derive relationship between commercial unit of energy and si unit of energy

is ncert solutions for computer science avalable

calculate the work required to be done to stop a car of 1500kg moving at a velocity of 60km/h?

Define 1 watt of power:

what is the relation between KW h and joules

What is the formula of sulphide ion,sulphate ion,sulphur ion ?

Q- Give one example of:-

1. positive work done
2. negative work done
3. zero work done

(a) Certain force acting on a 20kg mass changes its velocity from 5m /s to 2 m/s . calculate the work done by the force .

(b) State two possible condition under which the work done would be zero.

(c) if the kinetic energy of the body is increased by 300% then determine the percentage increase in the momentum.

the power of motor pump is 2kW. how much water per minute the pump can raise to a height of 10m? (given g = 10m/s)

 suggest me a working science model for class 9th

The kinetic energy of an object of mass , m moving with a velocity of 5m/s is 25J.what will be its kinetic energy when its velocity is doubled ?what will be its kinetic energy when its velocity is incrased three times

a body of mass 2 kg is thrown vertically upwards with the initial velocity of 20 m s^-1. what will be its potential energy at the end of 2 seconds.(g=10m s^-2)

What is the derivation of Kinetic energy and Potential energy

What is the work done to increase the velocity of a car from 30km/h to 60km/h if the mass of the car is 1500kg?

the k_E acquired by a mass m in travelling a certain distance s ,starting from rest ,under the action of a constant force is directly proportional to:

a)m

b)/m

c)1//m

d)none of these