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3 years ago

The centre of mass of a metre rule is at the 50cm mark. state what is meant by Centre of mass

Physics

1 answer:

Tanya [424]3 years ago

3 0

Answer:

Centre of mass of any body is a point where all mass of a body is supposed to be concentrated

it lies in geometrical centre....

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The sun is 1.5 × 108 km from Earth. The index of refraction for water is 1.349. How much longer would it take light from the sun

tankabanditka [31]

Answer:

175s

Explanation:

time it takes sunlight to reach the earth in vacuum

C=light speed=299792458m/s

X=1.5x10^8km=1.5x10^11m

c=X/t

T1=X/c

T1=1.5X10^11/299792458=500.34s

time it takes sunlight to reach the earth in water:

First we calculate the speed of light in water taking into account the refractive index

Cw=299792458m/s/1.349=222233104.5m/s

T2=1.5x10^11/222233104.5m/s=675s

additional time it would take for the light to reach the earth

ΔT=T2-T1=675-500=175s

4 0

3 years ago

Vector addition of a=8km[E] and b=13km[E]

AlladinOne [14]

The answer to the question is 21 km towards east.

CALCULATION:

Let us consider two vectors $\vec A \ and\ \vec B$

As per the question, $\vec A=8\ km\ towards\ east$

$\vec B=\ 13\ km\ towards\ east$

It is obvious that two vectors are parallel to each other. Hence, the angle between them is zero i.e $\theta\ = 0^0$

We are asked to calculate the resultant .

As per parallelogram law of vector addition, the magnitude of resultant will be-

$R=\sqrt{A^{2} +B^{2} +2ABcos\theta}$

$=\sqrt{8^2+13^2+2\times 8\times13 cos0}$

$=\sqrt{64+169+208}$ [∵ cos0 = 1]

$=\sqrt{441}\ km$

$=\ 21\ km$

The direction of the resultant will be also towards east as the two vectors are parallel to each other.

Hence, the vector addition of two vectors are 21 km towards east.

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3 years ago

Which of these statements accurately captures a current trend in operations? A. There is increased focus on local market and lo

Flura [38]

Answer:

Option B

Explanation:

The current trend in operations is accurately captured by Rapid Product Development.

This concept in an organization describes a process in development which is quite fast and progressive.

To achieve rapid Product Development, a combination of integration of various innovative and creative prototyping techniques including latest Computer supportive operative tools, i.e., CSCW are used.

These tools are incorporated into the process of Research and Development in an organization in order to develop products by optimization of quality, price and time.

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3 years ago

1. 10. waves break on the beach in 2.0 min. What is the frequency in hertz of these waves (cycles per

never [62]

Answer:

there it is fella tried o. ma own consciousness

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3 years ago

If you pitch a baseball with twice the kinetic energy you gave it in the

Kaylis [27]

Answer:

the magnitude of momentum is √2≈ b

Explanation:

hope that helped

7 0

3 years ago

The centre of mass of a metre rule is at the 50cm mark. state what is meant by Centre of mass​

The centre of mass of a metre rule is at the 50cm mark. state what is meant by Centre of mass