Answer:
7.888m
Explanation:
Given:
frequency 'f'= 90Hz
velocity of the sound 'v' = 340 m /sec
The wavelength of the wave is given by,
λ= v/f => 340/90
λ= 3.777m
The destructive interference condition is givn by
Δd= 
λ
where, m=0,1,2,3,..
m=0, for minimum destructive interference
Δd= 
x 3.777
Δd=1.888
Therefore, the required distance is
=
+ Δd => 6 + 1.888
= 7.888m
Thus, So the speaker should be placed at 7.888 m
Neutrons < Cosmic radiation < Gamma rays < beta particles < Alpha particles
Explanation:
Alpha particles are the most energetic of the nuclear radiations produced in nuclear reactions.
Neutrons are radiations with no charges on them. They are the lowest radiation in terms of energy.
Cosmic radiation are energetic radiations usually produced when solar radiation interacts with the atmosphere.
Gamma ray is a form of electromagnetic radiation with no mass and charge.
Beta particles are of two types. The negative and positive beta particles. Negative beta particles are called negatrons and they carry negative charges while positrons carry positive charges.
Alpha particles are similar to Helium atom,they are the most energetic of all the radiations.
Learn more:
Radiation brainly.com/question/9077368
#learnwithBrainly
Answer:
y = y₀ (1 - ½ g y₀ / v²)
Explanation:
This is a free fall problem. Let's start with the ball that is released from the window, with initial velocity vo = 0 and a height of the window i
y = y₀ + v₀ t - ½ g t²
y = y₀ - ½ g t²
for the ball thrown from the ground with initial velocity v₀₂ = v
y₂ = y₀₂ + v₀₂ t - ½ g t²
in this case y₀ = 0
y₂2 = v t - ½ g t²
at the point where the two balls meet, they have the same height
y = y₂
y₀ - ½ g t² = vt - ½ g t²
y₀i = v t
t = y₀ / v
since we have the time it takes to reach the point, we can substitute in either of the two equations to find the height
y = y₀ - ½ g t²
y = y₀ - ½ g (y₀ / v)²
y = y₀ - ½ g y₀² / v²
y = y₀ (1 - ½ g y₀ / v²)
with this expression we can find the meeting point of the two balls
The 4 fourth row of the graph is a quadratic graph
Do 112m /29s which it will be 3.862 which if you round it, it will be 3.86 m/s
