北航《大学物理(上)》在线作业三(国外英文资料).docVIP

北航《大学物理(上)》在线作业三(国外英文资料) Beihang university physics (top) online assignment 3 The problem of choice is choice One, single topic (total 15 questions, 60 points). The radius of mercury is 0.04 times the radius of the earth and 0.04 times the mass of the earth. The acceleration of gravity on earth is g, and the gravitational acceleration on the surface of mercury is (). A. 0.1 g B. 0.25 g C. 4 g D. 2.5 g The choice: B 2. Two of the same container containing hydrogen, connect with a thin glass tube, tube with a drop of mercury for the pistons, as shown. When the temperature 0 ℃, container on the left and the right of the container temperature is 20 ℃, the mercury droplets just right in the middle of the tube. Try to ask, when the temperature of the left container from 0 ℃ to 5 ℃, while the container at the temperature from 20 ℃ to 30 ℃, the mercury droplets () A. mercury drops to the left A little bit B. mercury droplets move slightly to the right C. mercury drops are not sure D. mercury drops do not move The choice: A -- -- -- -- -- -- -- -- -- -- -- -- - See pictures A. B. C. D. The choice: A -- -- -- -- -- -- -- -- -- -- -- -- - A spring oscillator is a simple harmonic oscillation, period T, and the following statement is correct (). A. If t is equal to the magnitude of the displacement at the time of t plus t plus delta t, then delta t is going to be equal to the integer times t B. If t is equal to the kinetic energy of t plus delta t, then delta t minus is equal to the integer times t over 2 If delta t equals t, then the kinetic energy of t times and t plus delta t must be equal D. Delta t = t / 2, the moment of t is equal to the length of the spring -- -- -- -- - choice: C 5. This is light spring YiJin degree coefficient is k, upright, lower end suspension of a quality as m balls, at the beginning of the spring for the original long ball in contact with the ground, this lift spring top slowly, until the ball just up off the ground, the work force in the process i