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请按照下面的顺序学习并完成内容的打卡 Please study and complete the check-in content in the following order.
Finish the following content
完成下面的内容
The significant figure of 33.00 is .
The significant figure of 0.2000 is .
The significant figure of 34.040 is .
The significant figure of 350000000 is .
The significant figure of 3405 is .
The significant figure of 0.0045 is.
The significant figure of 0.740 is .
The significant figure of 2220. is .
（123.4+456.90）*0.560=
Answer:
For a sphere with radius of 34.50cm and density of 1.03g/mL. Please calculate the total mass. （with the right significant figure)
对于一个球体，半径34.50cm，密度1.03g/ml 请计算它的质量 (结果的有效数字需要正确）
Answer:
Please finish the following question
According to the rules of significant figures:
234 + 5600 =
660 - 34 =
0.4560 + 0.32 =
0.0092 - 0.02 =
23 × 23 =
0.230 × 0.023 =
985.0 ÷ 32.2 =
The data obtained from the student experiment is shown below, with some missing data. Please fill in the missing data according to the rules of significant figure propagation.
学生实验测试得到的数据如下，部分数据丢失，请按照有效数字传递的法则把缺失的数据填写回来
How is 9.8 × 10⁻² written in standard form?
How is 4,500,000 expressed in scientific notation?
A beam of light in media travels 2×10⁷mm in 5× 10⁵ns in a media ,please calculate the speed.
一束在介质中的光在 5× 10⁵ns 内传播了2×10⁷mm，请计算它在介质中速度
50mm is bigger than 5×10⁸nm
Please convert the following unit into SI base unit
请把下面的单位转化成SI Base unit
Unit of velocity can be km/h, if convert to SI base unit it is
(速度的单位可以是 km/h，换算为国际单位制基本单位是) /;
Unit of acceleration is(加速度的单位是) /²;
Due to Newton's second law(根据牛顿第二定律), 1 kg·m/² =1 N;
Due to work done, Unit of energy(根据功的定义，能量的单位) 1 J = 1 N· = 1 kg·²/²；
Unit of power is watt, if convert to SI base unit it is(功率的单位是瓦特 W，换算为国际单位制基本单位是) kg·²/³. Fill in the following blank
Vectors are quantities that has magnitude and .
Scalars are quantities that has only.
Speed is a quantity.
Velocity is a quantity.
Time is a quantity.
Power is a quantity.
Distance is a quantity.
Displacement is a quantity.
Unit 打卡
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