D: Sóng có thể truyền qua khoảng không của không gian,
với tốc độ ánh sáng.
<span>Stress
Stress is a condition of mental strain or pressure on the body and coming about because of unfavorable or demanding conditions that the person cannot handle at that moment.</span>
The photoelectric emission is possible if the wavelength of the incident light is less than that of yellow light
Answer:
Nerve and muscle function and fluid balance
Explanation:
:)
Answer:
B) 100 J
Explanation:
Assuming the distance given is measured along the incline, the vertical change in height is (5 m)(sin 30°) = 2.5 m. Then the change in potential energy is ...
∆PE = mg(∆h) = (4 kg)(10 m/s^2)(2.5 m) = 100 J
