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Force can produce three effectsâ€”
1. It can change the magnitude of velocity of an object.
2. It can change the direction of motion of the object.
3. It can change the shape or size of the object.
Some insectivorous plants are partially heterotrophic also. They have various means of capturing insects so as to supplement their diet with required nutrients derived from insects, causing proliferation of growth. The examples include pitcher plant (Nepenthes), Venus fly trap, bladderwort, and sundew plant.
Following are the disadvantages of friction :
(1) Friction leads to a loss of energy and thus reduces the efficiency of machines.
(2) Friction causes wear and tear of machine parts.August 29, 2011 at 9:20 am in reply to: Emitter is heavily doped while collector is moderately doped #9282
Answer) There are two main differences between emitter and collector of a transistor construction wise. First emitter is heavily doped while collector is moderately doped. Second the area of the collector is larger than the emitter.So output will be maximum.August 29, 2011 at 9:20 am in reply to: Why can a small mass such as a bullet kill a person when fired from a gun ? #9281
It is so because even if the mass of the bullet is small, it moves out of the gun with a very high velocity, due to which the momentum produced is high (p = mu). This high momentum of the bullet kills a person.
Based on the position of the calyx, corolla, and androecium (with respect to the ovary on the thalamus), the flowers are described as hypognous, perigynous, and epigynous.
In hypogynous flowers, the ovary occupies the highest position on the thalamus while other floral parts are situated below it. In such flowers, the ovary is superior e.g., China rose, mustard etc.
In perigynous flowers, the ovary is situated at the centre and other floral parts are arranged on the rim of the thalamus. The ovary here is said to be half inferior e.g., plum, rose, peach
In epigynous flowers, the thalamus grows around the ovary fusing with its wall. The other floral parts are present above the ovary. Hence, the ovary is said to be inferior e.g. flowers of guava and cucumber.August 29, 2011 at 9:15 am in reply to: Write the mathematical formula of the second law of motion. #9269
The mathematical formula of second law of motion is F = ma.
Second law of motion gives us a method to measure the force acting on an object as force is the product of its mass and acceleration.August 29, 2011 at 9:13 am in reply to: Give few examples of Newton's third law of motion. #9264
(1) Jet aeroplanes and rockets work on the principal of third law of motion.
In this case, the hot gases come out of a nozzle with great force i.e. action, and the rocket moves with high speed upwards as a reaction.
(2) If we fill a balloon with air and hold it with its mouth downwards then when release the balloon, the air rushes out vertically downwards (action). The balloon moves vertically upwards (reaction).
The androecium or the stamen is the male reproductive part of a flower. It consists of two parts, the filament and the bilobed anther. The bilobed anther is the site for meiosis and the generation of pollen grains.
The corolla of a flower is a layer that lies inside the calyx. It contains beautifully coloured petals, which help in attracting insects for pollination. When the petals are free, they are called polypetalous, while fused petals are called gamopetalous.