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Blizzard [7]
3 years ago
9

A students walks one hour. She walks 4 blocks east and 2 blocks west. Her average velocity is?

Physics
1 answer:
Rama09 [41]3 years ago
6 0

Let us consider the following figure

<em>figure</em><em> </em><em>is</em><em> </em><em>in</em><em> </em><em>pict</em><em>ure</em>

So, his/her total displacement = 2 blocks.

total time = 1 hour

Average Velocity

= Total displacement/ total time

= 2 blocks/ 1 hour

= 2 blocks/ h

So, her/his average velocity is 2 blocks per hour.

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A sample of argon has a volume of 205 mL when its temperature is -44.0 oC and its pressure is 712 mm of Hg. What would be the vo
anzhelika [568]

Answer:

231.98 mL

Explanation:

V₁ = Initial volume = 205 mL

V₂ = Final volume

P₁ = Initial pressure = 712 mmHg

P₂ = Final pressure = 750 mmhg (STP)

T₁ = Initial temperature = -44 °C = 229.15 K

T₂ = Final temperature = 273.15 K (STP)

From Combined gas law

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\\\Rightarrow V_2=\frac{P_1V_1T_2}{T_1P_2}\\\Rightarrow V_2=\frac{712\times 205\times 273.15}{229.15\times 750}=231.98\ mL

Volume of the argon at STP is 231.98 mL

5 0
4 years ago
Read 2 more answers
The orbital motion of a deep water wave extends to a depth equal to.
Amanda [17]
1/2 the wavelength.......
8 0
2 years ago
Who else watched the 2016 world series and became a cubs fan for life
balandron [24]

Answer:

Sheeeeeeeeeeeeesh

Explanation:

naw not really ФωФ

8 0
3 years ago
You throw a 5.5 g coin straight down at 4.0 m/s from a 25-m-high bridge.
yuradex [85]

<u><em>Answer</em></u>

A) 1,347.5 Joules

B) 22.49 m/s


<u><em>Explanation</em></u>

<u>Part A</u>

The work done by the gravity is known as potential energy.

It is given by;

P.E = mgh

Where m is mass, g is acceleration due to gravity and h is the vertical height.

P.E = 5.5 × 9.8 ×25

= 1,347.5 Joules.

<u>Part B</u>

Using the Newton's third Law of motion,

V² = U² +2as

Where v is final velocity, u is the initial velocity, and s is the displacement of the stone.

V² = 4² + (2×9.8×25)

= 16 + 490

= 506

V = √506

= 22.49 m/s


6 0
4 years ago
Read 2 more answers
A 100 kilogram person acquires a velocity of 15 meters per second down a ski slope.What is the skier's kinetic energy?
azamat

11250J

Explanation:

Given parameters:

Mass of the person = 100kg

Velocity = 15m/s

Unknown:

Kinetic energy  = ?

Solution:

The kinetic energy of a body is energy due to the motion of the body.

 Kinetic energy = \frac{1}{2} m v²

    m is the mass of the body

    v is the velocity

  Substituting the parameters:

     

 K. E =  \frac{1}{2} x 100 x 15² = 11250J

Learn more:

Kinetic energy brainly.com/question/6536722

#learnwithBrainly

4 0
3 years ago
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