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3 years ago

9

A particle is projected from a point on a horizontal plane and has an initial velocity of 28root 3 m/s at an angle of 60 degree

.find the greatest heights reached by the particle

1 answer:

Lelechka [254]3 years ago

4 0

Answer:

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How many complete revolutions are needed to draw the angle 725°?

uysha [10]

C. A complete revolution is 360 degree. two revolution is 720.

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3 years ago

Read 2 more answers

Space debris left from old satellites and their launchers is becoming a hazard to other satellites. (a) Calculate the speed of a

Pie

Answer:

Part a)

$v = 7407.1 m/s$

Part b)

$v_{rel} = 1.05 \times 10^4 m/s$

Explanation:

Part a)

As we know that orbital velocity at certain height from the surface of Earth is given as

$v = \sqrt{\frac{GM}{R+h}}$

here we know that

$M = 5.98 \times 10^{24} kg$

$R = 6.37 \times 10^6 m$

$h = 900 km = 9.0 \times 10^5 m$

now we have

$v = \sqrt{\frac{(6.67 \times 10^{-11})(5.98 \times 10^{24})}{6.37 \times 10^6 + 9.0 \times 10^5}}$

$v = 7407.1 m/s$

Part b)

When a loose rivet is moving in same orbit but at 90 degree with the previous orbit path then in that case the relative speed of the rivet with respect to the satellite is given as

$v_{rel} = \sqrt{2} v$

$v_{rel} = 1.05 \times 10^4 m/s$

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3 years ago

How do electromagnetic forces work?

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4 years ago

WHAT ARE 5 EXAMPLES of REAL science

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Answer:

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3 years ago

What is Index of refraction?

Sphinxa [80]

Refractive Index is the measure of bending of light rays.

Explanation:

Index of refraction or Refractive Index is the measurement of the phenomenon exhibited by light rays - bending of light rays when passing from one medium to another.
It can also be measured as the ratio between speed of light in vacuum or empty space to that of the speed of light in a given medium.
Index of refraction is denoted by n and is calculated by the following formula

n = Speed of light in vacuum/Speed of light in the given medium = c/v

It can also be measured using the angle of incidence and angle of refraction.

n = sin i/sin r where i is the angle of incidence and r is the angle of refraction

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4 years ago