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const2013 [10]
3 years ago
12

Why is it more comfortable to fall onto a big pillow than onto a wooden floor ?

Physics
1 answer:
alexandr402 [8]3 years ago
6 0

I believe the answer to this question is C. The pillow distributes the decelerating force over a greater amount of time .

sudden stops are damaging, not the fall itself.

When falling on a mat it will take longer since a smaller force=longer falling time

when falling on a wooden floor it will take shorter since a larger force=smaller falling time

Hence, if the sudden fall is what causes impact and discomfort, and a smaller force equals longer falling time, and a larger force equals shorter falling time and smaller falling time equals less impact, then, C. must be the answer.

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How is distance related to force in this experiment to mass
Elden [556K]
When distance<span> is increased the amount of </span>force<span> needed will depend on the </span>mass<span> of the object. </span>
5 0
3 years ago
The drift velocity should be in the same direction as the applied force. <br> a. true <br> b. false
Marina CMI [18]

It is a false statement i.e. drift velocity is not same in the direction as the applied force.

Drift velocity of a  current-carrying conductor can be explained as, the charges i.e. electrons do not  flow in the same direction of current. In other word, in most cases the movement of the electrons is almost random, with a small net velocity. So that , the drift velocity, in the direction opposite to the electric field.

Drift velocity v_{d} is inversely proportional to the number of electron per unit volume of the conductor e. Therefore, the formulation can be given as ,

v_{d} = σ E/ne

The above equation shows the drift velocity in a current carrying conductor  

where, v_{d} is drift velocity , σ is the conductivity, E is electric force and n is number of electrons per unit volume of the conductor e.

Hence here we can say that, the drift velocity is not in the same direction as the applied force.

To know more about drift velocity

brainly.com/question/17167604

#SPJ4

4 0
2 years ago
A car is moving at 12m/s and has a mass aof 600kg. what is the kinetic energy of the car?
earnstyle [38]
KE=(1/2)mv^2
KE=(1/2)(600 kg) (12 m/s) ^2
KE=(1/2)(600 kg) )144 m^2/s^2)
KE= 43,200 kg*m^2/s^2=43,200 Joules
7 0
3 years ago
3. Which form of radiation is used to kill microorganisms?
inn [45]

Answer:

d

Explanation:

uv is safe for humans but bad for bacteria etc... at least I think. I'm sorry if I'm wrong

4 0
3 years ago
Calculate the de Broglie wavelength of: a) A person running across the room (assume 180 kg at 1 m/s) b) A 5.0 MeV proton
solmaris [256]

Answer:

a

\lambda = 3.68 *10^{-36} \  m

b

\lambda_p = 1.28*10^{-14} \ m

Explanation:

From the question we are told that

   The mass of the person is  m =  180 \  kg

    The speed of the person is  v  =  1 \  m/s

    The energy of the proton is  E_ p =  5 MeV = 5 *10^{6} eV  = 5.0 *10^6 * 1.60 *10^{-19} = 8.0 *10^{-13} \  J

Generally the de Broglie wavelength is mathematically represented as

      \lambda = \frac{h}{m * v }

Here  h is the Planck constant with the value

      h = 6.62607015 * 10^{-34} J \cdot s

So  

     \lambda = \frac{6.62607015 * 10^{-34}}{ 180  * 1  }

=> \lambda = 3.68 *10^{-36} \  m

Generally the energy of the proton is mathematically represented as

         E_p =  \frac{1}{2}  *   m_p  *  v^2_p

Here m_p  is the mass of proton with value  m_p  =  1.67 *10^{-27} \  kg

=>     8.0*10^{-13} =  \frac{1}{2}  *   1.67 *10^{-27}  *  v^2

=>   v _p= \sqrt{\frac{8.0 *10^{-13}}{ 0.5 * 1.67 *10^{-27}} }

=>   v = 3.09529 *10^{7} \  m/s

So

        \lambda_p = \frac{h}{m_p * v_p }

so    \lambda_p = \frac{6.62607015 * 10^{-34}}{1.67 *10^{-27} * 3.09529 *10^{7} }

=>     \lambda_p = 1.28*10^{-14} \ m

     

5 0
3 years ago
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