Synthetic Fibres and Plastics — Science STD 8 — Question

Brahma rolls down a ball from a certain height along an inclined plane. After reaching the bottom of the inclined plane, the ball rolls some distance horizontally along a surface. Brahma uses four different objects as the horizontal surface at the bottom of the inclined plane. The four objects are frosted glass sheet, cardboard sheet, sand paper, and wrinkle-free towel. In each case, he measures the distance travelled by the ball from the bottom of the inclined plane along the horizontal surface. On which surface will the ball move the least distance?

Which of the following should an adolescent choose for his/her meal?

Citrus canker is a common disease of

During fractional distillation, the crude petroleum is heated to.

Rhizobium bacteria live in the root nodules of which plants?

Which one of the following crops does not require nitrogenous fertiliser?

The impression or sensation remains on the retina for about how many seconds even after removal of the object.

Rougher Surfaces have:

Which of the following is major source of water pollution?