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Voltage potential difference

A negative point charge q1 = -4.0 nC is at the origin and a point charge q2 = +6.0 nC is on the +x-axis at +0.40m. Point A is at -0.20m and point B is at -0.50m on the x axis.What is the potential dif

Calculating Work and Speed (Physics)

1.A shopper pushes a grocery cart with a force of 75N at a constant speed of 0.75m/s foe an hour around a store. How much work does she do on the cart? 2. A ball of mass 240g is falling through the a

Physics NYB energy! charged objects! help!

Simon and Phil and Luke are arguing about NYB theory.Simon states that points in space surrounding a negative charged object have negative energy while Phil claims that the energy is positive.Luke say

Calculate the mechanical energy of a car. i need desperate help for my test!! please!!

A car has a mass of 0.098 kg and an initial velocity of 2.2 m/s. If h1 is 0.50 m and h2 is 0.30 m, calculate the mechanical energy, in joules, of the car at the low point before hill a. I tried a sim

How to derive kinetic energy formula to get Velocity

Ek=0.5mv^2 please show steps-What do you mean? Solve for velocity? I think you should go back and learn 3rd grade algebra before attempting physics. Here you go anyway: ½mv² = E mv² = 2E v² = 2E

Which cools down faster...(EASY 20 POINTS)

Hi, Which cools down faster a insulated beaker of hot water or a non insulated beaker of hot water. And please explain your answer. Please write your emails with your answer so if i feel your the best

General relativity orbits

I understand general relativity is the warping of space time and thats why objects fall towards it. But how do planets or moons orbit each other and not fall in?-Centrifugal force, outward, due to the

Help with AP Physics studying in 2 days!!!!!

Can someone studying or who teaches AP Physics B please help me, i only have 2 days to read and comprehend the entire AP Physics B syllabus from the review book. Our class of 14 did not intend everyo

Do you know anything about DC circuits

Part 1:In a circuit of two lamps in series, if the current through one lamp is 5 A, what is the current through the other lamp? Answer in units of A. Part 2: If 8 V is applied to the above circuit an

A current of 0.99 A flows in a wire. How many electrons are flowing past any point in the wire per second

The charge on one electron is 1.60e-19-0.99A is the same as 0.99 coulombs per second (0.99C/s). 1 electron carries 1.6E-19 coulombs You just divide: 0.99 / 1.6E-19 = 6.2 x 10E18 electrons per second.

What two properties of a working electric circuit change when.....

what two properties of a working electric circuit change when the resistance of a variable resistor in the circuit changes? thankssss guyss :)-The current and the resistance.-If you change the resist

Physics-Magnetism Need Help!

A duck flying due east passes over Atlanta, where the magnetic field of the Earth is 5.5e−5 T directed north. The duck has a positive charge of 4.0e−8 C. If the magnetic force acting on the duck is 4.80

A scientist named Albert Michelson won the Nobel Prize in Physics for measuring the speed of light.

He set up mirrors on mountains that faced each other, 35 kilometers away. Then he calculated how long it took light to reflect off of the mirrors. Why did Michelson place the mirrors so far apart? A

I need help with DC circuits

A 9.0 ohm, a 7.0 ohm and an 18.0 ohm resistor are connected in series with a 12.0 V battery. Calculate the equivalent resistance. Answer in units of ohms. What is the current in the circuit? Answer i

Why doesn't gravity make planes and birds fall out of the sky

It might sound stupid but I dont understand how planes and birds stay up but leaves and apples cant when they weigh less.I know that without gravity there is no weight (or mass) so planes must be bloo
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