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densk [106]
3 years ago
5

Write any three importance of Measurement.

Physics
1 answer:
NISA [10]3 years ago
3 0

Explanation:

The three importance of measurement are as follows :-

  1. <em>measurement </em><em>is </em><em>used </em><em>to </em><em>compare</em><em> </em><em>the </em><em>items</em><em> </em><em>when </em><em>barter </em><em>system</em><em> </em><em>takes </em><em>place</em><em> </em><em>.</em>
  2. <em>measurement</em><em> </em><em>helps </em><em>in </em><em>weighing</em><em> </em><em>the </em><em>foods </em><em>,</em><em> </em><em>groceries</em><em> </em><em>etc </em><em>.</em>
  3. <em>Measurement</em><em> </em><em>are </em><em>important</em><em> </em><em>in </em><em>laboratory</em><em> </em><em>when </em><em>there </em><em> </em><em>experiments</em><em> </em><em>is </em><em>being</em><em> </em><em> </em><em>taken</em><em> </em><em> </em><em>for </em><em>different</em><em> </em><em>purposes</em><em> </em><em>.</em>

<em>Hope </em><em>it</em><em> </em><em>is </em><em>helpful</em><em> to</em><em> you</em><em> </em>

<em>✌️</em><em>✌️</em><em>✌️</em><em>✌️</em><em>✌️</em><em>✌️</em><em>✌️</em>

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An empty train car of mass 2.0 x 10^4 kg coasts along at 10 m/s. A 3000-kg boulder is suddenly dropped vertically into the car.
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Answer:8.69 m/s

Explanation:

Given

mass of Empty train m=2\times 10^4 kg

velocity of car v=10 m/s

mass of Boulder M=3000 kg

Since no External force is acting therefore conserving Momentum

Train and boulder moves with same velocity after collision

m v=(M+m)v'

2\times 10^4\times 10=(2\times 10^4+3000)v'

v'=\frac{20,000\times 10}{23000}

v'=8.69 m/s

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3 years ago
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3 years ago
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A jet aircraft is traveling at 260 m/s in horizontal flight. The engine takes in air at a rate of 53.3 kg/s and burns fuel at a
IrinaVladis [17]

Answer:

The thrust of the jet engine is 4188.81 N.

Explanation:

Given that,

Speed = 260 m/s

Rate in air= 53.3 kg/s

Rate of fuel = 3.63 kg/s

Relative speed = 317 m/s

We need to calculate the rate of mass change in the rocket

Using formula of rate of mass

\dfrac{dM}{dt}=\dfrac{dM_{a}}{dt}+\dfrac{dM_{f}}{dt}

Put the value into the formula

\dfrac{dM}{dt}=53.3+3.63

\dfrac{dM}{dt}=56.93\ kg/s

We need to calculate the thrust of the jet engine

Using formula of thrust

T=\dfrac{dM}{dt}u-\dfrac{dM_{a}}{dt}v

Put the value into the formula

T=56.93\times317-53.3\times260

T=4188.81\ N

Hence, The thrust of the jet engine is 4188.81 N.

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4 years ago
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Alisiya [41]

The answer is option C) The car experienced negative acceleration with velocity in the positive direction.

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3 years ago
Ohm's Law for electrical circuits is stated Vequals​RI, where V is a constant​ voltage, R is the resistance in ohms and I is the
Annette [7]

Answer:

The resistance interval is  R  =  1.8 \pm  0.037

Explanation:

From the question we are told that

     The voltage is  V  =  9 V

      The current is  I = 5 \pm 0.1

The maximum current would be  

       I_{max} = 5 + 0.1 =  5.1 \ A

The minimum current would be  

      I_{min} = 5 -  0.1 =  4.9 \ A

The maximum resistance is  

      R_max =  \frac{V}{I_{min}}

     R_max =  \frac{9}{4.9}

     R_max =  1.837 \Omega

The minimum resistance is  

      R_{min} =  \frac{V}{I_{max}}

    R_{min} =  \frac{9}{5.1}

    R_{min} = 1.765 \Omega

and  R  =  \frac{9}{5}  =  1.8 \Omega

The  interval R  lies is  

        R  =  1.8 \pm  0.037

4 0
3 years ago
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