Related Questions

Why is weightlessness experienced while orbiting the earth in space ships ?
A Inertia
B Acceleration
C Zero gravity
D Orbital motion
Two ships are sailing in the sea on the two sides of a lighthouse . The of elevation of the top of the lighthouse an observed from the two ships are 30 degree and 45 degree respectively . If the lighthouse is 100 m high, the distance between the two ships is-
A 175m
B 200 m
C 27m
D 300m
Read the following passage carefully and then choose the right word to complete the sentence that follows. Rockets are very expensive as it can be used only once. Appled scientists have therefore develped a reusable space craft called a space shuttle which takes off like a rocket; however, does no get destroyed as it returns to earth. It can also be used to lunch satellired into space, retrieve them from space if any repairing os required and allow around 8 scientists to crryout experiments in space. The space shuttle does not get.
A flattened
B enlarged
C ruined
D developed
Two Ships leave a port at the same time.Ship A sails 300 miles to the West Ship B sails 400 miles to the North.How far apart are the ships at the end of their trips?
A 300 miles
B 400 miles
C 500 miles
D 900 miles
Two ships leave a port at the same time, Ship A sails 300 miles to West and Ship B Sails 400 miles to the North. How fat apart are the ships at the end of their trips?
A 300 miles
B 400 miles
C 500 miles
D 900 miles
→aIn flightsastronauts →bhave to bear muscle→catrophy caused weightlessness→dNo Error
A a
B b
C c
D d
If gravitational constant is decreasing with time, what will remain unchanged in case of a satellite orbiting around the earth?
A Time period
B Orbiting radius
C Areal velocity
D Angular velocity
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
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
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
A granite
B basalt
C igneous rocks
D sedimentary rocks

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