Answer:
Velocity of rocket will be equal to 7.81 m/sec
Explanation:
We have given mass of the rocket 
Mass of fuel is given 
( As 1 kg is equal to 1000 gram )
Velocity of fuel 
= 625 m/sec
We have to find the velocity of rocket 
From conservation of momentum we know that initial momentum is equal to final momentum '
So 
, here 
is mass of rocket is velocity of rocket 
is mass of fuel and is velocity of fuel
So 
So velocity of rocket will be equal to 7.81 m/sec
Answer:
The initial arrow's velocity is 40,9 m/s at 11.9° from the horizontal
Explanation:
<em>In order to find the inital velocity we need to determine its components and the angle that the arrow is launched at.</em>
<em>For horizontal component, we will have:</em>
<em>ν cos(θ)t = x ⇒ cos(θ) = x/νt</em>
<em>For vertical component we will have:</em>
<em>h= v sin(θ)t ₋ gt²÷ 2 ⇒ sin (θ) = h + gt²÷2/νt</em>
<em>From the two equations we got, after noting that the vertical displacement is 3m, we can calculate </em>
<em>tan(θ) = h +gt²÷2/νt/ x÷νt = h+ gt²÷2/x = 3+ 9.8.0.5²÷2/20 = 0.21125</em>
<em>Now we can calculate θ = tan⁻¹(0.21125) ≈ 11.9°</em>
<em>Now that we know the angle we can subtitute at any of the expressions for the two components of the velocity . Let's do this subsitution at the horizontal component:</em>
<em>ν cos(θ)t= x =ν = x/tcos(θ)= 20/ 0.5cos(11.9) ≈ 40.9 m/s.</em>
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The particle with sharp ends have the slowest rate of deposition
Answer: Option C
<u>Explanation:</u>
As per aerosol physics, deposition is a process where aerosol particles accumulate or settle on solid surfaces. Thereby, it reduces the concentration of particles in the air. Deposition velocity (rate of deposition) defines from F = vc, where v is deposition rate, F denotes flux density and c refers concentration.
Deposition velocity is slowest for particles of intermediate-sized particles because the frictional force offers resistance to the flow. Density is directly proportional to the deposition rate so clearly shows that high-density particles settle faster. Due to friction, round and large-sized particles deposit faster than oval/flattened sediments.
An electromagnet is a type of magnet in which the magnetic field is produced using the current. The simplest form of an electromagnet is a wire wrapped around in a coil.
The strength of magnetic field of such magnet is given with this equation:
Where N is the number of loops in the coil, I is the strength of the current flowing through the coil, L is the length of the coil, and
is <span>permeability of the electromagnet core material.
From this equation, we can see that increasing both the current and number of loops will increase the strength of the magnet.
Both BLANKS should be
Increase. When you use the additional battery you will have more voltage and more voltage means more electricity.</span>
