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alex41 [277]
3 years ago
12

Please help!!!

Physics
1 answer:
iVinArrow [24]3 years ago
6 0

A).  Her distance traveled was (700m + 500m) = <em>1,200 meters</em>

B).  Her displacement was (700m north + 500m south) = <em>200 meters north</em>

C).  Her average speed = (distance covered) / (time to cover the distance)

Speed = (1,200 meters) / (15 seconds)

<em>Speed = 80 meters/second</em>

(Layne is an incredible walker !  That's about 179 miles per hour.)

(She walks 700m in 10 seconds.  Usain Bolt runs only 100m in 10 seconds.)

D).  Her averge velocity = (displacement) / (time)

Velocity = (200 meters north) / (15 seconds)

<em>Velocity = (13 and 1/3) m/s north</em>

(This is only about 33% faster than Usain Bolt, if he went straight instead of doubling back, and if he could keep it up for 200 meters instead of only 100 meters.)

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What is the difference between: first moment of area and second moment of area?
zhannawk [14.2K]
To determine the centroid of the object first moment of area is used.

To predict the resistance of a shape to bending and deflection which are directly proportional, second moment of area is used.

6 0
3 years ago
Given Vout = 17.33 vpp and R1 = 3 kΩ, find the value of RF required to provide Av = 4.33. (Round your answer to 2 decimal places
Olenka [21]

Answer:

The magnitude of V_{2} is 4 V and phase of input voltage is zero

Explanation:

Given:

Output voltage V_{out} = 17.33

Resistance R_{1} = 3 kΩ

Voltage gain A_{v} = 4.33

For finding feedback resistance we use gain equation

Gain equation for non inverting op-amp is given by,

     A_{v} = 1+\frac{R_{f} }{R_{1} }

   4.33 = 1+ \frac{R_{f} }{3 k }

     R_{f} ≅ 10 kΩ

For finding input voltage we use,

   A_{v} = \frac{V_{out} }{V_{2} }

    V_{2} = \frac{17.33}{4.33}

    V_{2} = 4 V

The Phase of V_{2} is zero because output voltage phase is 360°

Therefore, the magnitude of V_{2} is 4 V and phase of input voltage is zero

7 0
3 years ago
Bodies weighing 1 kilogram and 5 kilograms lie on a smooth horizontal surface. If a traction force of 0.6 N acts on another 5 kg
natima [27]

0.6/5,1,5

so calculate it

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6 0
3 years ago
Science is orderly knowledge proven by
raketka [301]
<span>Science is orderly knowledge proven by experimentations.</span>
7 0
3 years ago
Read 2 more answers
In the periodic table, the properties repeat in what direction?​
pogonyaev

Answer:

Left to right and top to bottom

Explanation:

On the periodic table, the properties repeat from left to right and from top to bottom.

Periodic properties have a pattern from the top to the bottom or down a group or family.

Also, across the period from left to right, they also show a repeating pattern.

  1. Certain properties increase from left to right and decreases from top to bottom. E.g. electronegativity.
  2. Also, some properties decreases from left to right and increases from top to bottom e.g. atomic radius.
7 0
3 years ago
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