Shubham Jha - Class 9
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When water at 0°C freezes to form ice at the same temperature of 0°C, then it:
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26%
Absorb some heat
45%
Release some heat
23%
Neutral
6%
None
Which of the following phenomena always results in the cooling effect?
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42%
Condensation
44%
Evaporation
12%
Filteration
2%
None
Smallest cell in the world
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35%
Mycoplasma
31%
Chitin
24%
Neuron
9%
None
Longest cell in the world
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17%
Mycoplasma
43%
Ostrich egg
35%
Neuron
5%
Schliedn
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A stone is released from the top of a tower of height 19.6 m. Then its final velocity just before touching the ground will be:
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50%
19.6 m/s
26%
19.8m/s
18%
20.3m/s
6%
21.9m/s
Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be:
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26%
1/2times
45%
2 times
25%
4 times
4%
2/4 times
A ball weighing 4 kg of density 4000 kgm-3 is completely immersed in water of density103 kgm-3. What will be the buoyant force acting on it?
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19%
O N
32%
10N
32%
100N
16%
1000N
Si unit of luminous density
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21%
Mol
50%
Candela
22%
Giga
8%
Zexo
Value of -sin45 degree
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22%
1/2
65%
-1/✓2
11%
1
2%
2