1. The Electric field will always be zero inside a conductor that is in electrostatic equilibrium.   What if the electric field wasn’t zero?

2.  Sometimes an electric ground is called a charge reservoir. Explain why this is appropriate.

3. An electric dipole is a common arrangement of charge in matter; water is one example. Where does the electric field created by an electric dipole become zero? Explain.

4. Sketch the approximate electric field pattern below due to two isolated negative point charges. Be sure to include directions on your electric field lines.

A. Determine the maximum absorbance wavelength for the dye (Amaranth) in nm (use internet or ask me for alternative method if you don't have regular access) and in a few sentences explain what is happening when inside the instrument when an absorbance spectra is being acquired. What are the units on the y-axis (ordinate) of the graph? What would be the problem with using a acrylic cell when the sample absorbs in the UV region of the EM spectrum? Explain IN DETAIL (including what glassware you would use, etc.) how you would prepare 10 standards of stock solution and do one calculation showing how the stock solution (3.0e-03 M) would be diluted to the most concentrated standard (3.0e-05 M) and what the purpose of using standards is when determining an unknown sample.

Given multiple conductors surrounding a finite volume each at a given potential, the Laplace Equation allows one to calculate the potential within the region and than of course the electric field as well as the induced surface charge densities on the conductors. Develop numerical solution methods to implement these solutions, develop visualization tools such as contour plots to show the internal potential and electric field lines. Focus on Cartesian geometries

Can you explain me how exactly does the image method works in a conducto,r with spheric cavity(radius R) with a charge inside ,when is grounded and when it isnt?

If the conductor is grounded it means there there is a flow charges from inside to the outside of the conductor without changing the potencial of the conductor's surface. The main property of a conductor is that the electric field inside is zero. If I have a charge inside of the cavity I need to place an imaginary charge inside or outside of the cavity? In a simpler scenario with a grounded sphere, If I want to calculate the electric field outside of the sphere I place an imaginary charge inside of the sphere, so they cancel each other, and in this case i want the exact same thing , the field outside the conductor, right? But if the charges cancel, and the conductor is grounded where is the electric field?

In the case the conductor isnt grounded I really dont get it...

Briefly describe the following terms as used in laser technology:

Laser performance                            [4]

Q-switching                                [4]

1. A cosmic ray proton moving toward the Earth at 5.5 × 107 m/s experiences a magnetic force of 1.65 × 10-16 N .

What is the strength of the magnetic field if there is a 45º angle between it and the proton’s velocity?

2.   A 2.25 m segment of wire supplying current to the motor of a submerged submarine carries 950 A and feels a 3.9 N repulsive force from a parallel wire 5.00 cm away.

What is the magnitude of the current in the other wire in A?

1. A box is pushed across a rough horizontal floor by a force acting parallel to the floor in the direction of motion. A force doing negative on the box is------
   1. gravity
   2. friction
   3. the applied force
   4. normal force of the floor upward on the body

In SPECIAL RELATIVITY, what or why is - choose one of the three alternatives each for a) - d)

a) AN EVENT (1. A line in spacetime - 2. A point in spacetime - 3. A space in spacetime)

b) GENERALLY REFFERED TO AS "THE INTERVAL" (1. Time interval between events - 2. Space interval between events - 3. Spacetime interval between events)

c) TIME MULTIPLIED WITH SPEED OF LIGHT (1. To give time the same unit as space - 2. To make sure time is always moving forward - 3. to avoid particles to move faster then the speed of light)

d) FOR ALL OBSERVERS (1. Space is euqal - 2. Time is equal - 3. Spacetime is equal

4. Consider an electric dipole of charge q that is centered on the origin where the two charges lie on the y axis and are separated by a distance d.

a. Determine the electric field at an arbitrary position near the dipole. In other words, determine E~ (x, 0).

b. An electron is released from rest at the point (L, 0). Determine the acceleration of the electron at the moment it is released.

c. A proton is released from rest at the point (L, 0). Determine the acceleration of the proton at the moment it is released.

please just show a small hint on how I can include these component on the design point please

please I know it might take your time and I am really sorry for that also I appreciate  the time and effort you will put onto this

thank you very much

Clear description and/or sketch of product

• Energy

• Thermodynamicso

• Matter/Materialso

• Radiation

• Electrochemistry

• Waves

A private space company wants to be the first to start mining in space. This could be the moon, asteroids or Mars. They need a robust (and ideally reusable) rocket for transporting equipment (and possibly people) to the mining base.

• Some of the design points are:

  1. The rocket should use Liquid Propulsion as it will make the rocket easier to be controlled and also make the rocket more reusable.

  2. Using Liquid Propulsion system will reduce the number of thrusters required for controlling the vehicle. We could use gimbal controls at the nozzle of the rocket to maneuver the rocket.

  3. We should use reliable components during the engineering of the rocket, to make sure the components can undergo stress and strain for many times repeatedly and can be readily used again and again.

  4. We could use pyrotechnics and parachute based system to control the speed of the rocket when it is landing back.