Podcasts about this physcast

This PhysCast calculates the phase difference between two beams of light that have travelled a different distance.

This PhysCast calculates the image from converging and diverging lenses.

This PhysCast calculates the wavelength of a photon emitted as a hydrogen atom makes a transition between energy states.

This PhysCast shows the calculation of the time taken for a radioactive sample to decay by a certain amount.

This PhysCast shows how to determine the possible quantum states of the hydrogen atom.

This PhysCast will look at a problem where a charged particle is moving through a potential difference.

This PhysCast will use the relationship between electric field and electric potential difference to calculate an electric field.

This PhysCast will look at an example of electromagnetic induction.

This PhysCast is concerned with combinations of resistors in a circuit.

This PhysCast will look at calculating the potential from a continuous charge distribution.

This PhysCast will look at two capacitors connected in series to a battery.

This PhysCast will look at a problem with electric potential for point charges.

This PhysCast will be looking at the electric field from point charges.

This PhysCast is going to deal with Coulomb's Law and investigating the forces between charged particles.

This PhysCast will look at using Gauss' Law applied to a problem using a charged wire.

This PhysCast is about capacitants, voltage and charge and combinations of capacitors.

This PhysCast is going to use Ohm's Law and the idea of electrical power to examine a lightbulb used with two different supply voltages.

This PhysCast will be analysing a complicated multi-loop circuit.

This PhysCast is going to look at the magnetic force on a moving charge.

This PhysCast is going to use Ampere's Law to calculate the magnetic field from a particular arrangement of a current carrying wire.

This PhysCast is will use Ohm's Law to look at the properties of a small electric motor.

This PhysCast is going to look at the resistivity of a piece of material and how to calculate the resistance of a particular arrangement.

This PhysCast will look at a problem using a circuit containing a resistor and an inductor in series with a voltage source - an RL circuit.

This PhysCast will look at the broadcast of a radio signal as an example of some properties of electromagnetic waves.

This PhysCast will look at an AC circuit containing a resistor and capacitor in series.

This PhysCast will look at the AC voltages across various components in an RLC circuit.

This PhysCast will be a conceptual discussion on electrix flux through a surface, and how it relates to the enclosed charge.

This PhysCast explores how to solve a 2D motion problem where the initial velocity has both horizontal and vertical components.

This PhysCast shows some examples of working symbolically with equations.

This PhysCast uses momentum conservation to examine a collision in 2D.

This PhysCast explores energy storage in a rotating flywheel.

This PhysCast calculates the speed of a tranverse wave travelling along a stretched spring.

This PhysCast deals with constructing a wave equation from some given information in a diagram.

This PhysCast is going to look at heat flowing through a material by conduction. Two identical sized rods, one made of gold and one made of silver, are joined end to end. The gold end is placed in boiling water and the silver end is placed in ice water. What is the temperature at the point where the rods connect?

This PhysCast is about simple harmonic motion. A 0.12 kg body undergoes simple harmonic motion of amplitude 8.5 cm and a period of 0.20 s. (a) What is the magnitude of the maximum force acting on it? (b) If the oscillations are caused by a spring what is the spring constant?

This PhysCast deals with rotational motion. A merry-go-round rotates from rest with an angular acceleration of 1.50 rad/s2. How long does it take to totate through the (a) first 2.00 rev and (b) the next 2.00 rev?

This PhysCast is about simple harmonic motion. Two springs are attached to a block which can oscillate on a frictionless floor. If the left spring is removed it oscillates at a frequency of 30 Hz. If instead the right spring is removed it oscillates at a frequency of 45 Hz. What frequency will the block oscillate at if both springs are attached?

This PhysCast has a 1 dimensional motion problem with constant acceleration. You rush on to the train station platform, but your train is already leaving. You stop and watch as two of the 8.0 m train carriages move past you. The first one takes 1.6 s to go by and the next one takes 1.0s. Calculate the acceleration of the train, assuming it is constant.

This PhysCast is about power and velocity. Riding your 14kg bike at a steady 18km/h (5.0 m/s) you experience a 30-N force from air resistance. If your mass is 68 kg what power must you supply on level ground and going up a 5 degree incline?

This PhysCast deals with one dimensional motion. An electric vehicle starts from rest and accelerates at a rate of 2.0 m/s2 in a straight line until it reaches a speed of 20 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 until it stops. (a) How much time elapses from the start to the stop? (b) How far does the vehicle travel from start to stop?

This PhysCast is going to analyse a problem of two connecting blocks using the work-kinetic energy theorem.. A 5.0 kg block is hanging by a string connected to a 3.0 kg mass via a massless pulley. The 3.0 kg mass sits on a flat table with a co-efficient of kinetic friction of 0.40. Starting from rest, what is the speed of the 5.0 kg mass when it has fallen 1.50 m?

This PhysCast explores the mathematics of simple harmonic motion.

This PhysCast is about the first law of thermodynamics. A closed by uninsulated container at room temperature containing 1 kg of water is shaken violently until the temperature rises by 5 degrees C. The mechanical work required in the process is 22 kj. a) How much heat is transferred during the shaking? b) How much mechanical energy would have been required had the container been perfectly insulating?

