Thermal and Chemical Effect of Current — Physics STD 11 Science — Question

A coolie with load on his head is walking on a horizontal plateform. What is work done against gravity?

If a constant force acts on a particle, its acceleration will:

1. Remain constant.
2. Gradually decrease.
3. Gradually increase.
4. Be undefined.

Why does a small mercury drop assume a spherical shape?

The nucleus is at rest in the laboratory frame of reference. Show that if it disintegrates into two smaller nuclei, the products must be emitted in opposite directions.

If velocity of light c, Planck’s constant h and gravitational contant G are taken as fundamental quantities then express mass, length and time in terms of dimensions of these quantities.

What is the apparent weight felt by a person in an elevator, when it is accelerating: (i) upward (ii) downward?

Tell the position of the center of mass of a disc, hollow disc, cube, solid sphere, hollow sphere etc.

Does the radius of gyration depend upon the speed of rotation of the body?

During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000Pa. At what height must the blood container be placed so that blood may just enter the vein? [Use the density of whole blood from Table 10.1].