作业帮SAT2 物理题 求解答
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SAT2 物理题 求解答
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!
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!
1.如果国际空间站靠旋转离心来模拟重力场,那么中轴线处的重力场是零
2.给气体放电管通电,气体发光,光线透过分光镜看到的光谱是线状光谱
3.···假如你能听到对方后卫的德布罗意波,那么当他从你身后加速向你冲来时,你应该听到“响度变大,同时频率也在升高”（多普勒）
4.一种碘的放射性同位素半衰期是8小时,现在放射性测量仪检测到样品衰变180次/每分钟,那么两天后（6个半衰期,衰减到六十四分之一）再检测这块样品就将是2.8 counts/min
英文水平有限,说个大意,不知是否准确
2.给气体放电管通电,气体发光,光线透过分光镜看到的光谱是线状光谱
3.···假如你能听到对方后卫的德布罗意波,那么当他从你身后加速向你冲来时,你应该听到“响度变大,同时频率也在升高”（多普勒）
4.一种碘的放射性同位素半衰期是8小时,现在放射性测量仪检测到样品衰变180次/每分钟,那么两天后（6个半衰期,衰减到六十四分之一）再检测这块样品就将是2.8 counts/min
英文水平有限,说个大意,不知是否准确