# Physics 2

If you are standing 100 m away from the starter at a track meet, how long will it take you to hear the sound from the gun after it is shot?

A concert A has a frequency of 440 hertz. What is its wavelength, and what is the frequency and wavelength of an A one octave higher?

The soda bottle in the above question is 1/3 full. What is the resonant frequency of sound produced when you blow across it?

An organ pipe is 78 cm long. What is the resonance frequency of sound it produced if it is: A. Open? B. Closed?

A wave travelling on a slinky has a period, T = 0.25 s, and a wavelength, $\lambda$ = 0.3 m. Find the frequency and speed of the wave.

A 2 m long string is tied down at one end and held by a person at the other end. The mass of the string is 4 kg. The person pulls the string taut with a tension of 72 N and shakes the string with a frequency of 2 Hz to produce a standing wave. Find the wavelength.

A tube is open on one end and closed on the other. Find the largest and second largest wavelengths.

In the figure below, L = 1.0 mm, q$_1$ = +3 nC, q$_2$ = -2 nC, and q$_3$ is +4 nC. Find the magnitude and direction of the net electrostatic force on q$_3$

What is the direction of the electric field at the center of the square?

Two charged plates are set up as pictured below. A charged ball of mass m and charge q is to be thrown between the plates with initial velocity V$_0$. The ball is a vertical distance, d, from either of the plates. Find how far down range the ball travels.

A charged ball of mass m and charge Q is hung from a mass less pendulum. A uniform electric field along the horizontal causes the pendulum to swing up an angle $\theta$. Find the magnitude of the electric field.

An electron is released from rest at the surface of a very large plate of charge density -50 $\frac{nC}{m^2}$ . How long will it take for the charge to move 10 cm?

Below is a figure depicting a uniform electric field, E = 400 N/C at an angle $\theta$ = 40$^\circ$ above the horizontal. The red line represents a rectangle, going into the page, with area, A = 0.20 m$^2$. Find the electric flux through the rectangle.

A uniformly charged sphere has a radius of 40 cm and a total charge of 80 nC spread throughout its volume. If the following sections were removed from the sphere, how much charge would they contain?

A. A Spherical section with a radius of 10 cm

B. A cubical section with sides of 5.0 cm

C. A cylindrical section with radius 8.0 cm and length 15 cm

Find the total potential energy this set of point charges contains.

A circuit has 3 capacitors in series, A = 5 $\mu$F, B = 10 $\mu$F, C = 20 $\mu$F, with a 10 V battery. Find the potential difference across each individual capacitor.

What are the charges and voltage drops across each capacitor?

Find current and potential difference for each resistor.

A circuit has the following R = 10 k$\Omega$, C = 25 $\mu$F, $\epsilon$ = 12 V.

How long will it take to charge the capacitor, C, to 10 V ?

How much current is flowing in the circuit at that time?