Atoms and Molecules — Science STD 9 — Question

A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is:

The speed of a moving object is determined to be 0.06m/s. This speed is equal to:

1. 2.16km/h
2. 1.08km/h
3. 0.216km/h
4. 0.0216km/h 

The growing two or more crops at a time in a field is called as:

The energy absorbed by a solar panal is used to charge a battery. During the day, the battery stores 1.6J of energy each second. At night the battery is used to light a 1.2W lamp for 18000s.
What is the minimum time for which the battery must be charged within the day?

Which of the following activity proves that particles of matter have space between them:

Which one has higher frequency?

Xylem is made of:

If a satellite is revolving around a planet of mass M in an elliptical orbit of semi-major axis a, find the orbital speed of the satellite when it is at a distance r from the focus.

Onion peel is used to demonstrate:

Which of the following tissues has dead cells?