The type of electromagentic radiation that is used to take pictures of the human skeleton

The product of mass and velocity

The principle which states that each point on a wave front acts as a source of secondary waves.

The unit of measurement equivalent to coulombs per second

The general term used to describe a system on which no external forces act

Power is defined as the rate...

Two cars, X and Y, are travelling in an easterly direction along a straight level road. The velocity of car X is 10 ms^-1 relative to the ground and the velocity of car Y is 5 ms^-1 relative to the ground.

The velocityif car X relative to car Y is...

Which ONE of the following is an example of a contact force?

A sound source approached a stationary observer at constant velocity. Which ONE of the following describes how the observed frequency and wavelength differ from that of the sound source?

Two light sources of the same frequence maintain the same phase relationship with each other. This is an example of...

Consider the three circuit components represented in the diagram.

Which ONE of the options below best represnts the names of the components in the correct sequence, from left to right

A positvely charged metal sphere X on an insulated stand is brought into contact with an identical neutral metal sphere Y on an insulated stand. The two spheres are then separated.

Which ONE of the following describes the charge on each sphere after they have been separated?

When the distance between the plates of a parallel plate capacitor is decreased, its capacitance...

Consider the types of electromagnetic radiation below:

(i)Gamma rays
(ii)X-rays
(iii) Infrared rays

Which of the above radiations have wavelengths shorter than that of visible light?

Which ONE of the following provides evidence that light behaves as particles?

Write down the magnitude and direction of the force that the ball exerts on the floor.

Calculate the velocity which the ball strikes the floor

Calculate the time that the ball is in contact with the floow if it bounces off the floor at a speed of 3.43 ms^-1

The ball takes 0.404 s from the moment it dropped until it strikes the floor.

SKetch a graph (not to scale) of position versus time representing the entire motion of the ball. USE THE GROUND AS ZERO REFERENCE.

Indicate the following on the graph:

- Height from which the ball is dropped

- Height reached by the ball after the bounce

- Time at which the ball bounces off the floor

Write down in words the principle of conservation of linear momentum

Calculate the speed of the block-bullet system immediately after the collision

Is this collision elastic or inelastic? Give a reason for the answer

The floor exerts a constant frictional force of 8 N on the block-bullet system as it comes to rest.

Calculate the distance that the block-bullet system moves after the collision

The girl accelerates uniformly from rest down the slide. She experiences a constant frictional force of 1,9 N.
The boy falls vertically down from the top of the slide through the height PR of 1,5 m. Ignore the effects of air friction.

Write down the principle of conservation of mechanical energy in words

Draw a labelled free-body diagram to show ALL the forces acting on the boy while falling vertically downwards

Draw a labelled free-body diagram to show ALL the forces acting on the girl as she slides down the slide

Use the principle of CONSERVATION OF MECHANICAL ENERGY to calculate the speed of the boy when he reaches the ground at R.

Use the WORK-ENERGY THEOREM to calculate the speed of the girl when she reaches the end of the slide at Q.

How would the velocity of the girl at Q compare to that of the boy at R if the slide exrets no frictional force on the girl? Write down only GREATER THAN, LESS THAN or EQUAL TO.

The observer continues measuring the frequency as he approaches, passes and moves away from the ambulance.

The results obtained are shown in the graph above.

The observed frequency suddenly changes at t=6s. Give a reason for this sudden change in observed frequency.

Calculate the speed of the car (take the speed of sound in air as 340 ms^-1

Calculate the distance x between the car and the ambulance when the observer BEGINS measuring the frequency

Which pattern A or B is a diffraction pattern?

Write down the name of the phenomenon that explains the formation of the red lines (unshaded area) in pattern A.

The monochromatic red light used to obtain pattern B has a frequency of 4.54 X10^14 Hz. The broadness of the central band, x, is measured as 20 cm when the distance between the screen and the slit is 1.5m.

Calculate the width of the slit

How will the broadness of the central band, x, change if the monochromatic red light is replaced with monochromatic blue light? Write down only INCREASES, DECREASES or REMAINS THE SAME

Write down the main function of a capacitor in a circuit

A high resistance light bulb and an uncharged parallel plate capacitor are connected in series with a 12 V battery and a switch S, as shown below. The internal resistance of the battery and the resistance of the connecting wires should be ignored.

Switch S is now closed and the capacitor charges.

Describe how the birghtness of the light bulb changes during the charging process.

The capacitor is NOW fully charged.

Write down the potential difference across the light bulb

The capacitor is NOW fully charged.

Write down the potential difference across the capacitor

The distance between the plates of the capacitor is 5.4 mm.

For the fully charged capacitor, calculate the magnitude of the electric field between the plates

For the fully charged capacitor, calculate the magnitude of the electrostatic force exerted on an electron between the plates

An electron is positioned 3.8 mm from the positive plate of the capacitor.Calculate the distance (in mm) between the electron and the negative plate

An electron is positioned 3.8 mm from the positive plate of the capacitor.

Calculate the work that must be done to move the electron to the negative plate (ignore the effects of gravitational force.

Write down the independent variable

Write down the variable that must be controlled.

Write down the conclusion that can be obtained from the graph

Using the gradient of the graph, calculate the resistance of resistor P.

In the circuit represented below, a battery of emf 30 V and unknown resistance r are connected to resistors, as shown. Ignore the resistance of the ammete and the connecting wires.

The current passing through the 10 Ω resistor is 0.6 A.

Calculate the equivalent resitance of the two resistors in parallel

Calculate the current through the 8Ω resistor

Calculate the internal resistance of the battery

Which component (P or Q) enables theis generator to produce DC?

What structural change must be made to this generator to change it to an AC generator?

Briefly explain why Eskom prefers using AC instead of DC for the long-distance transmission of electricity

AN AC generator delivers 240 V_rms to a 60 W light bulb. The peak current in the light bulb is 0.35 A.

Calculate the rms current in the light bulb

Calculate the resistance of the light bulb

Define the term photon

Each photon of light has an energy of 6,9 x 10-19 J. The cathode has a work function of 6,4 x 10-19 J.

Calculate the wavelength of the light

Each photon of light has an energy of 6,9 x 10-19 J. The cathode has a work function of 6,4 x 10-19 J.

Calculate the kinetic energy of the photoelectrons

How will the reading on the ammeter change if light of the same frequency, but of higher intensity, is used?

Write down INCREASES, DECREASES or REMAINS THE SAME. Fully explain your answer

How will the reading on the ammeter change if light of the same intensity, but of higher frequency, is used?

Write down INCREASES, DECREASES or REMAINS THE SAME. Fully explain your answer.