If doubly ionised lithium atom is hydrogen like with atomic number 3, the wavelength
If doubly ionised lithium atom is hydrogen like with atomic number 3, the wavelength of radiation required to excite the…
8 years ago
Physics
Activity of a radioactive sample decreases to (1/3)rd of its original value
Activity of a radioactive sample decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its…
8 years ago
If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm
If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm, then the ratio of…
8 years ago
Four identical rods are joined to from a square. If the temperature difference
Four identical rods are joined to from a square. If the temperature difference across one diagonal is 100° C, then…
8 years ago
A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest
A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest its time period…
8 years ago
The length of second pendulum is 1 m on earth. If mass and diameter
The length of second pendulum is 1 m on earth. If mass and diameter of the planet is double than…
8 years ago
Four point masses, each of value m, are placed at the corners of a square ABCD
Four point masses, each of value m, are placed at the corners of a square ABCD of side l. The…
8 years ago
The distance travelled by a particle starting from rest and moving
The distance travelled by a particle starting from rest and moving with an acceleration 4/3 ms⁻², in the third second…
8 years ago
An aeroplane is flying horizontally with a velocity of 216 km/h at a height of 1960 m.
An aeroplane is flying horizontally with a velocity of 216 km/h at a height of 1960 m. When it is…
8 years ago
The angle between the vectors (i+j) and (j+k) is
The angle between the vectors (i+j) and (j+k) is Options (a) 90⁰ (b) 60⁰ (c) 30⁰ (d) 45⁰ Correct Answer:…
8 years ago