A ray of light along x+3y=3gets reflected upon reaching x-axis, the equation of the reflected rays is
Two stones are thrown up simultaneously from the edge of the cliff 240 m high with initial speed of 10 m/s and 40 m/s respectively. Which of the following graph best represents the time variation of relative position of the second stone with respect to the first ?
(Assume stones do not rebound after hitting the ground and neglect air resistance, take g=10m/s2)
(The figure are schematic and not drawn to scale)
The vapour pressure of acetone at 20∘C is 185 torr. When 1.2 g of a non - volatile substance was dissolved in 100 g of acetone at 20∘C, its vapour pressure was 183 torr. The molar mass (gmol−1) of the substance is :
Match List - I (Fundamental Experiment) with List - II (its conclusion) and select the correct option from the choice given below the list :
If A=⎣⎡12a2122−2b⎦⎤ is a matrix satisfying the equation AAT=9I, where I is 3×3 identity matrix, then the ordered pair (a,b) is equal to :(A) (2,−1) (B) (−2,1) (C) (2,1) (D) (−2,−1)
The amplitude of a damped oscillator decreases to 0.9 times its original magnitude is 5s. In another 10s it will decrease to α times its original magnitude, where α equals.