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k0ka [10]
3 years ago
6

Determine the answer to the equation 30 km/h × 17 h =

Physics
1 answer:
Jobisdone [24]3 years ago
5 0
30 km/h * 17 h =  30*17  km/h  *h
                         =    510 km
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Which of the following describes the variable that responds to a change?
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Dependent variable is your answer.
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What causes wind how does the process reverse itself between day and night?
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<span>Wind is nature's way of balancing the temperature between hot and cold. Wind always flows from heat to cool. When night falls, the air cools. And since it gets cooler at night it reverses.</span>
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3 years ago
Calculate the mass of air of density 1.2kgm-3 in a room of dimensions 8m by 6m by 4m.
77julia77 [94]

Answer:

230.4kg

Explanation:

volume of the room = l× b×h

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5 0
2 years ago
draw a labelled ray diagram to locate the image of an object formed by a convex lens of focal length 20cm when the object is pla
azamat
<h3><u>Answer</u> :</h3>

<u>Focal length of convex lens is taken positive.</u>

:\implies\sf\:\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}

:\implies\sf\:\dfrac{1}{v}-\dfrac{1}{(-30)}=\dfrac{1}{20}

:\implies\sf\:\dfrac{1}{v}=\dfrac{1}{20}-\dfrac{1}{30}

:\implies\sf\:\dfrac{1}{v}=\dfrac{3-2}{60}

:\implies\:\boxed{\bf{\gray{v=60\:cm}}}

7 0
3 years ago
A 20.0-kg traffic light hangs midway on a cable between two poles 30.0 meters apart. If the sag in the cable is 0.40 meters, wha
hammer [34]

Answer:

the tension in each side of the cable is 3677.57 N

Explanation:

given data

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solution

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θ = 1.527 °

and

tension = mg

The net force is along x - axis is express as

T2 cosθ = T1 cosθ     .................2

so T2 - T1     ..............3

and

when we take it along y  axis  that is express as

( T1 + T2) sinθ = mg    ...................4

so by equation 3 we put here

2 × T1 sin(1.527) = 20 × 9.8  

T1 = 3677.57 N

7 0
4 years ago
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