# What is the mass of electron moving with a speed of 0.8 C?

Table of Contents

## What is the mass of electron moving with a speed of 0.8 C?

The correct option is (c) 5mo/3.

**How do you find the mass of a moving object?**

Divide the force acting on the body by this acceleration. If, for instance, a force of 12,000 Newtons acts on it: 12,000 ÷ 6 = 2,000. This is the object’s mass, measured in kilograms.

### Does mass change with speed?

The mass of an object does not change with speed; it changes only if we cut off or add a piece to the object. Force = mass × acceleration (Newton’s Second Law); this is, to accelerate something, you need only apply a net force to it.

**Does E mc2 apply to moving objects?**

Special Relativity and E=mc2 Because of the equivalence of energy and mass, the energy which an object has due to its motion will add to its mass. This effect is only significant to objects moving at speeds close to the speed of light.

## At what speed the mass of an object will be double of its value at rest?

7. At what speed the mass of an object would be double its value at rest? V = √3 c/2.

**Why is photon zero rest mass?**

From the particle nature of light, we consider light to travel in the form of small packets of energy or quanta of energy. These small packets are called photons. The photons are said to be chargeless and massless particles that travel at the speed of light. So the rest mass of a photon is taken to be zero.

### How do you calculate the momentum of a moving body?

A student calculates the momentum of a body moving at a relativistic speed by multiplying the rest mass by the velocity. This gives a result for the momentum that is too small. The most important conclusion to be drawn from the Michelson-Morley experiment is that light does not travel through a luminiferous ether.

**What is the momentum of a spaceship moving toward the Earth?**

A spaceship, moving toward the Earth at a speed of 0.9c, shines a green laser at Earth. An observer on Earth would see the light arriving at a speed of c but at a shorter wavelength. A student calculates the momentum of a body moving at a relativistic speed by multiplying the rest mass by the velocity. This gives a result for the momentum that is

## What would happen if the speed of light was 35 mi/h?

Describe some of the everyday consequences that would follow if the speed of light were 35 mi/h. A person in motion would age slowly than a person who stays at home due to time dilation. The length of a car in motion seems to be shorter due to length contraction.

**How fast is the ship traveling relative to the Earth?**

As a spaceship flies past with speed v, you observe that 1.0000 s elapses on the ship’s clock in the same time that 1.0000 min elapses on Earth. How fast is the ship traveling, relative to the Earth? (Express your answer as a fraction of the speed of light.) Donovan Bailey set a world record for the 100-m dash on July 27, 1996.