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What are some questions about energy?

Energy Questions

• Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat?
• Can you go fast enough to get enough mass to become a black hole?
• How can a material at a certain temperature have all of its molecules at the same energy?
• How can we travel to the past?
• How do free energy machines work?

What is the physics concept of energy?

Energy is defined as the “ability to do work, which is the ability to exert a force causing displacement of an object.” Despite this confusing definition, its meaning is very simple: energy is just the force that causes things to move. Energy is divided into two types: potential and kinetic.

What type of energy represents the sum of the KE and PE that a moving object has *?

mechanical energy
As already mentioned, the mechanical energy of an object can be the result of its motion (i.e., kinetic energy) and/or the result of its stored energy of position (i.e., potential energy). The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy.

Which of the following statements are true about mechanical energy?

Which of the following statements are true about mechanical energy? The total amount of mechanical energy of an object is the sum of its potential energy and the kinetic energy. Heat is a form of mechanical energy. The mechanical energy of an object is always conserved.

What is energy formula?

For the potential energy the formula is. P.E. = mgh. Unit. The SI unit of energy is joules (J), which is named in honour of James Prescott Joule.

Different types of generators are used to create energy. Electrical energy is caused by moving electric charges called electrons. In power stations, turbines are turned using energy from sources such as heat, wind and moving water. Generators are machines for converting motion energy into electricity.

What 3 things can happen to energy in physics?

Energy moves and changes form. Three more ways energy can be transferred are through light, sound, and heat.

What is energy in physics example?

Examples presented include a lightbulb, a car’s engine, and plant photosynthesis. energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms.

What are the six main forms of energy?

Energy comes in six basic forms: chemical, electrical, radiant, mechanical, thermal and nuclear. In other research, you may find additional forms mentioned such as electrochemical, sound, electromagnetic and others. However, many additional forms are combinations of these six basic categories.

What factors s affect kinetic energy?

What Factors Affect Kinetic Energy? The two main factors that affect kinetic energy are mass and speed. Why? Because the motion of an object depends on how fast it’s traveling, but also how much mass it has, though velocity is the more important factor.

What is the basic unit of energy?

joule
The basic unit of energy. A joule is defined as the amount of energy expended by a force of one newton moving an object one meter in the same direction as the force. Kilowatts-hours measure the total amount of electricity used over time.

What is the kinetic energy formula?

In classical mechanics, kinetic energy (KE) is equal to half of an object’s mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.