Thiết bị nào sau đây không phải là nguồn điện A. Ắc quy
B. Pin
C. Máy phát điện
D. Bóng đèn điện

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Who was the first scientist to measure speed as distance over time?

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?