Physics
A nucleus 11Na24 emits a β-particle to change into magnesium (Mg).
(a) Write the symbolic equation for the process.
(b) What are numbers 24 and 11 called?
(c) What is the general name of 1224Mg with respect to 1124Na
Related Questions
A student stands 330 m from a tall cliff which is 990 m from another tall cliff.
The student fires a pistol and hears some echoes. If the speed of sound between the cliffs is 330 m/s,
(a) What is the time taken by first echo to reach the student?
(b) Find the time interval between the first echo and the second echo.
If a man raises a box of 50 kg mass to a height of 2 m in 2 min, while the other man raises the same box to the same height in 5 min. Compare
(a) the work done and
(b) the power developed by them.
(a) Name the time phenomenon involved in tuning a radio set to a particular station.
(b) Define the phenomenon named by you in part (a) above.
(c) What do you understand by loudness of sound?
(d) In which unit, is the loudness of sound measured?
(a) What is meant by static equilibrium? Give one example.
(b) A pulley system has four pulleys in all and is 95% efficient. Calculate
- MA
- Effort required to lift a load of 1000 N