# Question: Can Energy Negative?

## Is dark energy negative energy?

Dark Energy is a hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity.

It has been hypothesised to account for the observational properties of distant type Ia supernovae, which show the universe going through an accelerated period of expansion..

## Can negative mass travel faster than light?

This may seem even more bizarre than negative mass, but such things are actually allowed by Einstein’s theory of relativity. Particles with negative mass squared are called tachyons, and they always travel faster than light.

## Can energy ever be negative?

Common mistakes and misconceptions. Kinetic energy can’t be negative, although the change in kinetic energy Δ K \Delta K ΔK can be negative. Because mass can’t be negative and the square of speed gives a non-negative number, kinetic energy can’t be negative.

## Can power be negative physics?

Power is a signed quantity; negative power just represents power flowing in the opposite direction from positive power.

## Can gravitational potential energy ever be negative?

The gravitational potential energy could even be negative if the object were to pass below the zero point.

## Does antimatter have negative energy?

Antimatter does not have negative mass. In our universe, there is no such thing as negative mass. Mass only comes in positive form. In contrast, electric charge can be positive or negative.

## What is negative work done with example?

Negative work follows when the force has a component opposite or against the displacement. Negative work removes or dissipates energy from the system. Two examples: In pulling a box of books along a rough floor at constant velocity, I do positive work on the box, that is I put energy into the system.

## Why is the power factor negative?

A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source. … In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred.

## Can you have negative resistance?

Unlike most positive resistances, negative resistance varies depending on the voltage or current applied to the device, and negative resistance devices can only have negative resistance over a limited portion of their voltage or current range.

## Can anything mass negative?

Hypothetically, matter can have negative mass in the same sense that an electric charge can be either negative or positive.

## What is negative potential energy?

Negative potential energy means that the work done becomes smaller as we approach the main object’s field, because the field’s force is actually doing all the positive work instead of the external force.

## Does Bose Einstein condensate have negative mass?

of Washington State University report their recent experimental work with a Bose-Einstein Condensate (BEC). They observed that this small, incredibly cold cloud of rubidium (Rb) atoms exhibited a “negative effective mass” while expanding.