Câu 48. Cho mạch điện như hình vẽ: Đèn ghi 6V – 3W, B là bình điện phân (AgNO3/Ag) CÓ điện trở là Re. Ra rất nhỏ, Rv rất lớn.
V
Đ
• Khi ka mở vôn kế chỉ 9V
• Khi kì, ko đóng. (V) chỉ 6V và (A) chỉ 3,5A
a. Tính Ra, RP
b. Tính lượng Ag bám vào catod trong 32"10"
C. Bộ nguồn mắc như thế nào? Số pin sử dụng là bao nhiêu? Biết mỗi pin có e = 1,5V, L = 0,252.
d. Hiện tượng điện phân diễn ra như thế nào?

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?