Question

SAT2 物理题

求问SAT2的物理题目：

1.The international Space Station is currently under construction. Eventually,simulated earth gravity may become a reality on the space station. What would be the gravitational field through the central axis be like under these conditions?
答案：zero

2. An electric current is applied to a gas discharge tube, causing it to glow.When the discharge is viewed through a spectroscope,which type of spectrum is seen?
答案：Line spectra

3.DeBroglie theorized that all moving objects emit waves(matter waves)based on their momentum (λ=h/mv).Accordingly,as your team's defensive end,it is your job to stop the other team's 250 pound fullback. If you could hear the fullback's matter waves and you listened as the opposing fullback received the ball and accelerated toward you, what sound would you hear?
答案：An increase in loudness and an increase in frequency.

4.A radioactive isotope of iodine has a half-life of 8 hours and causes a counter to register 180 counts/min.Find the count rate for this sample of iodine two days later.
答案：2.8/min

谢谢！

Answer 1

1.在国际空间站目前正在施工中。最终，模拟的地球重力可能在空间站上成为现实。在这些条件下通过中轴线的引力场是什么样子？

2。电流应用于气体放电管，导致其发光。当放出的光通过分光镜，是看到哪种类型的谱？

3德布罗意理论认为所有移动对象发出波 （物质波） 基于他们的势头（波前端）(λ = h/mv)。如果，当你是球队的防守端，你的任务是阻止其他球队的250磅的后卫。如果你能听到后卫的物质波你听对方后卫接到球并加速走向你，你会听到什么声音？
答案：响度和频率增加地声音。

4，放射性碘同位素有8小时的半衰期，初始时使计数器计数180 / min.那么两天后计数器的示数是多少？