Which of the following defines the pH?
Anonymous Quiz
17%
It is the positive logarithm of hydronium ion concentration.
63%
It is the negative logarithm of hydronium ion concentration.
13%
It is the positive logarithm of hydroxide ion concentration.
7%
It is the negative logarithm of hydroxide ion concentration.
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When a biologist shares her research findings with other fellow biologists, she is
Anonymous Quiz
22%
analyzing her data.
19%
drawing her conclusion.
42%
reporting her result.
17%
making her hypothesis.
Which one is wrong statement about projectile motion?
Anonymous Quiz
28%
A. Horizontal and vertical component independent each other
16%
B. Acceleration is zero in horizontal motion.
19%
C. Horizontal Velocity is remain constant.
36%
D. Acceleration is changed in vertical motion
Suppose the gravitational force between two spheres is 30N. If the magnitude of each mass doubles. What is the force between the masses?
Anonymous Quiz
36%
A. 60N
22%
B. 15N
40%
C. 120N
3%
D. 10N
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🔰Physics Question
What's the kinetic energy of rotating body if moment of inertia 100kgm^2 and angular velocity 2rad/s?
What's the kinetic energy of rotating body if moment of inertia 100kgm^2 and angular velocity 2rad/s?
Anonymous Quiz
6%
A. 20J
15%
B. 30J
73%
C. 200J
6%
D. 800J
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Which of the following defines the pressure?
Anonymous Quiz
75%
It is the force acting per unit area.
15%
It is the difference between force and area.
4%
It is the sum of force with area.
5%
It is the product of force and area.
A 500N force is applied on the object that has 2m² area, what is the pressure that is exerted on the object?
Anonymous Quiz
5%
502 Pa
9%
498 Pa
74%
250 Pa
13%
1000 Pa
The pressure applied to an enclosed fluid is transmitted to every part of the fluid, as well as to the walls of the container without reducing in value. This phenomenon is referred to as:
Anonymous Quiz
15%
Archimedes' Principal
71%
Pascal's Principal
11%
Bernoulli's Principal
3%
Torricelli's Law
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Which of the following best describes the relationship between absolute pressure, atmospheric pressure and gauge pressure?
Anonymous Quiz
13%
Absolute pressure is the difference between gauge and atmospheric pressure.
58%
Gauge pressure is the difference between absolute pressure and atmospheric pressure.
18%
Atmospheric pressure is the sum of gauge and absolute pressure.
11%
Gauge pressure is the sum of absolute pressure and atmospheric pressure.
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Which of the following is NOT properties of bases?
Anonymous Quiz
12%
Soluble bases change the colour of indicators.
17%
Bases have a bitter taste.
14%
Aqueous solutions of bases conduct electricity.
58%
Bases have sour taste.
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Which one of the following bases is used to remove soil acidity?
Anonymous Quiz
18%
Sodium hydroxide
27%
Potassium hydroxide
26%
Calcium hydroxide
29%
Ammonia
How many moles of NaOH are contained in 65mL of a 2.2M solution of NaOH in water?
Anonymous Quiz
23%
0.143 moles
41%
29.54 moles
28%
33.84 moles
8%
0.034 moles
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Which of the following salts is used to make Bordeaux mixture (mixture of CuSO4 and Ca(OH)2) and other fungicide?
Anonymous Quiz
24%
CuSO4
37%
Ca(OH)2
29%
CaSO4
11%
BaSO4
Salts that absorb water from the atmosphere but remain solid are known as ___.
Anonymous Quiz
22%
Deliquescent salts
20%
Efflorescent salts
52%
Hygroscopic salts
7%
Soluble salts
Sodium hydroxide is added to solution M. A reddish-brown precipitate is formed, solution M contains:
Anonymous Quiz
21%
Iron(II) ions
43%
Iron (III) ions
27%
Copper (II) ions
8%
Silver (I) ions
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