College Physics答案2023

第二章测试

1.A bottle of water is 500 ml, in standard units, which is（ ）
A:0.05 B:0.005 C:0.5 D:0.0005
答案:D
2.A vector with a magnitude 10 and angle to +y axis, which can be written down as（ ）。
A: B: C: D: 3.Which of the following physics quantities can be directly measured.（ ）
A:speed B:length C:time D:weight 4.Which of the following equations about vector operations are correct.（ ）
A: B: C: D: 5.If two vectors are perpendicular, their dot product is zero and their cross product has the maximum magnitude. （ ）
A:对 B:错