The giant squid axon has a diameter of 100μm, a membrane thickness of 7.5nm, and a specific membrane capacity of 1μF/cm2. Draw a schematic of the axon, local charge distributions, and indicate the electric field vector across the membrane at rest. Calculate the magnitude of the electric field across the membrane.

Two systems are in oscillation: a simple pendulum swinging back and forth through a very small angle and a block oscillating on a spring. The block-spring system takes twice as much time as the pendulum to complete one oscillation. Which of the following changes could make the two systems oscillate with the same period?

A. Increasing the mass of the pendulum bob

B. Increasing the angle through which the pendulum swings by a small amount

C. Decreasing the mass of both the block and the pendulum bob

D. Shortening the pendulum

A rock is thrown off a cliff at an angle of 46° above the horizontal. The cliff is 120 m high. The initial speed of the rock is 21 m/s. (Assume the height of the thrower is negligible.)

(a)

How high above the edge of the cliff does the rock rise (in m)?

(b)

How far has it moved horizontally when it is at maximum altitude (in m)? m

(c)

How long after the release does it hit the ground (in s)?

(d)

What is the range of the rock (in m)?

(e)

What are the horizontal and vertical positions (in m) of the rock relative to the edge of the cliff at

t = 2.0 s,

t = 4.0 s,

and

t = 6.0 s?

(Assume the +x-direction is in the horizontal direction pointing away from the cliff, the +y-direction is up towards the sky, and x = y = 0 at the point from which the rock is thrown.)

mx(2.0 s)=

my(2.0 s)=

mx(4.0 s)=

my(4.0 s)=

mx(6.0 s)=

my(6.0 s)=

Two circular disks spaced 0.005 m (0.50 cm) apart form a parallel-plate capacitor. Transferring 1.10 ×10^9 electrons from one disk to the other causes the electric field strength to be 2.50 ×10^5N/C. What are the diameters of the disks? Express your answer with the appropriate units.

Compare and contrast the resistors and capacitors, separately combined, in a series and parallel settings.

Or

Describe house wiring and specify how parallel or series connections of bulbs and resistors affect the functions.

Please remember to always add references and provide substantial answers. Also, respond to one other post submitted by your peer - MORE RESPONSES ARE PREFERRED . This post needs to actually discuss the submitted work by your peer. In lieu of this, you can also respond to a post submitted by your professor. But, such a response too should be an actual discussion. An actual discussion is not merely stating, “Good job,” or other similar phrases. The references should not be from sources, such as Wikipedia, yahoo.com, answers.com, etc.

1. A 7.00 kg sled is initially at rest on a frictionless horizontal road. The sled is pulled a distance of 2.40 m by a force of 18.0 N applied to the sled at an angle of 24° to the horizontal. Find the change in the kinetic energy of the sled.

2. A 0.24-kg stone is thrown vertically upward with an initial velocity of 7.10m/s from a height 1.30 m above the ground. What is the potential energy of the stone at its maximum height relative to the ground?

Describe the process of combustion. How do flammable materials ignite?

Describe the three methods by which heat moves from one object or area to another.

Explain why it is important for an arson investigator to understand these concepts.

Think about the length of the record groove for every minute of music. Debate whether the record quality depends on the speed the record turns. Given the same size record, does a 33.33 rpm record have higher/lower/the same audio quality as a 45 rpm record?

Does a song on the outside of a 12 inch diameter record have the same/higher/lower audio quality as a song that plays closer to the center of the record?

After 500 years of drifting in space and a brief visit on board the flagship Draconia, Buck Rogers headed to the Federal Directorate of Earth in his spacecraft. His descent consisted of the following stages. Assume that each stage followed immediately after the preceding stage and that the acceleration during each stage was constant. Stage A: Friction with the atmosphere reduced the speed from 19,500 km/h to 1700 km/h in 4.0 min. Stage B: A parachute then opened to slow it down to 340 km/h in 100 s. Stage C: Retro rockets then fired to reduce its speed to zero over a distance of 75 m. (a) Calculate the spacecraft’s acceleration (m/s2 ) during each stage. (b) What total distance (km) did the spacecraft travel in each stage

What is the minimum pushing force required to move the block?

The block is moving and is still being pushed with the force found in part A. What is the magnitude of the friction force?

The block is moving and is still being pushed with the force found in part A. What is the magnitude of the acceleration of the block?

A vernier caliper consists of two scales, Main scale and a vernier scale. the vernier scale is made by dividing 19 main scale divisions into 20 parts. Least count of the main scale is 1mm. a) What is the least count of this vernier caliper. b) what is the uncertainty of this instrument. c) Describe zero errors associated with vernier calipers and reasons to occur zero errors.

PLEASE SHOW ALL CALCULATIONS AND EXPLANATION

A top-loading washing machine has a cylindrical tub that rotates about a vertical axis. The tub of one such machine starts from rest and reaches an angular speed of 2.0 rev/s in 7.0 s. The lid of the machine is then opened, which turns off the machine, and the tub slows to rest in 11.0 s. Through how many revolutions does the tub turn during this 18 s interval? Assume constant angular acceleration while it is starting and stopping.

Two charges are located in the ?–? plane. If ?1=−3.20 nC and is located at (?=0.00 m,?=0.640 m), and the second charge has magnitude of ?2=3.80 nC and is located at (?=1.50 m,?=0.550 m), calculate the ? and ? components, ?? and ??, of the electric field, ?⃗ , in component form at the origin, (0,0). The Coulomb force constant is 1/(4??0)=8.99×109 N⋅m2/C2.

A dipole moment, p = (2 Cm i) + (-5 Cm j) + (7 Cm k), is within an E = (-5 N/C i) + (6 N/C j) + (3 N/C k).

- Determine the potential energy stored by the dipole in the field.
- Determine the torque on the dipole by the field.
- Determine the angle between the dipole moment and the field.

explain how the rate of change of flux affects the induced E.M.F. in a conductor