What is the velocity of a wave that has a frequency of 2,500 Hz and a wavelength of 2.5 meters? 1,225 m/s
5,000 m/s
500 m/s
50 m/s

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

Explain what happens at the saturation point when adding salt to water at room temperature.