Physics
(a) When does the nucleus of an atom tend to become radioactive?
(b) Name a single pulley in which displacement of load and effort is not the same.
(c) State one advantage of this pulley.
Related Questions
When a ray of light travels normal to the given surface, then the angle of refraction is:
- 180°
- 90°
- 0°
- 45°
Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle is due to the:
- reflection
- refraction
- dispersion
- total internal reflection
The diagram shows wheel O pivoted at point A. Three equal forces F1, F2 and F3 act at point B on the wheel.
(a) Which force will produce maximum moment about A?
(b) Give a reason for your answer in (a).
(a) What is the position of centre of gravity of a triangular lamina?
(b) When this triangular lamina is suspended freely from any one vertex, what is the moment of force produced by its own weight in its rest position?