Energy losses mainly occur due to:

Patricia is studying the kinetic energy formula. She knows that kinetic energy is given by KE = ½ mv². If the mass of an object is doubled, what happens to its kinetic energy if the speed remains constant?

Which law states that energy cannot be created or destroyed?

Tina is studying power. She knows that power is the rate of doing work. If a machine does 1000 J of work in 2 seconds, what is its power?

Victor is studying energy resources. He knows that renewable resources can be replenished naturally. Which of the following is a renewable resource?

Which formula represents work done?

Victor is studying energy resources. He knows that fossil fuels are non-renewable. Which of the following is a renewable energy resource?

Oliver is studying the conservation of energy. He knows that energy is conserved in a closed system. In a roller coaster, where is the potential energy maximum?

Ming is studying efficiency. He knows that efficiency is a measure of how well a machine converts input energy to useful output. If a machine has an efficiency of 40%, what percentage of input energy is wasted?

George is studying energy conversion. He drops a ball from a height of 5 meters. As the ball falls, its potential energy is converted to kinetic energy. What is the kinetic energy of the ball just before it hits the ground? (Assume mass = 1 kg, g = 10 m/s²)

Ahmed is studying potential energy. He knows that potential energy depends on height. If a 2 kg object is raised to a height of 10 meters, what is its potential energy? (Take g = 10 m/s²)

Emma is studying nuclear energy. She knows that nuclear energy is released during nuclear fission or fusion. What is the fuel used in most nuclear power plants?

Lara is studying power. She knows that power is the rate of doing work. A motor does 500 J of work in 10 seconds. What is the power of the motor?

Waseem is studying the work-energy theorem. He knows that the work done on an object is equal to the change in its kinetic energy. If a force does 500 J of work on an object, what is the change in kinetic energy?

Lara is studying hydroelectric resources. She knows that hydroelectric power uses the energy of flowing water. What is the main source of energy for hydroelectric power?

Patricia is studying waves in the sea. She knows that wave energy can be harnessed to generate electricity. What type of energy is wave energy?

Hina is studying geothermal energy. She knows that geothermal energy is derived from the Earth's internal heat. Which of the following is a source of geothermal energy?

Energy possessed by a moving object is called:

If more work is done in less time, power will be:

Sam is studying efficiency. She knows that efficiency is the ratio of useful output energy to input energy. A machine has an input of 500 J and an output of 300 J. What is the efficiency of the machine?

Uma is studying efficiency. She knows that efficiency is expressed as a percentage. If a machine has an efficiency of 80%, what does this mean?

Which object has maximum kinetic energy?

Khalid is studying tidal energy. He knows that tidal energy is generated by the rise and fall of tides. What causes tides?

Quinn is studying potential energy. He knows that potential energy is given by PE = mgh. If the height of an object is doubled, what happens to its potential energy?

Rachel is studying power. She knows that power is the rate at which work is done. A machine does 1000 J of work in 5 seconds. What is the power of the machine?

When a body falls freely, its potential energy is converted into:

Hina is studying the conservation of energy. She knows that energy can neither be created nor destroyed, but it can be converted from one form to another. When a pendulum swings, what happens to its energy at the highest point?

If force is applied but no displacement occurs, the work done is:

Chloe is studying the conversion of energy in a hydroelectric dam. The potential energy of water is converted to kinetic energy, which then turns turbines. What is the final form of energy?

Xia is studying the law of conservation of energy. She knows that energy can be converted from one form to another. In a hydroelectric dam, what energy conversion takes place?