Waves on a string

A wave on a string is described by the equation y=12cos(1.57 x - 6.28 t). The lengths are measured in cm and time is s. Determine, (a) the amplitude, frequency, and the the time it takes for the wave to repeat itself. (b) the speed of the wave and the distance a peak of the wave travels at 3T + .5 s.

Natural frequency

When a pencil is dropped it emits a range of natural frequencies i.e 200Hz 180Hz 150Hz 160Hz are these 1 Released from the pencil at the same time or at time intervals 2. Is there a pattern between the frequencies emitted ie is the 200 then 180 then 160Hz in decreasing value or are they random 3. What causes thes ...continues

Electric charge

Find the net charge of a system consisting of (a) 6.15 x 10^6 electrons and 7.44 x 10^6 protons or(b) 212 electrons and 165 protons.

Electric charge

How much negative electric charge is contained in 2 moles of carbon?

electric charge

A container holds a gas consisting of 1.50 moles of oxygen molecules. One in a million of these molecules has lost a single electron. What is the net charge of the gas?

Electric Charge

When adhesive tape is pulled from a dispenser, the detached tape acquires a positive charge and the remaining tape in the dispenser acquires a negative charge. If the tape pulled from the dispenser has 0.14 micro C of charge per centimeter, what length of the tape must be pulled to transfer 1.8 x 10^13 electrons to the remaing ...continues

Electric Charge

A system of 1525 particles, each of which is either an electron or a proton, has a net charge of -5.456 x 10^-17 C (a) How many electrons are in this system? (b) What is the mass of this system?

Coulomb's Law

At what seperation is the electrostatic force between a +11.2 - micro C point charge and +29.1-micro C point charge equal in magnitude to 1.77 N?

Coulomb's Law

The attractive electrostatic force between the point charges +8.44 x 10^-6 C and Q has magnitude of 0.975 N when the separation between the charges is 1.31 m. Find the sign and magnitude of charge Q.

Coulomb's Law

Two point charges, the first with a charge of +3.13 x 10^-6 C and the second with a charge of -4.47 x 10^-6 C, are separated by 25.5 cm. (a) Find the magnitude of the electrostatic force experienced by the positive charge. (b) Is the magnitude of the force experienced by the negative charge greater than, less than, or the same a ...continues