Measurement of Matter — Science STD 9 — Question

Write the formula : Potential energy

To which places do people choose to go on vacation in order to relax when they are tired of crowds and stressful life?

A rocket of mass 100 tonnes is propelled with a vertical velocity 1 km/s. Calculate kinetic energy.

Find whether work is positive, negative or zero: Person pushing a car in the forward direction.

A force of 50 N acts on an object and displaces it by 2 m. If the force acts at an angle of 60° to the direction of its displacement, find the work done.

Which device converts electrical energy into heat?

Give two examples of : If a TV of rating 100W is operated for 6 hrs per day, find the amount of energy consumed in any leap year?

Define : Excretion

Tissue joining muscles and bones.(write the tissue name)

How do interactions take place between biotic and abiotic factors of an ecosystem?