Several Problems with different topics: Magnetism, Electricity, etc.

I need the process and the answers to the solutions. Not just the way to get the answers but also the values inserted in the process followed by a Answer = . Please take your time because I've gotten some way off answers and it cost me points on my test because I was mislead on my homework. I wrote this before and I am inclu ...continues

Electricity and magentism questions.

This is for Jhansi, Utter Pradesh, India OTA ID#103642 ONLY no others please.... Here are all the questions 1.After bungee jumping off a bridge, a person begins to swing as a pendulum, the rope being 77m long. The person's speed is 14m/s as it passes through it lowest point. A). Find the height to which it rises above thi ...continues

Sound frequency

Not sure how to do the question, can you please show me? A Battery-operated toy emites a singal at 1800Hz. It moves in a circle of a radius 1.2 m at 2.4 revolutions per seconds. What are the minimium and maximum frequencies heard by a stationary observer some distance away in the plane of the circle? Assume the speed ...continues

Calculating radiated power

The explosion of the firecracker in the air at a height of 40m produces a 100 db sound level at the ground below. If the threshold of hearing is 10-12Wm-2 what is the instantaneous total radiated power, assuming that it radiates as a point source?

Finding the sound wave

At an open-air concert a person sits at a location that is 7m and 9.10m, respectively, from speakers at each side of the stage. A musician plays a singale 494 Hz tone, explain what the listener hears. Assume the speed of sound is to be 346ms-1.

Electric field

If an electron enter a uniform magnet field having a flux density 200uT at a speed of 2x10 6 ms-1 perpendicular to the field. Determine the radius of its orbit, then find the required electric field strength, applied perpendicular to the magnetic field, if the electron is to be continue in a straight line on entering the combine ...continues

Electric potential due to rotating blade in a magnetic field

1.A helicopter has blades of length 3.0m, rotating at 2.0rev/s about a central hub. If the vertical component of Earth's magnetic field is 5.0*10^-5T, what is the emf induced between the blade tip and the central hub? 2.A bolt of lightning depicted in a picture passes 200m from a 100-turn coil oriented as shown. If the curr ...continues

Finding charges: Given the total charge only

Each of two small spheres is charged positively, the combined charge being 5 x 10^-5 C. If each sphere is repelled from the other by a force of one newton, when the spheres are two meters apart, how is the total charge distributed between the two spheres ?

Electric potential induced in a rotating rod.

A rod of length l is pivoted at one end rotates with uniform angular velocity w in a uniform magnetic field of intensity B. The magnetic fluxes are perpendicular to the plane of rotation of rod. Calculate the induced EMF across the two ends of rod.

X-ray production

X-ray production: dependence of wavelength and intensity on various parameters. Tips to remember.