27^@C এ একটি আদর্শ গ্যাসের rms বেগ হল 0.3 ms^(-1)। এর rms বেগ 927^@C (ms^(-1) এ...

The molecule of a given mas of gas have r.m.s. speed 200 ms^(-1) at 27^(@)C and 10^(5)Nm^(-2) pressure. When the absolute temperature is doubled and the pressure is halved, then find rms speed of the molecules of the same gas.

A stone is dropped into a well of depth 80 m . Splash of sound is heard after 4.25 sec . If g=10ms^(-2) , velocity of sound in air is A) 300 ms^(-1) ; B) 360 ms^(-1) ; C) 320 ms^(-1) ; D) 400 ms^(-1) ;

If the average velocity of N_(2) molecules is 0.3 ms^(-1) at 27^(@) C , then the velocity of 0.6 ms^(-1) will take place at

A flask has 10 molecules out of which four molecules are moving at 7 ms^(-1) and the remaining ones are moving at same speed of X ms^(-1) . If rms of the gas is 5 ms^(-1) , what is X ?

A body starts at t=0 with velcoity u and travels along a straight linge. The body has a constant acceleration(a). Draw the acceleration-time graph from t=0 to t=10 s for the following cases: a. u=8 ms^(-1) , a=2s^(-2) b. u=8 ms^(-1) , a=-2 ms^(-2) c. u=- 8ms^(-1) ,a=2 ms^(-2) d. u=-8ms^(-1) ,a=-2 ms^(-2) .

11. A boy wants to throw a ball from a point A so as to just clear the obstruction at B. The minimum horizontal velocity with which the boy should throw the ball is (A) 23.5 ms^(-1) (B) 47 ms^(-1) (C) 235 ms^(-1) (D) 32.5 ms^(-1)