1.单选题- (共3题)

A.每颗星做圆周运动的线速度为![]() |
B.每颗星做圆周运动的角速度为![]() |
C.每颗星做圆周运动的周期为![]() |
D.每颗星做圆周运动的加速度与三星的质量无关 |

A.+Q | B.+2Q | C.+3Q | D.+4Q |

A.![]() | B.![]() | C.![]() | D.![]() |
2.选择题- (共1题)
根据材料内容,选择正确答案。
One of my favourite things to do is hiking in mountains. Because nobody likes the idea of getting lost, I always prepare before every trip. But what's the best navigation tool, a Global Positioning System (GPS) or a good old map and compass? Five of my friends and I hiked through the mountains on a trail I marked. One team of three carried a GPS, and the other team used a map and compass.
It took the GPS team 3 hours and 11 minutes to get through the whole hike, however, it took the map and compass team only 2 hours and 49 minutes. The biggest problem the GPS team met was that they lost the satellite signal (卫星信号) in some places. With no map or compass, they had to walk around until they were in a place where the signal was good. The map and compass team was able to spot(认出) different landmarks, compare them to their maps and then use the compass to point them in the right direction.
When I head out on my future hikes, I'm bringing a map, a compass and a GPS to show me the way.
3.多选题- (共3题)

A.v0 | B.0 | C.![]() | D.-v0 |

A. A点的场强大小为

B. B点的场强大小为

C. D点的场强大小不可能为0
D. A、C两点的场强相同

A.导体棒cd受水平恒力作用时流经它的电流![]() |
B.导体棒ab匀加速下滑时的加速度大小![]() |
C.导体棒cd在水平恒力撤去后的位移为![]() |
D.导体棒cd在水平恒力撤去后产生的焦耳热为![]() |
4.填空题- (共2题)

A.微粒运动就是物质分子的无规则热运动,即布朗运动 |
B.当两个相邻的分子间距离为r0时,它们间相互作用的引力和斥力大小相等 |
C.食盐晶体的物理性质沿各个方向都是一样的 |
D.小草上的露珠呈球形的主要原因是液体表面张力的作用 |
A.一束白光通过三棱镜后形成了彩色光带是光的色散现象 |
B.光导纤维丝内芯材料的折射率比外套材料的折射率大 |
C.海面上的海市蜃楼将呈现倒立的像,位置在实物的上方,又称上现蜃景 |
D.一束色光从空气进入水中,波长将变短,色光的颜色也将发生变化 |
E.一束白光从空气斜射进入水中,也将发生色散 |
5.解答题- (共3题)

(1)子弹射出沙袋瞬间的速度v1的大小;
(2)子弹射入沙袋前的速度v的大小。

(1)若波速为35 m/s,求质点M在t1时刻的振动方向.
(2)在t1到t2的时间内,如果M通过的路程为1m,那么波的传播方向怎样?波速为多大?


(1)求棒由静止刚释放瞬间下滑的加速度大小a;
(2)假若棒由静止释放并向下加速运动一段距离后,灯L的发光亮度稳定,求此时灯L的实际功率P和棒的速率v。
6.实验题- (共1题)

(1)本实验必须测量的物理量有________。
A.斜槽轨道末端到水平地面的高度H |
B.小球a、b的质量ma、mb |
C.小球a、b的半径r |
D.小球a、b离开斜槽轨道末端后平抛飞行的时间t |



F.a球的固定释放点到斜槽轨道末端水平部分间的高度差h
(2)放上被碰小球b,两球(ma>mb)相碰后,小球a、b的落地点依次是图中水平面上的________点和________点。
(3)某同学在做实验时,测量了过程中的各个物理量,利用上述数据验证碰撞中的动量守恒,那么判断的依据是看________和________在误差允许范围内是否相等。
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【1】题量占比
单选题:(3道)
选择题:(1道)
多选题:(3道)
填空题:(2道)
解答题:(3道)
实验题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:3
5星难题:0
6星难题:7
7星难题:0
8星难题:0
9星难题:2