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Gemiola [76]
4 years ago
5

While John is traveling along a straight interstate highway, he notices that the mile marker reads 239 km. John travels until he

reaches the 149 km marker and then retraces his path to the 167 km marker. What is John’s resultant displacement from the 239 km marker?
Physics
1 answer:
Doss [256]4 years ago
4 0

Answer:

72 km

Explanation:

We are given that

John marker reads=239 km

John travels and reaches the marker=149 km

John retraces his path and reaches the marker=167 km

We have to find the John's resultant displacement from 239 km.

Displacement:The displacement is the distance between two positions.

By definition of displacement

John's resultant displacement from 239 km=239-167

John's resultant displacement from 239 km=72 km

Hence, John's resultant displacement from 239 km=72 km

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How much heat is required to convert 0.3 kg of ice at 0°C to water at the same temperature
madreJ [45]

Answer:  

100,800 Jkg


The heat that is used to change the state of a mater is called latent heat.

In this case it is converting ice to water and it is called latent heat of fusion.

It is given by:

Heat  = mc

where m is the mass of ice and l is the specific latent heat of fusion of ice.

l = 0.336 MJ

Heat = 0.3 × 0.336 MJ

        = 0.3 × 0.336 × 10⁶

        = 100,800 Jkg


6 0
3 years ago
What are the five plants you can see from earth without a telescope?
nevsk [136]
The five planets that you can see from Earth without a telescope are Mercury, Venus, Mars, Jupiter and Saturn. 
3 0
3 years ago
PLEASE HELP!!!!!!
SashulF [63]


Somewhere in your book or your notes, you must have met the formula for the
gravitational attraction between two bodies.  If you can go back and find it, you
only need to plug your numbers into that formula, and out will pop the answer.

Formula:                            <u>Force = G (mA x mB) / (distance)²</u>

If everything is in SI units, then        G = 6.67 x10⁻¹¹ newton-meter² / kilogram²

You said that
                         mA = 8.1 kg
                         mB = 6.5 kg
                 distance = 0.5 m .

   Force = (6.67 x 10⁻¹¹ nt-m²/kg²) (8.1kg x 6.5kg / (0.5m)² =

                (6.67 x 10⁻¹¹ nt-m²/kg²)    ( 52.65 kg² ) / (0.25 m²) =

                     <em>1.4047 x 10⁻⁸ newtons .</em>

That's roughly    5.052 x 10⁻⁸ ounce .  (5% of one micro-ounce)


7 0
3 years ago
31. Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction.
pochemuha

Answer:

F = 0.5 mN

Explanation:

The full solved solution is in the attach document.

6 0
3 years ago
An infinite sheet of charge is located in the y-z plane at x = 0 and has uniform charge denisity σ1 = 0.37 μC/m2. Another infini
Firlakuza [10]

Answer:

The x-component of the electric field at point P --  31,638.41

Explanation:

Given data:

charge density \sigma_1 =0.37 \muC/m^2

Another charge density \sigma_2 = -0.19 \mu C/m^2

Electric field due to infinite sheet of charge is given as E

E = \frac{\sigma}{2\epsilon}

E_{NET} = E_1 + E_2

             = \frac{\sigma_1}{2\epsilon} + \frac{\sigma_2}{2\epsilon}

            =  \frac{0.37\times 10^{-6}}{2\times 8.85\times 10^{-12}} + \frac{0.19\times 10^{-6}}{2\times 8.85\times 10^{-12}}

             = 31,638.41

7 0
3 years ago
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