The co-efficient of line expansion brass is` 2*10^-5°C^-1`, By how much the temperature of a brass rod be increased so as increase its length by 4%.

The co-efficient of volumn expansion of a liquid is 49*10-5 C^-1 ,By what percentage does its density change on raising the temperature by 50°C?

The coefficient of volume expansion of glycerin is 49 XX 10^-5 K^-1 What is the fractional change in its density for a 30 ^@C rise, in temperature?

A carnot's engine has an efficiency of 50% when its sinks temperature is 27 degree C what must be the change in its source temperature for increasing its efficiency of 60% ?

The length of a cube is 10^@C is 10 cm. If temperature is increased to 30^@C what is the change in volume. (alpha = 7.2 xx 10^-5l^0C) .

The length of a simple pendulumis increased by 1%. Its time period will

A large steel wheel is to be fitted on to a shaft of the same material. At 27 ^@C , the outer diameter of the shaft is 8.70 cm and the diameter of the central hole in the wheel is 8.69 cm. The shaft is cooled using ‘dry ice’. At what temperature of the shaft does the wheel slip on the shaft? Assume coefficient of linear expansion of the steel to be constant over the required temperature range: a_ steel = 1.20 xx 10^-5K^-1 .

A first order reaction has a rate constant of 10^(-2)s^( -1) . How much time will be taken for 20g of the reactant to be reduced to 5g?

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method:The area of rectangle gets reduced by 9 square units,if its length is reduced by 5 units and breadth is increased by 3 units.If we increase the length by 3 units and the breadth by 2 units,the ares increases by 67 square units.Find the dimensions of the rectangle.