A force F is applied to a body P as shown in the diagram above. If the body P moves through a distance r, which of the following represents the work done?
See more
1990
Which of the following pairs of light rays shows the widest separation in the spectrum of white light?
See more
1990
A radioactive substance has a half-life of 3 minutes. After 9 minutes, the count rate was observed to be 200. What was the count rate at zero time?
See more
1990
To keep a lorry moving at a constant speed v, requires power p, from the engine. The force provided by the engine is
See more
1990
Which of the following pairs of light rays shows the widest separation in the spectrum of white light?
See more
1990
Which of the following is/are TRUE of nuclear fission? I. A heavy nucleus is split into two nuclei of comparable masses II. Two light nuclei are joined together to form a heavier nucleus III. The total mass of the produc…