Physics
The diagram below shows a vibrating tuning fork E mounted on a sound box X. When the vibrating tuning forks A, B, C and D are placed on the sound box Y one by one, it is observed that a louder sound is produced when the tuning fork B is place on Y.
(a) What is the frequency of tuning fork E?
(b) Why does B produce a louder sound?
Related Questions
(a) From the graph of heating curve given below state the melting point and boiling point of the substance.
(b) Complete and rewrite the following nuclear reaction by filling in the blanks.
235U ⟶ + 90Th + 42He
(a) What is nuclear energy?
(b) After emission of a nuclear radiation, the atomic number of the daughter nucleus increases by 1. Identify the nuclear radiation.
(c) Write a nuclear reaction indicating the nuclear change mentioned in (b).
(d) What is the special name given to the parent and daughter nucleus when this radiation is emitted?
Study the below figure and answer the following :
(a) What type of vibration does the figure represent?
(b) State one reason for which the amplitude of the vibration decreases with time.
(c) Write an example of natural vibrations.
An appliance rated 440 W, 220V is connected across 220V supply.
(a) Calculate the maximum current that the appliance can draw.
(b) Calculate the resistance of the appliance.