Which of the following statements is incorrect ?
(A) Rotten garbage can be used as manure for plants
(B) Materials made up of glass take thousand of years to decompose
(C) We should put garbage in plastic bags and throw it away
(D) Burning of plastic leads to cancer.
They have asked which action is incorrect.
Megha used the five items shown in the picture to learn more about magnets.
Which one of the following is not a possible observation for Megha when all 4 rings are placed one on top of the other through the wooden stand?
The answer can be C option.
Study the distance time graph of a toy car given here and choose the incorrect statement from the following.
(A) The toy car is fastest during first 10 seconds
(B) The toy car is slowest in between 10 and 20 seconds
(C) Distance travelled during last 10 seconds is 5 m
(D) None of these.
The answer should be A but they are telling the answer is C.Please someone answer to my question.
Ans 1: (Master Answer)
Alpha particles leaves the nucleus of an unstable atom at a speed of 16,000 kilometres per second, around a tenth the speed of light.
Beta particles travel at a speed of 270,000 kilometres per second, around 98% of speed of light.
Gamma particles travel at the speed of light.
X changes to Y when it is cooled down.
Select the correct option about the arrangement of molecules in X and Y.
Achin conducted an experiment to find out the amount of light that can pass through three different materials, a clear plastic sheet, a cardboard and a piece of tracing paper. All the materials have the same thickness. He shone a torch on the three materials and used a light sensor to measure how much light has passed through each of them. Which of the following graphs most likely shows the amount of light that has passed through each material?