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Ilya [14]
4 years ago
12

Plz.. help me this out I am from nepal actually it is math

Physics
1 answer:
Ierofanga [76]4 years ago
4 0

Answer:

tan (x eˣ) + C

Explanation:

∫ (eˣ + x eˣ) / (cos² (x eˣ)) dx

First, use u-substitution.

u = x eˣ

du = (eˣ + x eˣ) dx

∫ 1 / (cos² u) du

∫ sec² u du

tan u + C

Substitute back:

tan (x eˣ) + C

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A person jumps out a fourth-story window 14 m above a firefighter safety net. The survivor stretches the net 1.8 m before coming
Monica [59]

Answer:

The deceleration is  a =  - 76.27 m/s^2

Explanation:

From the question we are told that

   The height above  firefighter safety net is H  = 14 \ m

   The length by which the net is stretched is s =  1.8 \ m

   

From the law of energy conservation

    KE_T + PE_T =  KE_B + PE_B

 Where KE_T is the kinetic energy of the person before jumping which equal to zero(because to kinetic energy at maximum height )

   and  PE_T is the potential energy of the before jumping  which is mathematically represented at

          PE_T  = mg H

and  KE_B is the kinetic energy of the person just before landing on the safety net  which is mathematically represented at

        KE_B = \frac{1}{2} m v^2

and  PE_B is the potential energy of the person as he lands on the safety net which has a value of zero (because it is converted to kinetic energy )

   So the above equation becomes

          mgH =  \frac{1}{2} m v^2

=>           v =  \sqrt{2 gH }

    substituting values

                v =  16.57 m/s

Applying the equation o motion

             v_f =  v  + 2 a s

Now the final velocity is zero because the person comes to rest

      So

         0 = 16.57 + 2 * a * 1.8

            a =  - \frac{16.57^2 }{2 * 1.8}

            a =  - 76.27 m/s^2

         

         

4 0
3 years ago
Determine the 3 standing waves for a 4 m length of rope.
strojnjashka [21]

Harmonics, Loop and Harmonic number

Hope this helps :)

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4 years ago
A 9Ω resistance is cut into three equal parts and connected in parallel. Find the equivalent resistance of the combination.​
sammy [17]

Answer:

the ans i 1 ohm

Explanation:

if i cut a resistor of 9 ohm into 3 equal parts then each resistor will have a resistance of 3 ohm and if they are in parallel combination the net resistance will be R

so 1/R=1/R1+1/R2+1/R3

     1/R=1/3+1/3+1/3

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3 years ago
Rita places a 2.5 kg block on a frictionless inclined plane that is 30 degrees above horizontal. She applies a horizontal force,
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Answer:

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