

Explanation

Since the two boxes are identical, the weight of the second box is equal to the weight of the first box. 

The normal force from the table will increase to support the combined weight of both boxes, which is 150 N (2 x 75 N).

Explanation

According to Kirchhoff's law:

Coefficient of emission (e) + Coefficient of reflection (r) + Coefficient of transmission (t) = 1

Given: t = 0.33, r = 0.64

e + 0.64 + 0.33 = 1

e = 1 - 0.97

= 0.03

Explanation

Explanation

Using the Heisenberg Uncertainty Principle:

ΔE * Δt >= h/4π

where ΔE = h * Δv (energy uncertainty) and Δt = 10^(-8) s (lifetime)

h * Δv * 10^(-8) >= h/4π

Δv >= 1/(4π * 10^(-8))

≈ 8 x 10^6 Hz

Explanation

Explanation

The Fermi energy is the highest energy level that electrons occupy at absolute zero temperature.

Above this energy, states are empty, and below it, they are filled.

Explanation

Using the Parallel Axis Theorem:

I = I_CM + Md^2

where I_CM = MR^2/2 and d = R (radius)

I = MR^2/2 + MR^2

= 3/2 MR^2

Explanation

Explanation