We will utilize Wien's displacement law, given by the equation λ T = b, where λ represents the wavelength of emitted light from a heated object at maximum. By substituting the provided temperature and constant b into the equation, we find λ for various temperatures: at 500 K, λ = 5.796 μm or 5796 nm; at 1050 K, λ = 2760 nm; at 1800 K, λ = 1610 nm; and at 2500 K, λ = 1159.2 nm. The visible light spectrum starts at 740 nm, suggesting that at 2500 K, some visible red light may emerge as its calculated peak wavelength is within the visible range.
Response: 800N
Clarification:
Provided data:
Ball mass = 0.8kg
Contact duration = 0.05 seconds
Final and initial speed = 25m/s
The average force exerted by the ball on the wall can be calculated using the following relationship:
Force (F) = mass (m) * average acceleration (a)
a= (initial velocity (u) + final velocity (v))/t
m = 0.8kg
u = v = 25m/s
t = contact time of the ball = 0.05s
Thus,
a = (25 + 25) ÷ 0.05 = 1000m/s^2
Hence,
The average force magnitude (F)
F=ma
m = ball mass = 0.8
a = 1000m/s^2
F = 0.8 * 1000
F = 800N
