2022知到答案 University physics 最新完整智慧树知到满分章节测试答案
第一章 单元测试
1、 问题:How many years older will you be 1.00 gigaseeond from now? (Assume a 365-day year.) ( )
选项:
A:41.7 y
B:31.7y
C:51.7 y
D:21.7 y
答案: 【
31.7y
】
2、 问题:Scientific notation:
选项:
A:
B:
C:
D:
答案: 【
】
3、 问题:
选项:
A:−1/4
B:1/4
C:−1/3
D:1/3
答案: 【
−1/4
】
4、 问题:
Vector operation. If
选项:
A:-2/3
B:-5/3
C:-4/3
D:-8/3
答案: 【
-4/3
】
5、 问题:
Two displacement vectors,
选项:
A:9 m
B:7 m
C:5 m
D:1 m
答案: 【
9 m
】
第二章 单元测试
1、 问题:A particle is moving straight along the x direction, and its position is determined by the equation , where the unit of x is meter, and the unit of t is second. Then its velocity is expressed as ( )
选项:
A:v=20t
B:v=20t+8
C:v=10t
D:v=10t+8
答案: 【
v=20t
】
2、 问题:Velocity is a vector, and speed is also a vector. ( )
选项:
A:对
B:错
答案: 【
错
】
3、 问题:The magnitude of the acceleration of the object may be very large, while the magnitude of the velocity of an object can remain unchanged. ( )
选项:
A:对
B:错
答案: 【
对
】
4、 问题:
选项:
A:Ship A
B:Ship B
C:Both ships will be hit at the same time
D:More information is needed
答案: 【
Ship B
】
5、 问题:A car moves at constant speed in a horizontal of radius 20.0 m, making a complete circle in 7.0 s. What is the acceleration of the car? ( )
选项:
A:
B:
C:
D:
答案: 【
】
第三章 单元测试
1、 问题:Suppose an astronaut landed on a planet where g=19.6 m/s2. Compared to earth, would it be for her to catch a ball that is moving horizontally at 12 m/s? (Assume that the astronaut’s spacesuit is a lightweight model that doesn’t impede her movements in any way.) ( )
选项:
A:easier
B:harder
C:just as easy
D:More information is needed to determine
答案: 【
just as easy
】
本文章不含期末不含主观题!!
本文章不含期末不含主观题!!
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