Câu 2. Chọn phát biểu đúng với vật thật đặt trước thấu kính. A. Thấu kính hội tụ luôn tạo chùm tia ló hội tụ.
B. Thấu kính phân kì luôn tạo chùm tia ló phân kì.
C. Ảnh của vật tạo bởi thấu kính không thể bằng vật.
D. Ảnh của vật qua thấu kính phân kì là ảnh thật.

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?