I = pressure amplitude given = 0.2 W/m²
dB = decibel reading
decibel reading from the pressure amplitude is given as
dB = 10 log₁₀ (I/10⁻¹²)
inserting the values in the above equation
dB = 10 log₁₀ (0.2/10⁻¹²)
dB = 10 log₁₀ (2 x 10⁻¹/10⁻¹²)
dB = 10 log₁₀ (2 x 10⁻¹.10¹²)
dB = 10 log₁₀ (2 x 10¹²⁻¹)
dB = 10 log₁₀ (2 x 10¹¹)
dB = 113.01 db
hence the decibel reading comes out to be 113.01 db
Answer: Option 5.
Decreases increases increases.
Explanation:
Electromagnetic spectrum refers to differences in frequencies, wavelengths and photon energies of electromagnetic radiation.
From the top of the list to the bottom i.e from radio waves, infrared waves, visible lights, ultraviolet radiation, gamma radiation, wavelengths decreases, the frequency increases as the photon energy increases.
The electromagnetic radiations : radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays have high-frequency and short wavelengths. Their wavelengths decrease. The photon energy is directly proportional to wave frequency.
Sex cells have half as many chromosomes as other cells. Sex cells are therefore called haploid.
Answer:
You would weigh very slightly more at sea level than at the top of a mountain, not enough for you to notice, but a measurable amount. Weight, which really means gravitational force, is proportional to the product of the masses of two objects acting on each other, in this case the giant earth and the minuscule you.
Explanation:
Answer:
Explanation:
Let the velocity of projection be V .
component of velocity in vertically downward direction = v cos 44.1
component of velocity in horizontal direction = v sin 44.1
s = ut + 1/2 gt²
611 = v cos 44.1 x 5.4 + 1/2 x 9.8 x 5.4²
= 611 = 3.88 v + 142.88
v = 120.65 m /s
b )
horizontal component of velocity of projectile = v sin 44 .1 = 120.65 sin44.1
= 83.96 m /s
horizontal displacement = 83.96 x 5.4 = 453.38 m
c ) horizontal component will remain unchanged so horizontal component
= v sin 44 .1 = 120.65 sin44.1
= 83.96 m /s
d ) velocity of projectile just before striking the ground
v = u + gt
= v cos 44.1 + 9.8 x 5.4
= 120.65 xcos 44.1 + 9.8 x 5.4
= 86.79 + 52.92
= 139.71 m /s
