Related Questions

পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)
A 36 N and 81 N
B 36 N and 40.5 N
C 36 N and 20.25 N
D 98 and 40.5 N
E 81 N and 81 N
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be
A four times the first one
B same as the first one
C one fourth of the first one
D one and a half times the first one
একজন অ্যাথলেট পৃথিবীতে দীর্ঘ লাফ দিয়ে সর্বোচ্চ 4 m দূরত্ব যেতে পারেন। এই অ্যাথলেট চাঁদের পৃষ্ঠে দীর্ঘ লাফ দিয়ে সর্বোচ্চ কত দূর যেতে পারবেন ? [পৃথিবীর ভর ও ব্যাসার্ধ চাঁদের ভর ও ব্যাসার্ধের যথাক্রমে 81 গুণ ও 4 গুণ] (An athlete can cross a maximum distance 4 m by a long jump on earth surface. What is the maximum distance the athlete can cross by a long jump on moon's surface? [The mass and radius of earth are 81 times and 4 times of moon's mass and radius, respectively.])
A 0.79m
B 9 m
C 20.25 m
D 16 m
E 32.35 m
A body has a weight W on the surface of Earth. What is its weight on a planet whose mass is 15 times that of Earth and a radius that is 4 times that of the earth?
A 15\/4 W
B 16\/9 W
C 16\/7 W
D 16\/15 W
চাঁদের অভিকর্ষজ ত্বরণ পৃথিবীর অভিকর্ষজ ত্বরণের ছয় ভাগের এক ভাগ। চাঁদের ব্যাসার্ধ পৃথিবীর ব্যাসার্ধের এক- চতুর্থাংশ। পৃথিবীর ভর M-এর তুলনায় চাঁদের ভর কত? (The acceleration due to gravity on the Moon is one-sixth of that on the Earth. The radius of the Moon is one-fourth that of the Earth. What is the mass of the Moon compared to that of the Earth, M?)
A M/6
B M/16
C M/24
D M/96
Owing to the equatorial bulge and the polar flattening, the polar radius of the earth falls short of the equatorial radius by about ________
A 22 km
B 36 km
C 41 km
D 53 km
In 2007, the arithmetic mean of the annual incomes of Rahim and Karim was Taka 3800 . The arithmetic mean of the annual incomes of Karim and Ripon was Ripon and Rahim was TaKa5800. What is the arithmetic mean of the incomes of the three ?
A 3200
B 1200
C 2400
D 4800
The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?
A 18.50
B 17.75
C 18.75
D 18.25
A cylindrical rod of iron, whose height is equal to its radius ,is melted and cast into spherical balls whose radius is half the radius of the rod. find the number of balls.
A 3
B 4
C 5
D 6
A cylindrical rod of iron, whose height is equal to its radius, is melted and cast into spherical balls whose radius is half the radius of the rod . Find the number of balls.
A 2
B 3
C 4
D 6

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