In a lab where the Helmholtz coil equation combined with energy conservation is used to determine the charge per mass ratio of the electron what are some random and systematic errors, how can they be minimized, and what does a vector diagram of the experiment look like? Can you explain to me how an experiment of this sort would look?

The active element of a certain laser is an ordinary glass rod 18.1 cm long and 1.16 cm in diameter. If the temperature of the rod increases by 70.3

A "seconds" pendulum is one that goes through its equilibrium position once each second. (The period of the pendulum is 2.000 s.) The length of a seconds pendulum is 0.9927 m at Tokyo and 0.9942 m at Cambridge, England. What is the ratio of the free-fall accelerations at these two locations? (Give your answer to at least 4 decimal places.) Cambridge /Tokyo =

You are holding a shopping basket at the grocery store with two 0.72-kg cartons of cereal at the left end of the basket. The basket is 0.81 m long.

Where should you place a 1.9-kg half gallon of milk, relative to the left end of the basket, so that the center of mass of your groceries is at the center of the basket?

I saw an answer for this on another question posted, but I don't think the answer was exactly what I was looking for. Can anyone help guide me in the right direction in regards to this question and its subquestions? Thanks.

The proton and electron are particles found to have equal and opposite charges to the precision that the measurements have been made so far. Why is it important that the proton and electron have exactly the same magnitude for the charge? What would happen if the proton and the electron did not have exactly equal and opposite charge? Give at least three specific examples and include at least one numerical calculation in your response.

A man in search of his dog drives first 10 mi northeast, then 39 mi straight south, and finally 1 mi in a direction 30° north of west. What are the magnitude and direction of his resultant displacement?

1. Two manned satellites approaching one another, at a relative speed of 0.250 m/s, intending to dock. The first has a mass of 4.0010³ kg , and the second a mass of 7.5010³ kg .

a) Consider the frame of reference in which the first satellite was originally at rest. Determine the momentum of the satellites before docking.

2. Determine the Kinetic energy of the satellites before docking.

3. Using conservation of momentum determine the velocity of the satellites after docking.

4. Determine the final Kinetic energy of the system.

5. What is the loss of kinetic energy in this inelastic collision (docking process)?

6. Repeat the calculation by using the frame of reference in which the second satellite was originally at rest. Explain why the change in velocity is different in the two frames, whereas the change in kinetic energy is the same in both.

Can someone please explain to me how electromagnetic induction is used in Cochlear implants?

Conservation of Angular Momentum

A female figure skater is spinning on ice. Assume that that the surface is basically frictionless. The skater is wearing weighted bracelets as part of the costume for the performance. These weighted bracelets weight .75 kg each. The skater has a spinning routine in the middle of the performance and initially starts spinning with arms stretched wide such that the weighted bracelets are 1 m from the axis of rotation. She has an initial angular velocity of 2LaTeX: \pi π rad/s with an initial moment of inertia of 2.5 kg * m2. The skater then pulls her arms in towards her chest so that the weighted bracelets are just 10 cm from the axis of rotation as this will allow a faster spin, her moment of inertia drops to 2.1 kg * m2.

Part 1. What is the initial angular velocity of this skater. (answer should be a whole number)

rev/s

Part 2. What is the initial kinetic energy the skater has? (give your answer to the nearest J)

J

Part 3. What is the final angular velocity of this skater. (give your answer to 3 significant digits)

rev/s

Part 4. What is the final kinetic energy the skater has? (give your answer to the nearest J)

J

QUESTION 1

1. A disk (radius 13.5 cm] rotates about a fixed axis through its center of mass and perpendicular to the disk. At t = 0 the disk is rotating at frequency 6.64 Hz, and it accelerates uniformly to frequency 27.6 Hz after spinning through 60.4 revolutions. Find the angular acceleration of the disk, in rad/s².   

QUESTION 2

1. The wheel of a cart has radius 64.6 cm. How many revolutions will it make if the cart goes 6.45 km?

A block having a mass of0.72 kg is given an initial velocity v_A = 1.3 m/s to the right and collides with a spring whose mass is negligible and whose force constant is k = 45 N/m as shown in the figure.

The spring is now mounted vertically on the table, and the mass is dropped downwards, hitting the spring and compressing it. Just before the "collision", the block has a measured velocity of 2.00 m/s downwards. What will be the maximum compression of the spring? (Friction is negligible.)

Why T1 relaxation time is temperature dependent?

Why T2 relaxation time is temperature dependent?

Explain it with theory.

These are complete questions. If you don't understand the questions, you are not qualified to answer them.

Carlos and Shannon are sledding down a snow-covered slope that is angled at 12.0° below the horizontal. When sliding on snow, Carlos’s sled has a coefficient of friction μ_k = 0.100; Shannon has a “supersled” with μ_k = 0.0100. Carlos takes off down the slope starting from rest. When Carlos is 4.00 m from the starting point, Shannon starts down the slope from rest.

How far have they traveled when Shannon catches up to Carlos?

How fast is Shannon moving with respect to Carlos as she passes by?

(A) Young's double-slit experiment is performed with 560-nm light and a distance of 2.00 m between the slits and the screen. The tenth interference minimum is observed 7.30 mm from the central maximum. Determine the spacing of the slits (in mm).

(B) What If? What are the smallest and largest wavelengths of visible light that will also produce interference minima at this location? (Give your answers, in nm, to at least three significant figures. Assume the visible light spectrum ranges from 400 nm to 700 nm.)

smallest wavelength _______nm

largest wavelength________nm