৭৩৫১
The time period of a second pendulum has been increased. To make its time period 2s, its length will be.
উত্তর
Increased
৭৩৫৫
Lead cadmium and mercury are all examples of water pollutants called:
উত্তর
Heavy metals
৭৩৫৬
The angle of contact between a glass capillary tube of length 10 cm and a liquid is 90 degree. If the capillary tube is dipped vertically in the liquid, then the liquid:
উত্তর
Will neither rise nor fall in the tube.
৭৩৫৭
A toy rocket is launched straight up. At the exact top-of its' flight path, which of the followings is true?
উত্তর
Its velocity is zero and acceleration is 9.8 m/s2
৭৩৬০
At standard pressure the temperature at which ice melts into water is called
উত্তর
Melting point