Which of them may contain null values?

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1 Answer

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1.5276g of CdCl2 was found to contain 0.9367g of cadmium. Calculate the atomic weight of cadmium.

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A man bought two cows in Rs. 410 and sold each of them at the same price and thereby gained 15% on one and lost 10% on the other. What was the C.P. of each cow?

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A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to a halt after that. If the collision lasts for 1 s:

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A resistance of $50 \Omega$ is registered when two electrodes are suspended into a beaker containing a dilute solution of a strong electrolyte such that exactly half of the them are submerged into solution.

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Find the set of all real values of $x$ satisfying the inequality $\sec ^{-1} x>\tan ^{-1} x$.

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