Let present age of father and son be 9x and 4x respectively. According to question, => (9x – 2) (4x – 2) = 34 × (4x – 2) => (9x – 2) = 34 => 9x = 36 => x = 4 Therefore, son’s age 4 years ago = (4x – 4) = 12 years
In which type of motion does the velocity of a body vary with time?
A meter stick moves along its length with a certain speed. The apparent length of the moving meter stick as measured by a stationary observer on the gr...
A positron is an anti-particle of an electron, having the same mass but opposite charge to electron. Then, the minimum energy released in annihilation ...
What is the momentum of an object of mass 1/2 m, moving with a velocity of 2V?
The reason for a swimming pool to appear less deep than the actual depth is –
The refractive indices of quartz crystal for right handed and left handed circularly polarized light of wavelength 762.9 nm are 1.5391 and 1.5392 respe...
Sounds of frequencies less than about ______ vibrations per second cannot be detected by the human ear.
An example of longitudinal waves (in a gas medium) is:
What is the angle between centripetal acceleration and tangential acceleration?
In MRI machine, which one of the following is used?
