Khi ở núi cao vào buổi sáng sớm, nhìn về hướng mặt trời mọc, ta thấy đường truyền của tia sáng mặt trời trong không khí rõ nét. Tại sao?

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

More solar radiation is absorbed by earth’s surface than by

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.