Physics

What is the electric potential

What is the electric potential at a point 0.45 m away from a point charge of 4.0m C? Used this formula but didnt get the correct answer, please help and please show work. V = q/(4*pi*epsilon*r)-V=k

Do you have to use a barium borate crystal in order to entangle photons

im just curious and i just want to know, do you need a barium borate crystal to entangle photons? are there any alternatives? can you use sodium chloride crystals as a possible option? what makes a ba

Why do people like to investigate the Mpemba effect

please help-It seems to contradict the laws of thermodynamics when a hotter liquid can cool from its higher temperature to 0 degrees than a similiar liquid at a lower temperature to the same 0 degrees

Physics- Jet airliner vector help

A jet airliner moving initially at 290 mi/h due east enters a region where the wind is blowing at 100 mi/h in a direction 30.5° north of east. (Let the x-direction be eastward and the y-direction be n

What has more mass? homework help

a child a science textbook a slice of bread or a snail?-a child....!! .. you think of mass as the number of moleculesthat make the object...... .

Why is Isaac Newton's theory on gravity tought instead of Albert Einstien's

Newtons theory of gravity usually given in basic physics regarding slow moving particles. Alberts theory usually applied for.. it can be applied for general, hence general relativity.-a) its a lot eas

Physics Problem not too bad

A car is driven east for a distance of 49 km, then north for 30 km, and then in a direction 35° east of north for 26 km. Determine (a) the magnitude (in km) of the cars total displacement from its sta

What is a magnetic river

Apparently a combined system of levitation, propulsion and guidance using magnets.A video of the creator and river http://www2.imperial.ac.uk/imedia/content/view/433/professor-eric-laithwaite-demonstr

Can an object be blasted into space by bouncing off a magnetic field

yes... but the energy requirements to do this do not exist today .... How ever , they are looking at making guns and cannons that launch projectiles by generating a magnetic field...!! so it is possi

What happens to time when heat is added

Heat is energy causing particles to jiggle very fast. Assuming that rule stays constant no matter the amount of heat under planck temperature, does that mean that particles will eventually jiggle near

What is the famous experiment of Dr.Lijun Wang involving cesium gas

The work of Dr. Lijun Wang at the NEC research institute in Princeton seems to have given us a glimpse of multi-dimensional reality.When Wang recently transmitted a pulse of light towards a chamber fi

Is it possible to perceive more than 3 dimensions

Is it possible for anyone, even in other universes, to perceive more than 3 dimensions?-Not for us: were wired to perceive only three (well, unless you count time as a dimension, which I dont). Were n

How do you solve a two dimensional physics probelm

I have two problems for my physics class that I just cant figure out. If anyone can explain step by step how to solve these please help me. A seagull flies at a speed of 10m/s directly into the wind

What is the coefficient of kinetic friction between the refrigerator and the floor

You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 194 kg, and you need to exert a force of 349 N to make it just begin to move. After it starts moving,

Scientifically, without religion, could a soul, spirit, essence, exist before and after the body dies

I do not believe in religion nor will I ever again. I am speaking on strictly scientific terms. Could life after death exist? I believe, if it does, it is a scientific process and not a religious one.