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Total age of 12 girls = 12 x 35 = 420 years If the age of two more girl is added the average decreases by one and a half year, Total age of 14 girls = 33.5 x 14 = 469 Now, sum of the age of new girls= 469 - 420 = 49 years
What is the momentum of an object of mass 1/2 m, moving with a velocity of 2V?
A 4 cm wire carrying a current of 15 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27...
A spherical black body with a radius of 8 cm radiates 450-watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated...
The rate of transfer of charges through a circuit is called?
A brass boiler has a base area of 0.2 m2 and thickness 1.0 cm. It boils water at the rate of 6.0 kg/min when placed on a stove. Calculate th...
If a medium has a critical angle for total internal reflection from the medium to vacuum as 90°, what is the velocity of light in the medium? (Take c =...
What is the focal length of a plane mirror?
In the equation of motion ( v = u + at ), ( u) represents:
Which of the following is the best conductor of electricity?
Which of the following is NOT a non-contact force?
