A doubly charged helium atom whose mass is 6.6 10-27 kg is accelerated by a voltage of 2400 V.?
Here's how you approach the problem. 1. First you need to determine what speed the particle is going after being accelerated by the electric field. So how much kinetic energy would this particle have if it is accelerated by 2400V? You get the answer by understanding how the charge of the particle and the voltage relate to the kinetic energy. Then you know that kinetic energy is equal to (1/2)mv^2 and they give you the mass, so you can calculate the velocity. 2. Now that you have the velocity, you recall that if a moving charged particle encounters a magnetic field, its path will start to curve in a circle because the magnetic field exerts a force that is perpendicular to velocity and perpendicular to the direction of the magnetic field. You need to determine how much magnetic force is exerted on the particle in a .344T magnetic field with the velocity that you've calculated. 3. This force will be a centripetal force pulling the path into a circle and you know that centripetal force is equal to mv^2/R where R is the radius of the circle, so you know the mass, velocity and centripetal force (the magnetic force) and you can calculate R, which is what they want for part (a). For part (b) you need to figure out how long it takes the particle to move through 360 degrees or 2pi radians of circular motion. You could calculate the circumference of the circle and know the velocity so you could figure out the time, or you could calculate the angular velocity from the linear velocity and figure out how long it takes to sweep out 2pi radians. Either way would work.
Who is in charge of Google+?
Google+ is Social networking service site which is replace with Google Buzz which is lunched by Google .https://en.wikipedia.org/wiki/Google
Whats the APR if you charge 1000 on a credit card whose interest rate is 20 percent with an annual fee of 30?
20%
A doubly charged helium atom whose mass is 6.6 x 10^-27 kg is accelerated by a voltage of 2300 V.?
(a) First calculate velocity from energy balance: Assume negligible relativistic effects ΔE_kin = ΔE_el <=> (1/2)·m·v² = q·U => v = √(2·q·E/m) = √(2 · 2·1.6022×10-19C · 2300V / 6.6×10-27kg) = 4.726×10+5m/s Since v << c=3×10+8m/s assumption was correct. For stationary motion Lorentz force equals centripetal force on the moving atom m·ω²·r² = q·v·B <=> m·v²/r = q·v·B => r = m·v / (q·B) = 6.6×10-27kg · 4.726×10+5m/s / (2·1.6022×10-19C · 0.344T) = 0.0283m (b) T = 2·π/ω = 2·π·r/v = 2 · π · 0.0283m / 4.726×10+5m/s = 3.76×10-7s
Who is in charge of a precinct?
A Commanding Officer or Precinct Commander, who would be in the rank of Captain or Deputy Inspector, and sometimes but rarely, an Inspector. Typically, the busier or more politically relevant precincts would have a higher rank in charge (DI or Insp.).
Who is in charge of you being the best in the world?
Here's a quick trick to know:Go back to home screen.Open the front camera.Come back and read afterwards.The person you see in the camera is responsible for your best being and everything.It is the person who can make you everything or nothing.In short we can say that in two words :“ I AM ”These are the two powerful words which can make you anything you want.Image source: googleThanks,I Am YashPratap Kanthariya
If the person whose in charge of payroll suddenly leaves and doesn’t come back, what legal action can I take to ensure that I get my paycheck?
It will depend on the laws of your geography and your jurisdiction.If a company is incompetent to the point of having all of payroll activities be with just one person, then this is going to be a wake up call for them, and if you’re worried that you won’t be getting paid, then things are far worse than you’ve imagined and you should be looking for employment elsewhere.Competent management will have either service (through a bank or payroll processor) or backup option to ensure business continuity - payroll is a cost center (NOT a revenue generating activity), so this person is not a key employee, it’s a support staff.If indeed this was the only person who ran the payroll and who was accounting/finance/payroll/HR function in the company, then the boss better look for a replacement - and fast!If you are in US, you should look up the compensation section of the labor law applicable to the jurisdiction where it will be outlined just by when you ought to receive a paycheck; if this won’t happen, please look for another place of employment since I am sure you have your own financial commitments to meet, while inquiring with the attorney on just what it would take to get your money from this company.Please research all the fees and costs associated with that - you will likely be asked to pay an attorney on hourly basis while a lawsuit is being litigated, don’t know what your savings/financial situation is to support this process.
In a construction, who is in charge?
It always depends on the specific project and at what level you are asking about. The owner is almost always the final authority but most of the time the owner hires someone to be the project manager to make all of the decisions necessary to keep the project moving forward. This person may be an engineer, an architect or just someone who is experienced in constructing the type of project in question. Since there are no hard and fast rules on this, there really is no website that addresses your question.
Who is in charge of a police station?
In Australia it will be a Senior Sergeant which is equivalent to a US police Lieutenant .A small station of 4 or 10 people will have a sergeant in charge however in my Jurisdiction here is how it goes in a basic sized suburban police station with say 50 to 100 police.The police are constables (officers or deputies)they can be 0, 1 or 2 stripes. so that would beconstable /officer/deputyfirst class constable/ officer/ deputysenior constable/officer /deputyThey are the field/patrol officers who do the workNext is Sergeant who is the shift supervisor 3 stripesYou will have a1 or 2 Day shift sergeant1 or 2 Evening Shift sergeant1 or 2 Night shift sergeantThen there will be the station sergeant or administration Sergeant. They will be usually the most experienced sergeant. He works day shift and he checks everyone's work and oversees the day shift staff like the front counter staff the clerical staff and and the watch house staff. He does the rosters and he vets everything for the Officer in charge of the Station so the OIC only has to deal with what is necessary.Officer In Charge is a Senior Sergeant. That is a rank not just another Sergeant who is senior. In the US he would be called lieutenant I believe.The OIC is gazetted as the OIC like the captain of a ship and he can be on holiday or days off but he is the OIC until he is removed and that is made official by the Commissioner/Chief of Police.Other similar or higher ranking police such as other Senior Sergeants/ Lieutenants or Superintendents/Captains/ Commanders and such may have officers in that station but they are not in charge of the station the OIC is. They just have a section or an office there and they have their own area of responsibility that is not running that station.For example the Head of the entire region containing 4 police stations may maintain an office in that police station with his staff. He has to have an office somewhere right?Hope this helps.