In a classroom there are 13 boys and 11 girls. Average age of each boy and each girl is 23 years and 17 years respectively. The sum of ages of all the boys, girls and a teacher whose age is ‘x’ years is 540 years. Find the value of ‘x’.
Sum of ages of all boys = 13 x 23 = 299 Sum of ages of all girls = 11 x 17 = 187 So, 299 + 187 + x = 540 => x = 54
In order to investigate the internal atomic structure of crystals, we make use of:
What is the process of melting also called?
A stone thrown upward with a speed ’u’ from the top of the tower reaches the ground with a speed ‘3u’. The height of the tower is-
For CE-transistor amplifier, the audio signal voltage across the collected resistance of 3 k Ω is 3V. Assume the current amplification factor of the t...
The mass density of Kerosene is:
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2....
Specific heat of aluminum when 26000 J of energy is supplied to 4 kg block and it's temperature rises from 25°C to 35°C is
Cryogenics is a branch of Physics that deals with what?
Two long parallel conductors are placed 8mm apart from each other carrying a current of 120 Amperes. What will be force per meter length of each one?
