In the figure, the particles have charges q1 = -q2 = 390 nC and q3 = -q4 = 95 nC, and distance a = 5.0 cm. What are the (a) x and (b) y components of the net electrostatic force on particle 3?

A proton moving horizontally at a speed of 2.88x10^5 m/s enters a region of space between two

square metal plates of side length 8.77 mm. The proton's path is deflected an angle of 12º upward. Protons have a mass of 1.67x10^-27 kg.

a) Determine the electric field between the plates.

b)Determine the amount and sign of electric charge on each plate.

The rate at which a nebular cloud rotates increases as the cloud collapses to form systems of stars and planets. Consider a small segment of a nebular cloud with a mass ? of 1.9×1027 kg, tangential velocity ?initial equal to 6.8 km s−1 located at an orbital distance ?initial=2.5×104 km. After the cloud collapses, the same small segment is located at an orbital distance ?final=3.2×103 km. Calculate the change of the rotational velocity, Δ?, for the cloud segment, assuming perfectly circular orbits. Perform your work and report your solution using two significant figures.

What changes in the atomic structure cause the absorption and emission of photons (light)?

i) Absorption

ii) Emission

Please solve and explain all parts. I don't understand

You decide to play a trick on your friend by dropping a raw egg onto their head

The egg is dropped (no initial velocity) from a height of 15 meters. Your goal is to have the y position of the egg exactly match the height of your friend at the same moment he steps onto the red x you painted on the ground (not suspicious at all). Your friend has a height of 66.929 inches and is walking toward the building at a constant speed of 4.429 feet/second.

-Convert your friend's height into proper units. h = meters

-Convert your friend's speed into proper units. v_friend = meters/second

-Determine the time at which the egg's y-location equals your friends height. t(y_egg=h) = seconds

-Determine the starting position of your friend at the time you dropped the egg (enter a positive number). d = meters

Please solve and explain all parts

Many people assume that it is impossible for a car to turn in the absence of friction. If the roadway is banked at exactly the right angle, a car at exactly the right velocity will be put into uniform circular motion and execute the turn successfully.

Here the department of transportation has constructed a roadway that will cause your car to turn in a circle of radius R = 175.00 meters. The roadway itself is banked with an angle of θ = 20.0 degrees. Assume that your car has a mass of m = 950 kg.

Calculate all the following:

The normal force of the road on your car, N

The velocity of your car, v m/s

The time required to make a 90 degree turn, s

A 2750 lb car has a frontal cross-sectional area A of 22.4 ft², a drag coefficient C_d of 0.28, and a drive (or tractive) force of 280 lbs. Assume an air density of 2.3x10^-3 slug/ft^3.

^A.  Determine the acceleration of the car when it is driving at 31 mph on a level road.

B.  Determine the acceleration of the car when it is driving at 31 mph on a level road into a 7 mph head wind.

C.  Determine the acceleration of the car when it is driving at 31 mph up a 2.1 degree hill (no head or tail wind).

An ant, crazed by the Sun on a hot Texas afternoon, darts over an xy plane scratched in the dirt. The x and y components of four consecutive darts are the following, all in centimeters: (30.0, 38.0), (bx, -68.0), (-23.0, cy), (-83.0, -68.0).The overall displacement of the four darts has the xy components (-140, -19.0).What are (a) bx and (b) cy? What are the (c) magnitude and (d) angle (counterclockwise from the positive direction of the x axis) of the overall displacement?

Show that the reciprocal space of the BCC lattice forms an FCC lattice.
(Please explain every step)

In the famous Millikan oil-drop experiment, tiny spherical droplets of oil are sprayed into a uniform vertical electric field. The drops get a very small charge (just a few electrons) due to friction with the atomizer as they are sprayed. The field is adjusted until the drop (which is viewed through a small telescope) is just balanced against gravity, and therefore remains stationary. Using the measured value of the electric field, we can calculate the charge on the drop and from this calculate the charge e of the electron. In one apparatus, the drops are 1.40 mm in diameter and the oil has a density of 0.850 g/cm³.

a) If the drops are negatively charged, which way should the electric field point to hold them stationary? Up or down? Please explain your reasoning. (1)

b) If a certain drop contains four excess electrons, what magnitude electric field is needed to hold it stationary? Please express your answer to three significant figures. (2)

c) If you measure a balancing field of 5183 N/C for another drop. How many excess electrons are on this drop? Please express your answer as an integer. (2)

A golf ball hit from the tee at ground level lands 62 m ahead 3.0 s later. What was the initial speed of the ball and at what angle with the horizontal did it come out?

Three point charges are on the x-axis: q1 at the origin, q2 at 3 m, and q3 at 7 m.

A) Find the potential at the point (0, 4 m) if q1 = q2 = q3 = 2 µC. The Coulomb constant is 8.99 × 109 N · m2 /C 2 Answer in units of kV.

B) Find the potential at the point (0, 4 m) if q1 = q2 = 2 µC and q3 = −2 µC . Answer in units of kV.

C) Find the potential at the point (0, 4 m) if q1 = q3 = 2 µC and q2 = −2 µC . Answer in units of kV.