What is meant by the capacitive current in a liquid dielectric when using AC to determine the resistivity as explained in the sentence below:

"Alternating current resistance measurements cannot successfully be made when the conductivity of a liquid solution is too low. This is because the capacitative current in the measuring cell may be so much larger than the resistive current that it prevents the latter from being determined accurately."

Derive the four equations of stellar structure as a function of M

Given that the average number of fast neutrons emitted following the thermal-neutron induced fission of 235U is 2.42 per fission event; use the following data to calculate the mean number of fission neutrons produced per initial thermal neutron in a large volume sample of
(a) pure 235U (b) natural uranium 238U, and (c) uranium enriched to 3% in the 235U isotope.
Note: The microscopic absorption cross section for 235U is 694 barns. The cross section for 238U is 2.71 barns. The fission cross section for 235U is 582 barns. Natural uranium contains 0.7% 235U.
Comment on you results in terms of operation of a thermal reactor of finite size.

Two 2.5-mm-diameter beads, C and D, are 11 mm apart, measured between their centers. Bead C has mass 1.0 g and charge 1.8 nC .Bead D has mass 2.5 g and charge -1.0 nC.

If the beads are released from rest, what is the speed vC of C at the instant the beads collide?

Express your answer to two significant figures and include the appropriate units.

What is the speed vD of D at the instant the beads collide?

Express your answer to two significant figures and include the appropriate units.

Which of the following statements are true for magnetic field lines? Check all that apply.

A.) Magnetic field lines are close together in regions of space where the magnitude of the magnetic field is weak, and they are farther apart in regions where it is strong.

B.) Unlike electric field lines, magnetic field lines are continuous.

C.) Magnetic field lines point in the direction of the magnetic force acting on a charge.

D.) At every point in space, the magnetic field vector at that point is tangent to the magnetic field line through that point.

E.) Magnetic fields can never intersect.

Four lawn sprinkler heads are fed by a 1.7 cm diameter pipe. The water comes out of the heads at an angle of 40 ∘ to the horizontal and covers a radius of 8 m .

A) What is the velocity of the water coming out of each sprinkler head? (Assume zero air resistance.)

Express your answer to two significant figures and include the appropriate units.

B) If the output diameter of each head is 3 mm , how many liters of water do the four heads deliver per second?

Express your answer using two significant figures.

C) How fast is the water flowing inside the 1.7 cm diameter pipe?

Express your answer to two significant figures and include the appropriate units.

m

Which of the following statements is true?

Select the correct answer

a.NONE OF THE STATEMENTS ARE TRUE

b.Electric forces depend on velocity of a charged object

c.Objects having a net charge experience only electric force, not magnetic force

d.It is impossible to separate the North and South poles of a bar magnet

e.Electric forces decrease with decreasing distance from charges, but magnetic forces do not decrease with decreasing distance from magnets

1. A uniform disk of mass M = 5.00 kg and radius r = 24.0 cm is mounted on a motor through its center. The motor accelerates the disk uniformly from rest by exerting a constant torque of 1.50 N · m.

(a) What is the time required for the disk to reach an angular speed of 8.50 ✕ 10² rpm?

(b) What is the number of revolutions through which the disk spins before reaching this angular speed?

2. A thin, hollow sphere of mass 1.60 kg and radius 0.560 m is rolling on a horizontal surface with a constant angular speed of 61.0 rpm. Find the total kinetic energy of the sphere.

A 590-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth's mean radius.

(a) Find the satellite's orbital speed.
m/s

(b) Find the period of its revolution.
h

(c) Find the gravitational force acting on it.
N

a. Why is hip movement and turning the knees important in improving a golf swing?

b. During the back swing, are you accelerating?

c. At the moment you reach the bottom of the swing you make contact with the ball. Explain how energy is transferred from the club to the ball

d. Why is there more stress on a golfers shoulders at the start of the swing, than when hitting the ball?

e. Why do you need to follow through on the swing?

f. What has happened when a golf shot is hooked?

g. What is the sweet spot on a club and what does it do?

h. What is a ping sound and how is it produced when hitting a golf ball?

The loop is in a magnetic field 0.22 T whose direction is perpendicular to the plane of the loop. At t = 0, the loop has area A = 0.285 m2.Suppose the radius of the elastic loop increases at a constant rate, dr/dt = 3.45 cm/s .

A)

Determine the emf induced in the loop at t = 0 and at t = 1.00 s .

Express your answer using two sifnificant figures

B)

Express your answer using two sifnificant figures.

A 10-cm-long thin glass rod uniformly charged to 8.00 nCnC and a 10-cm-long thin plastic rod uniformly charged to - 8.00 nCnC are placed side by side, 4.50 cmcm apart. What are the electric field strengths E1E1E_1 to E3E3E_3 at distances 1.0 cm, 2.0 cm, and 3.0 cm from the glass rod along the line connecting the midpoints of the two rods?

Ask for the  electric field strength E1, E2 and E3

Part C

Refer back to example 9-12. A bullet with a mass of m=8.10gm and an initial speed of vi=320m/s is fired into a ballistic pendulum. What mass must the bob have if the bullet-bob combination is to rise to a maximum height of 0.125 m after the collision?

Express your answer using two significant figures.

1. Use a table to compare the characteristics of pulse, MSV, and current mode operations as they are applied in radiation measurement system. (Lists the advantages and disadvantages of each)

An object moves along a straight line. The position as a function of time is given by the following
22 formula x(t)=5m+(2m/s)t–(0.6m/s)t^2. Please answer all of the parts, I will give a good rating**** :)

How long after starting does it take the object to pass the origin?
At what time is the object located 4 m from the origin?
Sketch the following graphs: x(t), v(t), a(t).
Find the object’s initial acceleration.
At what time will the object come to rest?