The answer is D. Blackbody radiation. The piece of iron glows red because its temperature is around 1000 K, then yellow because its temperature is around 2800 K, and then white because its temperature is around 5500K. This shows that the spectrum of the radiation is determined by absolute temperature, as when the temperature of a blackbody radiator increases, the peak of the radiation curve moves to shorter wavelengths.
dimensions of the bed is given as
now the volume of the bed is given as
now the mass of water in it is given as
<em>so it will contain 1581 kg mass in it</em>
Answer:
option D
Explanation:
given,
length of the pipe, L = 0.96 m
Speed of sound,v = 345 m/s
Resonating frequency when both the end is open
n is the Harmonic number
2nd overtone = 3rd harmonic
so, here n = 3
now,
f = 540 Hz
The common resonant frequency of the string and the pipe is closest to 540 Hz.
the correct answer is option D
Given: Mass m = 60 Kg
Weight W = 96 N
Required: Acceleration due to gravity, g = ?
Formula: W = mg
g = W/g
g = 96 Kg.m/s²/60 Kg (note: this is the derive unit for Newton "N")
g = 1.6 m/s²
Answer:
1.88 N
Explanation:
h = 3.2 m, A = 0.6 cm^2 = 0.6 x 10^-4 m^2
density of water, d = 1000 kg/m^3, g = 9.8 m/s^2
Pressure at depth h, P = h x d x g = 3.2 x 1000 x 9.8 = 31.36 x 10^3 Pa
Force = pressure x Area = 31.36 x 10^3 x 0.6 x 10^-4 = 1.88 N
Thus, the force on ear drum is 1.88 N.
