An object that floats in water weighs 20 N in air. a. What is the weight of the object in water?
b. What is the Upthrust acting on the object in water?
c. What is the weight of the water displaced by the object?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)