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টেক্সটাইল ইঞ্জিনিয়ারিং

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2201. MCQPractice set · Question 53

G-এর numerical value কোন বিষয় নির্দেশ করে?

a.
gravity-এর universal strength
b.
local g only
c.
mass of Earth
d.
escape speed

Correct answer: a

G universal gravitational interaction-এর proportionality constant।

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2202. MCQPractice set · Question 54

g ও G-এর মধ্যে সঠিক পার্থক্য কী?

a.
G universal constant, g local acceleration
b.
দুটিই একই
c.
g universal constant
d.
G acceleration

Correct answer: a

G universal; g=GM/R² এবং location অনুযায়ী বদলায়।

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2203. MCQPractice set · Question 55

G-এর value Earth ও Moon-এ কেমন?

a.
একই
b.
Moon-এ কম
c.
Earth-এ বেশি
d.
zero

Correct answer: a

G universal constant।

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2204. MCQPractice set · Question 56

g-এর value Earth ও Moon-এ কেমন?

a.
ভিন্ন
b.
একই
c.
G-এর সমান
d.
zero দুটিতেই

Correct answer: a

g local planetary mass ও radius-এর উপর নির্ভর করে।

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2205. MCQPractice set · Question 57

Escape velocity-এর energy condition কী?

a.
total energy at infinity zero
b.
kinetic energy zero at surface
c.
potential energy positive at surface
d.
force zero at surface

Correct answer: a

Minimum escape trajectory-তে infinity-তে K ও U উভয় reference অনুযায়ী total E=0।

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2206. MCQPractice set · Question 58

Escape velocity-এর সঙ্গে planet-এর radius কী relation রাখে?

a.
inverse square-root
b.
direct
c.
square
d.
no relation

Correct answer: a

v_e=√(2GM/R)।

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2207. MCQPractice set · Question 59

Escape velocity-এর সঙ্গে planet mass কী relation রাখে?

a.
square-root proportional
b.
inverse square
c.
direct square
d.
no relation

Correct answer: a

v_e∝√M।

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2208. MCQPractice set · Question 60

Orbital velocity-এর সঙ্গে radius কী relation রাখে?

a.
v∝r⁻¹/²
b.
v∝r
c.
v∝r²
d.
v constant

Correct answer: a

v=√(GM/r)।

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2209. MCQPractice set · Question 61

Orbital period-এর সঙ্গে radius কী relation রাখে?

a.
T∝r^{3/2}
b.
T∝r⁻¹/²
c.
T∝r
d.
T constant

Correct answer: a

Kepler third law থেকে T²∝r³।

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2210. MCQPractice set · Question 62

Satellite-এর kinetic energy circular orbit-এ কী?

a.
GMm/(2r)
b.
GMm/r
c.
−GMm/(2r)
d.
0

Correct answer: a

K=½mv² এবং v²=GM/r।

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