Current Electricity — Science STD 9 — Question

Newton’s laws and conservation of momentum.

Plants from Pteridophyta group have well developed roots, stem and leaves and separate …………….. for conduction of food and water. But,
they do not bear …………….. and ……………… They reproduce with the help of …………….. formed along the back or posterior surface of their leaves. Examples are ferns like Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium, etc. These plants reproduce …………….. by spore-formation and sexually by …………….. formation. They have a well-developed conducting system.

:Different species of Clostridium bacteria and the diseases caused by them.

Complete the following table:

In physics, ………….. is the rate of doing work or, i.e., the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the ………….. equal to one ………….. per second.

Power is a ………….. quantity that requires both a change in the physical system and a specified time interval in which the change occurs. But more ………….. is needed when the work is done in a shorter amount of time.

Nitrogen Cycle

Phanerogams plants which have special structures for …………….. and produce …………….. In these plants, after the process of reproduction, seeds are formed which contain the …………….. and stored food. During germination of the seed, the stored food is used for the initial growth of the embryo. Depending upon whether seeds are enclosed in …………….. a or not, phanerogams are classified into …………….. and ……………. .

Metal oxide + Dilute acid → SaIt + Water

………….. is the measure of energy transfer when a force (F) moves an object through a ………….. (d). So when ………….. is done, energy has been transferred from one energy store to another, and so: energy transferred = ………….. done. Energy transferred and work done are both measured in ………….. (J)

Transformation of energy
https://api.studentbro.in/NCERTSOLUTION//wp-content/uploads/2021/01/Maharashtra-Board-Class-9-Scienc..." alt="Maharashtra Board Class 9 Science Solutions Chapter 2 Work and Energy 17" width="600" height="" srcset=" 604w,  300w" sizes="(max-width: 604px) 100vw, 604px" />