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sveta [45]
2 years ago
7

A 71 kg man is walking at 2 m/s. Calculate the Kinetic Energy for the man

Physics
1 answer:
Westkost [7]2 years ago
7 0

Answer:

<h2>142 J</h2>

Explanation:

The kinetic energy of an object can be found by using the formula

k =  \frac{1}{2} m {v}^{2}  \\

m is the mass

v is the velocity

From the question we have

k =  \frac{1}{2}  \times 71 \times  {2}^{2}  \\  =  \frac{1}{2}  \times 71 \times 4 \\  = 71 \times 2

We have the final answer as

<h3>142 J</h3>

Hope this helps you

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Below, the two-way table is given for a class of students. Freshmen Sophomore Juniors Seniors Total Male 4 6 2 2 Female 3 4 6 3
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The required probability is 3/4.We have to compute the probability

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<h3>What is the probability?</h3>

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates the impossibility of the event and 1 indicates certainty.

Since the number of females who are junior is 6, determine the required probability.

P(Female|Junior)=6/8=3/4

Therefore, the required probability is 3/4.

To learn more about the probability visit:

brainly.com/question/24756209

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An N-slit system has slit separation d and slit width a. Plane waves with intensity I and wavelength O are incident normally on
Leokris [45]

Answer:

E. d and O

Explanation:

"Light passing through a single slit forms a diffraction pattern somewhat different from those formed by double slits or diffraction gratings".

According to Huygens’s principle, "for each element of the wavefront in the slit emits wavelets. These are like rays that start out in phase and head in all directions. (Each ray is perpendicular to the wavefront of a wavelet.) Assuming the screen is very far away compared with the size of the slit, rays heading toward a common destination are nearly parallel".

The destructive interference for a single slit is given by:

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Where

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\theta is the angle relative to the original direction of the light

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I represent the intensity

When the intensity and the wavelength are incident normally the angular as we can see on the expression above the angular separation just depends of the distance d and the wavelength O.

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