This PhysCast deals with simple harmonic motion where dampening is present. The amplitude of a lightly damped oscillator decreases by 3.0% during each cycle. a) What percentage of the mechanical energy is lost in each cycle? b) What is the dampening coefficient for the 100 g mass if the cycle time is 1 sec?

This PhysCast will apply Newton's second law of motion in its rotational form. A cylindrical satellite is 1.4 m in diameter with its 940 kg mass distributed uniformly. The satellite is spinning at 10 rpm but must be stopped for repairs. Two rockets provide 20 N of thrust each and are mounted on opposite sides to fire tangentially. How long must they be fired to stop the rotation?

This PhysCast looks at a conservation of energy problem. A 60 kg skier leaves the end of a ski-jump ramp with a velocity of 24 m/s directed 25 degrees above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed of 22 m/s, landing 14 m vertically below the end of the ramp. From the launch to the return to ground, by how much is the mechanical energy of the skier-Earth system reduced because of air drag?

This Physcast asks us to consider the motion of a block which is falling onto a spring. A 250g block is dropped onto a relaxed vertical spring that has a spring constant k = 2.5 Ncm-1. The block becomes attached to the spring and compresses the spring 12 cm before momentarily stopping. While the spring is being compressed, what work is done on the block by a) the gravitational force and b) the spring force? c) What is the speed of the block just before it hits the spring? (Assume that friction is negligible).

This PhysCast is about uniform circular motion. A puck of mass m1 is rotated in a circle of radius R on a frictionless air-hockey table. It is connected to a stationary, suspended mass m2 by a cord passing through a hole in the table. Find a) The tension in the cord b) The speed on the puck c) The period of the rotation.

This PhysCast is going to look at a very commonly used example in collision physics - the Newton's Cradle.

This PhysCast is going to look at standing waves on a stretched string. A 45 gram string is tightly stretched and fixed firmly at each end. The tension in the string is 78 N, and it vibrates with its 3rd harmonic at 120 Hz. How long is the string?

This PhysCast is going to look at a problem involving static equilibrium. A 60 kg child sits at the end of a 2.4 metre board supported by a p;ivot, 80 cm away, and a scale at the other end. If the scale reads zero, what is the mass of the board.

This PhysCast is going to examine an example of using the first law of thermodynamics to analyse a cyclic process.

This PhysCast will look at a problem involving a merry go round with some people jumping onto it.

This PhysCast is about oscillatory motion. Two identical springs of spring constant 7580 Nm-1 are attached to a block of mass 0.295 kg. What is the frequency of oscillation on a frictionless floor?

This PhysCast will analyse a motion problem using conservation of energy. A 1.25 kg ball is attached to the ground by a spring with k = 22 N/m and upstretched length of 0.55 m. The ball is thrown straight upwards, being released when it is 1.0 m above the ground, moving at 12.0 m/s. How fast is the ball moving when it is 2.0 m above the ground?

This PhysCast is going to look at static equilibrium applied to a ladder leaning against a wall. A ladder of mass m and length L is leaning against a wall. The wall is frictionless and the coefficient of static friction between the ladder and the ground is mu. Find an expression for the minimum angle which the ladder can be lent without slipping?

This PhysCast looks at objects colliding and how to analyse them in terms of momentum. A child on a skateboard is moving along a horizontal surface at 5.0 m/s, when they collide with a rubber ball rolling towards them at 3.5 m/s. The ball has a mass of 2.2 kg, and after the collision is moving at 6.0 m/s opposite to its intial motion. The combined mass of the child and their skateboard is 45 kg. What is the velocity of the skateboarder after colliding with the ball?

This PhysCast is about thermodynamic processes. One mole of oxygen (assume it to be an ideal gas) expands at a constant temperature of 310 K from an initial volume V1 = 12 L to a final volume V1 = 19 L. How much is done by the gas during expansion?

This PhysCast deals with a problem involving 1 dimensional motion. A ball is thrown straight upwards and reaches a maximum height of 5.2 m. (a) What was the ball's initial speed? (b) How long did it take for the ball to reach the top of it's flight?

This PhysCast will go through some basics of using vectors.

This PhysCast is going to deal with a problem that has a block being pulled up a ramp and how we can apply Newton's 2nd Law to analyse it. A 14.0 kg block is pulled up a frictionless ramp by a 70.0 N force parallel to the ramp. The ramp is inclined at 25 degrees to the horizontal. If the block is initially stationaly, how far does it move in the first 3.0 seconds?

This PhysCast will look at converting between different sets of units. A car travels at 100 km/h. What is the speed in m/s?

This PhysCast focuses on the laboratory analysis techniques that you are required to use in energy and motion in the 5 labs.

This Physcast follows on from the first momentum tutorial (Rathkeale Physics - Momentum 1). It involves two stationary ice skaters pushing apart on ice. Conservation if momentum is used to determine the velocity of one of the skaters.