If someone travels 3000 feet in one second, how far will it travel in 18 minutes

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

In a good thermo flask the main cause of heat loss is

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.