Mathematics A
Find the value of sin 1110?
0.5
What is the only even prime number?
2
Which scientist proposed the theory of relativity？
Albert Einstein
Which element of noble gases do not obey the octet rule?
Helium
What is the largest organ of the human body？
Skin 皮肤
How to calculate the sum of arithmetic seqence?
Assume there are n terms in arithmetic sequence, Sn=(a_1+a_n)*n/2
If the side length of a square is doubled, how many times larger is its area?
4 times
You are inside a smoothly moving train with no windows. If you drop a ball, does it fall straight down or backward?
Straight down
What is the product of complete combustion of diamond?
Carbon dioxide
What is jelly-like substance filling the interior of the cell and holds the organelles？
Cytoplasm 细胞质
Describe and explain the definition of limits
A limit describes the value the function approaches as the input nears a point, regardless of the function’s actual value at x=a.
For very large n, which grows faster: n^2 or 2^n?
2^n
A light-year measures distance or time?
Distance
Which elements has the highest value of electronegativity?
Fluorine
What is the process that creates two identical daughter cells from one parent cell？
Mitosis 有丝分裂
Describe the phase shift of sin (2x+pi/2)
-pi/4
Which is larger, 0.999... or 1?
0.999... = 1
Which planet is closest to the Sun?
Mercury
Which element has the longest name in Period 2?
Beryllium
This enzyme unwinds the DNA double helix during replication.
Helicase DNA解旋酶
How to define the motion function of a Ferris wheel with trigonometric functions
1. Set up the parameters.
2. Build up the coordinate systems
3. List a function
What is the last digit of 7^2026
9
because it has a period of 4. （7, 9, 3, 1）
If you see lightning and hear thunder 3 seconds later, approximately how far away is the lightning?
About 1 km. 3s * 340 m/s = 1020 m
What is the lightest metal?
Lithium
This marine animal has three hearts, “nine brains”, and blue blood, but despite all that brainpower, it has no sense of hearing.
Octopus 章鱼