Chemistry
Grade-10
Easy
Question
Which of the following ores has magnetic properties?
- Galena
- Zinc blende
- Hematite
- Zincite
Hint:
Hematite has magnetic property.
The correct answer is: Hematite
True hematite, though iron containing, actually has a weak magnetic field because of the way its iron atoms are aligned. On the other hand, the mineral magnetite is highly magnetic, and many often erroneously assume it is magnetic hematite.
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There are two cars, car A and car B. Mass of car A is 3000 kg, travelling at 30 m/s collide with car B of mass 2000 kg travelling at 10 m/s in same direction. After collision, the velocity of car A becomes 60 m/s. Calculate the velocity of car B after the collision?
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There are two cars, car A and car B. Mass of car A is 3000 kg, travelling at 40 m/s collide with car B of mass 4000 kg travelling at 20 m/s in same direction. After collision, the velocity of car A becomes 50 m/s. Calculate the velocity of car B after the collision?
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A 3,000 kg truck moving at +15 m/s hits a bus 1,000 kg moving at +10 m/s in the same direction. What is the approximate velocity of the truck if the final velocity of the bus becomes 8 m/s.
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Mass of the blue ball is 0.88 Kg and mass of the pink ball is 1.50 kg
The following example follows law of conservation of momentum.
Is the statement true or false?
Initial:
Final:
Mass of the blue ball is 0.88 Kg and mass of the pink ball is 1.50 kg
The following example follows law of conservation of momentum.
Is the statement true or false?
Initial:
Final:
PhysicsGrade-10
