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3 years ago

Thermal conduction mostly involves the motion of

Physics

1 answer:

Iteru [2.4K]3 years ago

7 0

Thermal conduction mostly involves the motion of
ELECTRONS

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Can uh help in in this question step by step

Luda [366]

Initial velocity=u=72km/h

Convert to m/s

$\\ \sf \longmapsto 72\times \dfrac{5}{18}=5(4)=20m/s$

Final velocity=v=0m/s
Time=2s=t

$\\ \sf \longmapsto Acceleration=\dfrac{v-u}{t}$

$\\ \sf \longmapsto Acceleration=\dfrac{0-20}{2}$

$\\ \sf \longmapsto Acceleration=\dfrac{-20}{2}$

$\\ \sf \longmapsto Acceleration=a=-10m/s^2$

Distance be s

Using second equation of kinematics

$\\ \sf \longmapsto s=ut+\dfrac{1}{2}at^2$

$\\ \sf \longmapsto s=20(2)+\dfrac{1}{2}(-10)(2)^2$

$\\ \sf \longmapsto s=40+(-20)$

$\\ \sf \longmapsto s=40-20$

$\\ \sf \longmapsto s=20m$

Now

Mass=m=5000kg

Using newtons second law

$\\ \sf \longmapsto Force=ma$

$\\ \sf \longmapsto Force=5000(-10)$

$\\ \sf \longmapsto Force=-50000N$

Force is in opposite direction so its negative

$\\ \sf \longmapsto Force=50kN$

7 0

3 years ago

Read 2 more answers

The tune-up specifications of a car call for the spark plugs to be tightened to a torque of 47 N⋅m . You plan to tighten the plu

adelina 88 [10]

Answer:

$F =207.44\ N$

Explanation:

given,

torque = 47 N m

length of wrench = 25 cm = 0.25 m

angle with respective = 115°

The torque on the wrench

$\tau = L \times F$

$\tau = L F sin\theta$

$47 = 0.25\times F sin 115^0$

$F = \dfrac{47}{0.25\times sin 115^0}$

$F =207.44\ N$

The required force is equal to $F =207.44\ N$

6 0

3 years ago

WHAT IS COMPUTER ? EXPLAIN IT .

Alenkinab [10]

Answer: it's an electronic device

Explanation: it's where you store and process data, it acts according to the instructions given to it in a variable program.

Sorry if this wasn't the answer you were looking for.

3 0

4 years ago

PLEASE HELP ASAPPPPP

leva [86]

Answer:

link

Explanation:

ww.comhwhelp

4 0

3 years ago

A 6 cm object is 15 cm from a convex lens that has a focal length of 5 cm. What is the distance of the image from the lens, to t

Vesna [10]

Answer:

7.50 cm

Explanation:

The formula

1/v + 1/u = 1/f

Is used.

where.

u is the object distance.

v is the image distance.

f is the focal length of the lens.

1/v + 1/15 = 1/5

1/v = 1/5 - 1/15

1/v = (3-1)/15

1/v = 2/15

2v = 15

V = 15/2

V = 7.5 cm

For focal length, f in lens is always taken as negative for concave and positive for convex. ... And for image distance, V in lens it is taken as positive in Convex lens since image is formed on +X side. It is taken as negative in Concave lens since image is formed in -X side of the Cartesian.

4 0

3 years ago