Improvement in Food Resources — Science STD 9 — Question

Crop rotation is employed for:

Name the sounds of the frequencies given below 10Hz.

An object of mass 2kg is sliding with a constant velocity of 4m/s on a frictionless horizontal table. The force required to keep this object moving with the same velocity is:

1. 32N
2. 0N
3. 2N
4. 8N

Rinku and Pinku had half day schools during summer. They used to go to school by autorickshaw. They observed that the auto driver covered the top of the vehicle by some mats and sprinkled water on them regularly, which keeps it cool. Which of the following phenomena is involved here:

Which is Potential Energy?

In angiosperms:

1. Xylem possess vessels.
2. Phloem has sieve tubes and companion.
3. Flowers are reproductive structures.
4. All the above.

Which of the following statement defines hypertonic solution:

Pick out the wrong statement about retardation:

The value of g on the surface of moon is:

A coconut fruit hanging high in a palm tree has ......... owing to its location: