একটি ট্রেন ` 100 m` বরাবর ` 60 h^(-1)` বেগ নিয়ে চলছে। ক্রস হতে সময় লাগে

A train 100 m along is moving with a velocity of 60 h^(-1) . The time it takes to cross the bridge 1km long is.

It has been experimentally observed that the electric field in a large region of earth's atmosphere is directed vertically down. At an altitude of 300 m, the electric field 60 Vm^(-1) . At an altitude of 200 m, the field is 100 V m^(-1), the field is 100 Vm^(-1) . Calculate the net amount of charge contained in the cube of 100 m edge, located between 200 and 300 m altitude.

From the top of a tower of height H, identical bodies,A and B ,are thrown horizontally with velocities 100m s^(-1) and 50m s^(-1) in the same direction at the same instant. Then

Conductivity of 0.01M NaCl solution is 0.00147 ohm^(-1) cm ^(-1) . What happen to this conductivity if extra 100m L of H_(2)O will be added to the above solution?

Two trains 120m and 100 m in length are tunning in opposite directions with velocityes 42 km h^(-1) and 30 km h^(-1) In what tiem they will completely cross each other ?

What should be the coefficient of friction between the tyres and the road, when a car travelling at 60 km h^(-1) makes a level turn of radius 40 m ?

Calculate the normality of mixture obtained by mixing a. 100 mL of 0.1 N HCl + 50 mL of 0.25 N NaOH b. 100 mL of 0.2 M H_(2) SO_(4) + 200 mL of 0.2 M HCl c. 100 mL of 0.2 M H_(2) SO_(4) + 100 mL of 0.2 M NaOH d. 1g equivalent of NaOH + 100 mL of 0.1 N HCl

The ratio of amounts of H_(2)S needed to precipitate all the metal ions from 100 ml of 1 M AgNO_(3) and 100 ml of 1 M CuSO_(4) will be