Part A What must the charge (sign and magnitude) of a particle of mass 1.40 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 630 N/C ? Use 9.80 m/s? for the magnitude of the free-fall acceleration. > View Available Hint(s) ΑΣφ ? C Submit Request Answer Part B What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight? Use 1.67x10-27 kg for the mass of a proton, 1.60x10-19 C for the magnitude of the charge on an electron, and 9.80 m/s? for the magnitude of the free-fall acceleration. • View Available Hint(s) ΑΣφ N/C

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Why is C the answer?I need help figuring out this problem.

Below is a depiction of one type of adjustable dial. This dial is essentially a thin rod with a charged sphere on the end, seated inside an electric field. The sphere between these plates has a charge of −2.3 µC and the thin rod can be approximated as a string with tension 0.350 N, at an angle of 15° as shown below. a) What is the mass of the charged ball? g b) What is the magnitude of the electric field between the plates?N/C

Two metal spheres, one carrying a 8.0-μCμC charge and the other carrying a -24-μCμC charge, are initially 100 mmmm apart. They are brought in contact with each other and then moved back to their original positions.   Part A What is the numerical value of the ratio FEi/FEfFiE/FfE, where FEiFiE is the magnitude of the electric force between the spheres before they are brought in contact and FEfFfE is the magnitude of that force after they are brought together and then moved back to their initial positions?

Two 4.0 kgkg masses are 1.0 mm apart on a frictionless table. Each has 1.0 μCμC of charge.     Part A What is the magnitude of the electric force on one of the masses?   Part B What is the initial acceleration of each mass if they are released and allowed to move? Express your answer in meters per second squared.

Answer A and B on the image below.

The electric field at a point in space is E (400 i +700 ) N/C. Part A What is the x-component of the electric force on a proton at this point? Express your answer with the appropriate units. ► View Available Hint(s) (F)x = Submit Part B (F) y = μÀ Submit Value What is the y-component of the electric force on a proton at this point? Express your answer with the appropriate units. ▸ View Available Hint(s) μA Units Value Units ?

Protons of mass 1.68 x 1027 kg, traveling to the right with an initial velocity of 1 x 10° m/s, enter an electric field of 1x10 N/C directed into the plane of the page. The path followed by the protons is now: O the protons move at constant velocity into the plane of the page. O the protons are accelerated out of the plane of the page. the protons continue to move in a straight line to the right at velocity 1 x 10 m/s. O the protons are accelerated to the right. O the protons are accelerated into the plane of the page.

A proton enters the uniform electric field produced by the two charged square plates shown below. The plates carry charges +Q and -Q, where the magnitude Q=1 μC. The speed of the proton when it enters the region between the plates is 2 x 107 m/s. 12.0 cm- #3 3 Figure Description Hint a. What is the magnitude of electric field in the region? Assume that the plates are close enough together to be treated as "infinite" planes for electric field between them. N/C. Enter an integer or decimal number [more..] b. What distance d has the proton been deflected downward when it leaves the region between the two plates? Assume that the electrostatic force is the only force on the charge. d= E= Submit Question $ 4 cm. % 5 MacBook Pro <6 A 6 Hey & 7 We 8