结果1 题目 A particle moving along the x‑axis has an acceleration, measured in ft/sec, given by a(t) = 1/(√(t+1)). What is the average acceleration of this particle from time t = 0 to t = 3? A: B: 2 C: D: 相关知识点: 试题来源: 解析 ANone 反馈 收藏 ...
-rays from Merging Galaxy Cluster Strong shock due minor merger of galaxy clusters. Model parameters are tuned to be consistent with existing measurements. Particle acceleration up to 1019 eV. (Origin of UHE-CR?) Secondary e+e- following proton interaction with CMB photon are dominant origin ...
Examples of the acceleration of energetic ions and electrons are given for the Sun, the middle heliosphere, and the outer heliosphere. The characteristics of the acceleration are revealed only after the effects of energetic particle pr...
In a two dimensional motion,instantaneous speed v0 is a positive constant.Then which of the following are necessarily true? A The acceleration of the particle is zero. B The acceleration of the particle is bounded C The acceleration of the particle is necessarily in the plane of motion. D ...
Besides solar flares and CMEs, which are transient events, acceleration of particles has also been observed in other places in the solar system, including the solar wind termination shock, planetary bow shocks, and shocks bounding the Corotation Interaction Regions (CIRs). Understanding how ...
It will be shown that their acceleration is strongly favored at the reverse shock over the forward shock. The physics of the injection problem (the difficulty in accelerating near thermal-energy particles) will also be discussed. It will be shown that long-wavelength magnetic fluctuations enhances ...
We examine Fermi-type acceleration at relativistic shocks, and distinguish between the initial boost of the first shock crossing cycle, where the energy gain per particle can be very large, and the Fermi process proper with repeated shock crossings, in which the typical energy gain is of order ...
【题目】 1) A particle initially located at the o rigin has an acceleration o f = 2.00 m/s2 and an initial velocity o f 0 = 7.00 m/s.(a)Find the vector position at any time t (wh ere t is measured in seconds).(t+t2)m Find the vector velocity at any time t.( + t ) m...
High-energy particle acceleration in the shell of a supernova remnant Aye, A.R. Bazer-Bachi et al., High-energy particle acceleration in the shell of a supernova remnant. Nature 432 , 75–77 (2004). arXiv:astro-... F Aharonian,A Akhperjanian,K Aye,... - 《Nature》 被引量: 774...
(2) are forces due to the gravity acceleration; effective Coulomb friction which includes lubrication due to the buoyancy\(\left(1-{\gamma }^{m}\right)\), liquefaction due to the solid volume fraction\(\left({\alpha }^{m}\right)\), and the factor\(\frac{u}{| u| }\)indicates ...