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Elan Coil [88]
3 years ago
5

How is velocity and momentum to describe how they are related

Physics
1 answer:
Alik [6]3 years ago
7 0

Answer:

i guess maybe because it is based on an objects mass and velocity

Explanation:

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FIGURE 4.1 shows a rectangular wire loop 0.3 m x 0.2 m moving horizontally to the right at 12 ms -1 in a uniform magnetic field
timama [110]
<h3><u>Given :- </u></h3>

  • Length of the rectangular wire, L=0.3 m
  • Width of the rectangular wire, b=0.2m
  • Magnetic field strength, B=0.8 T
  • Velocity of the loop, v =12 m/s
  • Induced Current, I = 3 A

\underline{\underline{\large\bf{Solution:-}}}\\

(I) Emf developed,E in the loop is given as:

\begin{gathered}\\\implies\quad \sf E = BLv \\\end{gathered}

\begin{gathered}\\\implies\quad \sf E = 0.8 \times 0.3 \times 12 \\\end{gathered}

\begin{gathered}\\\implies\quad \sf E = 2.88 V \\\end{gathered}

\longrightarrowI = E/R

\quadR = E/I

where

  • R = resistance
  • E = Induced EMF
  • I = Current

\begin{gathered}\\\implies\quad \sf R = \frac{2.88}{3} \\\end{gathered}

\begin{gathered}\\\implies\quad \boxed{\sf{ R = 0.96 \;ohm}}\\\end{gathered}

(ii) The direction of current induced is from P to Q which is given by B × V vector . It may also be explained by Lenz law. Since magnetic field is from S to N . The fingers of the right hand are placed around the wire so that the curling of fingers will show the direction of the magnetic field produced by the wire then the thumb points in the direction of current flow which is from P to Q.

3 0
2 years ago
A particle whose speed is 50 m/s moves along the line from A(2,1) to B(9,25). Find its velocity vector in the form of ai +bj.
Kitty [74]

To write it in the form ai + bj, we need to find a and b which are:

a = x component

b = y component

 

length of x = 9 – 2 = 7

length of y = 25 – 1 = 24

 

tan θ = 24 / 7

θ = 73.74°

 

a = (50 m/s) cos 73.74

a = 14 m/s

 

b = (50 m/s) sin 73.74

b = 48 m/s

 

Hence,

14i + 48j

3 0
3 years ago
How can astronomers infer wich elements are found in a star
Alchen [17]
By previous elements found in other stars, accurate guesses and lots of studying
5 0
3 years ago
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Carbon dioxide is a substance made up of atoms of carbon and oxygen in fixed ratios. Carbon dioxide is?
Troyanec [42]
This indicates that carob dioxide is a compound 
4 0
3 years ago
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A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axi
Marrrta [24]

Answer:

h = 2.64 meters      

Explanation:

It is given that,

Mass of one ball, m_1=3\ kg

Speed of the first ball, v_1=20\ m/s (upward)

Mass of the other ball, m_2=2\ kg

Speed of the other ball, v_2=-12\ m/s (downward)

We know that in an inelastic collision, after the collision, both objects move with one common speed. Let it is given by V. Using the conservation of momentum to find it as :

V=\dfrac{m_1v_1+m_2v_2}{m_1+m_2}

V=\dfrac{3\times 20+2\times (-12)}{3+2}

V = 7.2 m/s

Let h is the height reached by the combined balls of putty rise above the collision point. Using the conservation of energy as :

mgh=\dfrac{1}{2}mV^2

h=\dfrac{V^2}{2g}

h=\dfrac{7.2^2}{2\times 9.8}

h = 2.64 meters

So, the height reached by the combined mass is 2.64 meters. Hence, this is the required solution.

5 0
3 years ago
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