Một lượng khí ôxy khối lượng 160g được nung nóng từ nhiệt độ 500C đến 600C. Tìm nhiệt lượng mà khí nhận được và độ biến thiên nội năng của khối khí trong hai

quá trình:

a. Đẳng tích.

b. Đẳng áp

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

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.

Do you think you could give me the answers to #29?