You have two springs. one has a greater spring constant than theother. you also have two objects, one with a greater mass than theother. which object should be attached to which spring, so that theresulting spring-object system has the greatest possible period ofoscillation?

the object with the smaller mass should be attached to the springwith the greater spring constant.

the object with the smaller mass should be attached to the springwith the smaller spring constant.

the object with the greater mass should be attached to the springwith the greater spring constant.

the object with the greater mass should be attached to the springwith the smaller spring constant.

The object with the greater mass should be attached to the spring with the smaller spring constant, so that the resulting spring-object system has the greatest possible period of oscillation.

Option D

Explanation:

According to the simple harmonic motions, from physics, it gives a relation between deformation force and the deflection. The more deflection results in more time period of oscillation.  

                                            F = - k x

where ‘k’ is the spring constant, and ‘F’ is the deformation force.

So, deflection is directly proportionate to forces, and inversely proportionate to its spring constant. Hence, we can derive that the force must be maximum, and hence weight must be maximum, with the spring constant lesser. Then, the deflection will be high. So, time period increases.

a and c

c is 100% but i am confused in a

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =