atuljangir

The nucleus of a Xe 125 atom an isotope of the element xenon with mass 125 u is 6.0 fm in diameter. It has 54 protons and charges q=+54e.

What is the electric force on a proton 1.7 fm from the surface of the nucleus? Hint: Treat the spherical nucleus as a point charge.


What is the proton's acceleration?

The nuclei of large atoms, such as uranium, with 92 protons, can be modeled as spherically symmetric spheres of charge. The radius of the uranium nucleus is approximately 7.4×10^-15m. What is the electric field this nucleus produces just outside its surface? What magnitude of electric field does it produce at the distance of the electrons, which is about 1.7×10^-10m? The electrons can be modeled as forming a uniform shell of negative charge. What net electric field do they produce at the location of the nucleus?

As a train accelerates away from a Station, it reaches a speed of 3.9 m/s in 7.2 seconds. If the train's acceleration is constant, what is it's speed after an additional 4.5 seconds have elapsed?

A) 3.8 m/s

B) 4.2 m/s

C) 5.7 m/s

D) 6.3 m/s

12-gauge copper wire has a radius of 1.03×10^-3 m. (A) What is the resistance of 11.5 m of this wire at 20°C? (B) How much current will pass through the wire if a potential difference of 9.00 V is applied across it?

Consider the cell diagram Mg(s)| MgSO4 (0.40M) || NiSO4 (0.60M) |Ni(s). Calculate the cell voltage at 25?. How does the cell voltage change when: a. [Mg^(2+) ] is decreased by a factor of 4 b. [Ni^(2+) ] is decreased by a factor of 3

The windings of a DC motor have a resistance of 6.00 ohms. The motor operates on 120 V AC, and when running at full speed it generates a back emf of 105 V. What is the starting current of the motor?

The rocket’s 40 W motor is plugged into a 100 V outlet for 3 minutes.

a)How much current does the motor require?

b)What is the resistance of the motor?

c)How many electrons pass through the motor?

d)What amount of energy (in Joules) does the motor require?

e)What amount of energy (in kWh) does the motor require?

f)If electricity costs $0.13/kWh, how much will it cost to run the motor for 50 minutes?

Suppose the cost function for your firm is: C = 10 +2Q + 5Q².
If the firm sells output in a perfectly competitive market and other firms in the industry sell output at a price of $35, what level of output should the firm produce to maximize profits or minimize losses? What will be the level of profits or losses in the firm makes optimal decisions?

Suppose that we have two contestants on "The Biggest Loser."William's starting weight is 352 pounds and loses down to 187 pounds.Karen's starting weight is 453 pounds and loses down to 245 pounds.

Answer the following questions in your post. The post should be written in complete sentences and include proper punctuation.

1..What kind if feelings/emotions/thoughts did this activity elicit in you? Why

2. Who deserves to win? Make your case and support your reasoning

A Perfectly competitive firm whose total cost equation is TC = 6 + 33Q − 9Q2 + Q3 can sell its entire output for 18 cedis per unit.

A. Derive the firm’s total revenue and profit functions.
B. What output should the firm produce in order to maximize profit. What is the profit level?
      

Chloroacetic acid has a dissociation constant of ka =0.000138 calculate the degree of dissociation for 0.0825m solution of this acid using the Debye -Huckel limiting law