Lab Activity: Measurement of the Weight of a Given Body Using the Parallelogram Law of Vector Addition.

Which one of the following statements about the law of conservation of mass is correct?

Cotyledons are also called-

A student has not used a plane mirror while taking observations using Gravesand's apparatus and hence found error in his result. Which one of the following is the correct reason of using a plane mirror while taking observations?

In the Gravesand’s apparatus experiment, what is a potential source of error?

Which of the following precautions is not necessary when performing a physics experiment involving a board, pulleys, weights, and paper?

In the Gravesand’s apparatus experiment, three weights (P, Q, and S) are used to demonstrate the parallelogram law of vector addition. If the position of junction O moves closer to its initial position when weights P and Q are disturbed and left free, what does this indicate?

In a laboratory experiment, you are tasked with measuring the weight of a given body using the Parallelogram Law of Vector Addition. Two forces act on the body, one with a magnitude of $10 \mathrm{N}$ directed eastward and the other with a magnitude of $8 \mathrm{N}$ directed northward. What is the resultant force using the Parallelogram Law?

In a lab experiment using the Parallelogram Law of vector addition to measure the weight of a given body, what is the purpose of arranging the weights on the two pans of the balance in such a way that they are not in a straight line?