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Physics, Chemistry and Biology: Post your doubts here!

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Howzzit dunn?
The answer is D
A greater force is being exerted on the left side of the block. This will cause it to move to the right. Since the forces acting on the body are not equal, it cannot move with constant speed and that leaves us with constant acceleration

To create cathode rays in a vacuum, what might be a suitable p.d to connect bw the cathode and anode? It'll be a.c or d.c?
You can use both, but that does not create a vacuum. A vacuum is created by actually sucking all the air from the CRO
 
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The answer is D
A greater force is being exerted on the left side of the block. This will cause it to move to the right. Since the forces acting on the body are not equal, it cannot move with constant speed and that leaves us with constant acceleration


You can use both, but that does not create a vacuum. A vacuum is created by actually sucking all the air from the CRO
so what p.d shall i apply? 6Va.c /600V a.c /6000a.c/6Vd.c /600V d.c /6000d.c ??? It's an MCQ
 
Messages
227
Reaction score
568
Points
103
The answer is D
A greater force is being exerted on the left side of the block. This will cause it to move to the right. Since the forces acting on the body are not equal, it cannot move with constant speed and that leaves us with constant acceleration


You can use both, but that does not create a vacuum. A vacuum is created by actually sucking all the air from the CRO
so what p.d shall i apply? 6Va.c /600V a.c /6000a.c/6Vd.c /600V d.c /6000d.c ??? It's an MCQ
 
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Mai(M4!)
okay i will tell u the ans but not 100% sure

see, when humans consume green plants as there food they are acting as primary consumer while
when animals are fed on the crop plants then we consume the animals then we are secondary consumer
so it is more efficient to be at primary consumer level as we will have more energy gained due to less number of trophic levels and when animals consume the plants first they lose alot of energy in respiration, movement and excretion even fighting diseases so eating plants directly gives more energy so more efficient due to less energy loss by animals because as the trophic level increases the energy available decreases .

Hope this was the right answer :D (y)(y);)
Thanks that was helpful :D
 
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