A cube has positive charge +Q in all corners except for one, which has a negative point charge - Q. Let the distance from any corner to the center of the cube be r. What is the magnitude and direction of the of electric field at the center of the cube (point P)? P

Q: FA 3.60 kg mass is being rotated in the vertical plane at a constant speed of 5.00 m/s at the end of...

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Q: A ball is thrown straight up from point A, reaches a maximum height at point B, and then falls back ...

A: A ball is thrown upwards from point A , rises to a maximum height at point B and then falls downward...

Q: How much work in kJ is necessary to compress air in an insulated cylinder from 0.215 m to 0.035 m? U...

A: To solve this we generally make a few necessary assumptions. They are: The gas is ideal gas It is a...

Q: 3. An electron with speed if v=3.50 x 10° m/s is traveling parallel to an electric field of magnitud...

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Q: A hose shoots water straight up a distance of 2.5 m. The end opening on the hose has an area of 0.75...

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Q: A light ray passes through substances 1, 2, and 3, as shown. The indices of refraction for these thr...

A: Given :A light ray passes through 1,2 and 3 medium.  θ1$θ2 are angle of incidence and final refracti...

Q: Three charges were arranged and held in place in a straight line. The distance between the first two...

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Q: In the circuit below, the currents through the four resistors are as indicated. Use the junction rul...

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Q: The capacitance of a spherical capacitor with inner radius a and outer radius b is proportional to: ...

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Q: estion 1 of 9 The force of Earth's gravity pulls down on a snowflake as it floats gently toward the ...

A: The force of Earth's gravity pulls down on a snowflake as it floats gently toward the ground. What i...

Q: A ball sits at rest on a horizontal table top. The upward force that table top exerts on the ball (n...

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Q: Question 14 A displacement vector is 23 km in length and directed 65° south of east. What are the co...

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Q: A 2.0-N rock slides on a frictionless inclined plane. Which one of the following statements is true ...

A: Friction less incline plane it means there is negligible friction. Inclination of plane can be chang...

Q: A speed boat pulls a water-skier (with a mass of 100 kg) at a steady speed by a rope at 15 degrees a...

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Q: Your answer needs to have 2 significant figures, including the negative sign in your answer if neede...

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Q: A hose for firefighters has an inner diameter of 10.0 cm. The pressure inside the hose is 400 kPa hi...

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Q: the disk is 0.400 m. Find the emf generated between the brushes. When superconducting coils are used...

A: First we need to find formula for emf generated using basic definition of emf and magnetic flux.  Th...

Q: 30 km directly south of city B. A bus, beginning at city A travels 50 km at 37° north of east to rea...

A: Vector.  

Q: Please help! At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B ...

A: GivenDistance Between Ship A and Ship B=150 kmVelocity of ship A=35 km/hVelocity of Ship B=30 km/h 

Q: A small metal sphere, carrying a net charge of q1 = -2.50 µC, is held in a stationary position by in...

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Q: -In an experiment to verify newton's second law of motion using the atwood machine, a student obtain...

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Q: A conducting spherical shell of inner radius 4.00 cm and outer radius 5.00 cm is concentric with a 7...

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Q: The kinetic energy of a 4.0 kg object moving at 3.0 m/s is: 1. 12 J *2. 18 J 3. 36 J 4. 48 J

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Q: average speed of 60 kph East for 1 hr and then continue 80 kph North for 1.5 hrs. (a) What is your ...

A: Average speed.

Q: The current in a series circuit is 15 A. When an additional 8 Ω resistor is inserted in series, the ...

A: according to ohms law V = IR where I = current  V = voltage  R = resistance 

Q: Direction: Answer the following questions. 1. A charge of 4.50 x 10-8 C is placed in a uniform elect...

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Q: A unit called the beard-second is the length the average beard grows in 1 second. A beard-second is ...

A: Given 1 beard-second = 10×10-9 m

Q: Billiard ball collision in 2-D. Billiard ball A moving with speed vA= 2.5-m/s in the +x direction st...

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Q: of the top line is 30 V and the potential decreases by 10 V until the 0 V line is reached. Then, the...

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Q: You determine the average speed for your walking pace. If the measured distance of your trip is 100....

A: Given value--- distance = 100 +/- 0.5 . time = 60 +/- 0.3 . We have to find--- dv/v ?

Q: What is the importance of recording the room temperature and atmospheric pressure prior to the exper...

A: Temperature- temperature is an an important fundamental parameter which shows that whether a thermod...

Q: A man is trying to move an object (m 14.0 kg) by pulling upward on the rope at an angle of 53° above...

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Q: plastic cup of negligible mass contains 0.280 kgm of an unknown liquid at a temperature of 30.0°C. A...

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Q: When the car reaches point A, it has a speed of 25 m/s. After the brakes are applied, the speed is r...

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Q: 3. A mass is placed on an inclined at 36.0 degrees. The coefficients of friction are 0.265 (kinetic)...

A: The situation is shown below   We have R=mgcos36f=μR =μmgcos36

Q: How much power is needed to lift a 75-kg student vertically upward at a constant speed of 0.33 m/s? ...

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Q: A large weather balloon of mass 226.0 kg is filled with helium gas until its volume is 325.0 m3. Cal...

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Q: A train approaches a crossing at a velocity of 102 m/s. It sounds its horn, which has a frequency of...

A: velocity of train vs = 102 m/sfrequency f = 400Hzspeed of sound v =343 m/s

Q: Show that the wavelength of a photon, measured in angstroms, can be found from its energy, measured ...

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Q: In an experiment to determine the specific heat of copper, a piece of copper weighing 50.06 is first...

A: Given data: The mass of copper piece is mc=50.06 g. The initial temperature of piece is Ti=100℃. Th...

Q: A ball is thrown upward in the air with an initial velocity of 40 m/s. How long does it take to reac...

A: When an object is thrown upward in the air then the time taken to reach the highest point is the sam...

Q: A car travelling at 100 km/h strikes an unfortunate bug and splatters it. The force of impact is gre...

A: Your answer is option (c) same for the both

Q: ... Vo Horizontal Field As compared to the horizontal component of the velocity at point Y, the hori...

A: Answer : (C) Same The horizontal component of velocity incase of a projectile motion remains the sam...

Q: A person looks at a gem using a converging lens with a focal length of 13.8 cm. The lens forms a vir...

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Q: Given the following graph, calculate the slope and uncertainty in the slope. Period vs length T (s) ...

A: From the graph, x1,y1=16.05cm,22.60cmx2,y2=6.60cm,3.70cm ∆y=0.6 cm Determine the slope as below. m=y...

Q: A stationary firecracker explodes into two pieces. The piece shot to the right has a mass of 0.07 kg...

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Q: In the following sketch, what is the net force acting on the box?

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Q: A string can withstand a maximum tension of 80 N without breaking. It is being used to spin a 3.0 kg...

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Q: In the following sketch, what is the net force acting on the box? 10 N 5 N. A) A. 5 N to the right B...

A: We need to calculate the total force acting on the box.

Q: A car is moving at 50 mph initially on the road, then the engine suddenly shut down and the car cont...

A: Given Data:- Initial speed of the car is  v0=50 mph =50×1 mi1 h×1609 m1 mi×1 h60 min×1 min60 s =50×1...

Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.