A solid sylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 ms⁻¹. It collides with a horizotal spring of force contstant 200 Nm⁻¹. The maximum compression produced in the spring […]
A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when […]
A car of mass m is moving on a level circular track of radius R. If µs represents the static friction between the road and tyres of the car, the maximum speed of the car […]
A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is :
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(a) […]
The motion of a particle along a straight line is described by equation : x= 8 + 12t– t³ where x is in metre and t in second. The retardation of the particle when its […]
When one single organism or the pair of organisms is correctly assigned to its or their named taxomonic group
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(a) Paramecium and plasmodium belong to the same kingdom as that of penicillium […]
Read the following five statements (A – E) and answer the question. (A)In Equisetum the female gametophyte is retained on the parent sporophyte. (B)In Ginkgo male gametophyte is not independent. (C) The sporophyte in Riccia […]
How many plants in the list given below have marginal placentation? Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin
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(a) Four (b) Five (c) Six (d) […]
Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses
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(a) Diplontic life cycle (b) Members of kingdom plantae (c) Mode of Nutrition (d) Multiplication by fragmentation
Compared to those of humans, the erythrocytes in frog are
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(a) Without nucleus but with haemoglobin (b) nucleated and with haemoglobin (c) very much smaller and fewer (d) nucleated and without haemoglobin
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