Martin Cooper is considered the father of a mobile phone and was launched in 1973
Question 2. You need to drain a tank with 3 discharge valves at the bottom, 2 valves with a diameter of 10cm, 1 valve with a diameter of 20cm, how to discharge water faster in the following ways?
Discharge 2 valves with 10cm diameter
Discharge 1 valve with 20cm diameter
Discharge 1 valve with 20cm diameter. The area of the circle πR˄2, so the valve with the diameter of 20 cm twice as large as the other 2 valves combined, should discharge faster
Question 3. You said Copernicus was famous in any field
Painting
Math
astronomy
Physical
Question 4. Which temple is the symbol of eternal love?
Tal Manal
Ramanathaswamy
Mahabodhi
Question 5. There are 1000 contestants entering Chemistry, University of Science, enrollment target is 100. Has a successful candidate passed at least how many candidates?
900
800
700
Question 6. Which chemicals are commonly used as natural rubber latex antifreeze?
Ammonia
Potassium
Salt
Question 7. Which vitamins are soluble in grease?
Vitamin A
Vitamin B1
Vitamin C
Vitamin B12
Question 8. How many times is the number of rounds of a long watch's dial?
23
24
25
26
Question 9. In 1 calendar year, how many months have 30 days?
first
2
3
4
Question 10. What is the national title in Le Loi's reign?
Au Lac
Dai Viet
Dai Co Viet
Dai Nam
Question 11. What is the first work of musician Trinh Cong Son?
Please be as happy as ever
Yellow flowers a few degrees
Wet Mi
Peach pink lips
Question 12. What is the weather forecast on VTV often dividing our country into areas?
7
8
9
ten
Question 13. What happens when astronomy occurs between the Sun and Earth?