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Annette [7]
3 years ago
7

Watching your fish swim in their tank, you notice that when one fish repeatedly jumps, it causes a standing wave given by the ti

me-independent function
f(x)=asin(bx),with a = 0.015 m and b = 18.1 m−1 .
Part A
If the tank is 0.96 m long, determine the position of the first node, beginning with the node at one end of the tank.
Part B
If the tank is 0.96 m long, determine the position of the second node, beginning with the node at one end of the tank.

Physics
1 answer:
ella [17]3 years ago
6 0

Answer:

Check the attached image below.

Explanation:

Kindly check the attached image below to get the step by step explanation to the above question.

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You attach a meter stick to an oak tree, such that the top of the meter stick is 1.471.47 meters above the ground. Later, an aco
Alexandra [31]

Answer:

The value is  h_a  =   1.712 \  m

Explanation:

From the question we are told that

   The  height of the top meter stick above the ground is  h_1  =  1.47 \  m

 

    The  time taken for the acorn to pass the length of the  stick is t =  0.281 \  s

Generally the height of the acorn at the point it is the same height with the metered stick is mathematically represented as  

     h =  h_m =  u_a  * t  +  \frac{1}{g} t^2

Here h_m is height of the meter stick and the value is 1 m (This because we are told in the question that the stick is 1 meter in length ( a meter stick))

So

      1  =  u_a  *  0.281  +  \frac{1}{9.8} (0.281)^2

=>   u_a  =  -2.2 \  m/s

Generally the velocity of the acorn just before passing the top of the meter stick is mathematically represented by a kinematic equation as

         u^2_a   =  u^2  + 2gs

here  u is zero since the acorn started from rest

So  

         (-2.2)  =  0  + 2 *  9.8 * s

         s  =  0.242 \  m

Generally the height of the acorn is

     h_a   =  h_1 + s

      h_a  =  0.242  +  1.47\

      h_a  =   1.712 \  m

       

       

     

3 0
4 years ago
An electric bulb marked 40W-200V is used in a circuit of supply voltage 100V. Now its power is:
svp [43]

Answer:

Power of the bulb is 10 Watts.                

Explanation:

We have,

Power and voltage of electric bulb is 40 W and 200 V. Using this data we can find the resistance of the bulb.

Power, P=\dfrac{V^2}{R}

R is resistance

R=\dfrac{V^2}{P}\\\\R=\dfrac{(200)^2}{40}\\\\R=1000\ \Omega

The supplied voltage is 100 V.

Now power is given by :

P=\dfrac{V^2}{R}\\\\P=\dfrac{100^2}{1000}\\\\P=10\ W

So, now the power of the bulb is 10 Watts.  

7 0
3 years ago
G2-017 - Smith
jarptica [38.1K]

According to newton's second law of motion F=ma , but here we have to find a so a=f/m ,a=8.11/1028=0.007m/sec² or 7×10‐3m/sec2

6 0
4 years ago
Which of the following is the kinetic rate equation for the addition-elimination mechanism of nucleophilic aromatic substitution
Helga [31]

Answer:

Rate = k[aryl halide][nucleophile]

Explanation:

The simple aryl halides are almost inert to usual nucleophilic reagents but considerable activation on the ring can be produced by the addition of strongly electron-attracting substituents on either the ortho or para positions, or both. These groups deactivate the ring to allow the attack of the nucleophille on the ring.

Thus, these reactions can occur by following addition-elimination mechanism in which the nucleophille first attacks the aryl halide and then the elimination of the leaving group takes place.

<u>Kinetic studies of this type of mechanism demonstrate that the reactions are of second-order kinetics– first order w.r.t. nucleophile and also, first-order w.r.t. aromatic substrate. The rate determining step (r.d.s.) is the formation of the addition intermediate.</u>

Thus,

<u>Rate = k[aryl halide][nucleophile]</u>

7 0
3 years ago
A wagon of dog treats (combined mass 55 kg) is rolling at 2.1 m/s. A dog with mass 21 kg dives into the wagon, colliding with ju
Lunna [17]

Answer:

Explanation:

An impulse results in a change of momentum

If the wagon and dog both stop, they must have had equal and opposite momentums

FΔt = mΔv

F = mΔv/Δt = m(v₁ - v₀)/(t₁ - t₀)

v₁ = t₀ = 0

F = m(v₀)/t₁

F = 55(2.1)/0.1 = 1155 N

We could have also figured the dog's initial velocity and used the dog's mass in the equation as well. Result would be identical.

5 0
2 years ago
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