Hanging ball increase

The average weight of 47 balls is 4 gm. If the weight of the bag (in which the balls are kept) be included, the calculated average weight per ball increases by 0.3 gm. What is the weight of the bag?

An iron ball of mass M is hanged from the ceilling by a spring with a spring constant k. It executes a SHM with a period P. If the mass of the ball is increased by four times, the new period will be

calculate the change in electrostatic force between the two balls, if charge on both the balls are increased by 10%.

There is a step of height h on an incline plane. The step prevents a ball of radius R from rolling down. (a) If the inclination (theta) of the incline is increased gradually, at what value of theta the ball will just manage to climb the step? (b) Does the gravitational potential energy of the ball increases or decreases as it climbs the step ?

Two identical metallic balls with equal charges are kept 4.5 cm apart. The force between both the balls increases by 10% on giving extra charge of 0.001 muC to one of the ball. Calculate the charge on each ball.

A disease which is due to hyperthyroidism, characterised .by enlargement of thyroid gland, protrusion of eye ball, increased BMR and weight loss is called

Protrusion of eye balls, increased basal metabolic rate and weight loss are the symptoms of which of the following disease?