How many times will the wheel of a car rotate in a journey of `24.2`km if the diameter of the wheel is `77` cm.

A bicycle wheel makes 5,000 revolution in moving 11 km. Find the diameter of the wheel.

The activation energy of a reaction is 75.2 KJ mol^-1 in the absence of a catalyst and 50.14 Kjmol^-1 with a catalyst. How many times will the rate of reaction grow in the presence of the catalyst if the reaction proceeds at 25^@C ? (R = 8.314 JK^-1mol^-1)

The wheels of a car move 5 times in a second.If the diameter of a wheel is 84 cm.Find the speed of the car in km/hr.

A car is moving form rest. After 10 seconds its wheels rotate 360 times in 1 minute. If the radius of the wheel is 50cm. Then find angular acceleration

A car is moving from rest. After 10 seconds its wheels rotate 360 times in 1 minute. If the radius of the wheel is 50cm. Then find angular velocity after 30 seconds.

A car is moving from rest, After 10 seconds its wheels rotate 360 times in 1 minute. If the radius of the wheel is 50cm, then find the linear distance travelled in 6 minutes.

A car is moving from rest, After 10 seconds its wheels rotate 360 times in 1 minute. If the radius of the wheel is 50cm, then find angular acceleration.

A car is moving from rest, After 10 seconds its wheels rotate 360 times in 1 minute. If the radius of the wheel is 50cm, then find angular velocity after 30 seconds

A bucket made up of a metal sheet is in the form of a frustum of a cone. Its depth is 24 cm and the diameters of the top and bottom are 30 cm and 10 cm respectively. Find the cost of milk which can completely fill the bucket at the rate of ₹ 20 per litre and the cost of metal used, if its cost ₹ 10 per 100 cm^2 (pi = 3.14) .

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 .