Edexcel GCSE Combined Science Paper 5: Physics 1 Higher June 2019 question paper 1SC0/1PH

Which colour of visible light has the longest wavelength?

Some television remote controls use infrared radiation and other remote controls use radio waves.

Explain why an infrared remote control may not switch on the television from behind an armchair but a radio wave remote control always will.

Figure 1 is a diagram of a water wave.

A cork is floating on the water.

Use the scale on the diagram to measure the wavelength of the wave.

wavelength =_........ cm

Describe the motion of the cork.

You should include how the cork moves relative to the direction of travel of the wave.

A different water wave has a wavelength of 0.25 m and a frequency of 1.5 Hz.

Calculate the wave speed.

wave speed =_........ m/s

Carbon-13 and carbon-14 are isotopes of carbon.

Nuclei of carbon-13 and carbon-14 can be represented by these symbols

13 14

Complete the table for an atom of carbon-13 and an atom of carbon-14.

State the name of an instrument that can be used to measure radioactivity.

State two sources of background radiation.

Carbon-14 is radioactive and has a half-life of 5 700 years.

The number of radioactive carbon-14 atoms in a very old piece of wood is found to have decreased from 1 000 000 to 125 000.

Determine the age of the piece of wood.

age of wood =_........ years

Carbon-14 decays into nitrogen-14.

The symbol for nitrogen-14 is¹⁴₇N

Explain what happens in a carbon-14 nucleus when it decays to a nitrogen-14 nucleus.

Figure 2 shows a way of projecting a small trolley up a sloping track.

When the button is pressed, a spring is released in P that projects the trolley up the track.

The trolley travels up the track, stops and then rolls back down.

The spring in P always exerts the same force when projecting the trolley.

A student investigates how the mass of the trolley affects the maximum vertical height, h, reached by the trolley.

State the measurements the student should make to complete the investigation.

You should make use of the equipment shown in Figure 2 and any other equipment that is needed.

Figure 3 is a graph of the student’s results.

The student states that the energy transferred by the spring is the same each time it is used.

Use data from any two points on the graph in Figure 3 to support this statement.

Describe how the student could extend the investigation to determine the average speed of the trolley as it rolls back down the track.

The diagram in Figure 4 shows two students, P and Q, trying to measure the speed of sound in air.

P will clap his hands together.

When Q sees P clap his hands, she will start a timer.

When Q hears the clap, she will stop the timer.

Explain one way the students could improve their method.

Figure 5 shows a long metal rod and a hammer. The rod is hit at one end by the hammer. This causes a sound wave to travel along the inside of the metal rod.

Describe how hitting the rod causes a sound wave to travel along the inside of the rod.

Sound travels slower in air than it does in water.

Figure 6 shows the direction of travel of a sound wave approaching a boundary between air and water.

The sound wave refracts at the boundary between air and water.

Complete the diagram in Figure 6 to show the direction the sound wave travels in the air.

Sound travels slower in cold air than it does in warm air.

The equation relating the speed of sound in air to the density of the air is

The table in Figure 7 gives some data about the speed of sound in air and the density of air.

Use the equation and the data in the table in Figure 7 to calculate the speed of sound in warm air.

Give your answer to an appropriate number of significant figures.

speed of sound in warm air =_........ m/s

The force that keeps an object moving in a circular path is known as the

Figure 8 shows an object moving in a circular path.

Draw an arrow on Figure 8 to show the direction of the force that keeps the object moving in a circular path.

The object in Figure 8 is moving at constant speed.

Explain why it is not moving with constant velocity.

Figure 9 shows a skier on a slope.

The skier travels down the slope with a constant acceleration.

The speed of the skier is measured at points P and Q.

The table in Figure 10 gives some data about the skier making one downhill run.

Calculate the distance from P to Q.

Use an equation selected from the list of equations at the end of this paper.

distance from P to Q =_........ m

Calculate the time taken for the skier to travel from P to Q.

time from P to Q =_........ s

Some sunglasses have photochromic lenses.

Photochromic lenses are clear when the lenses are indoors but they darken in bright sunlight to reduce the effects of the sunlight.

Photochromic lenses react to ultraviolet light.

Suggest a benefit of making the lenses go dark with ultraviolet light.

Radio waves from Jupiter take 40 minutes to reach Earth.

Light waves from the Sun take 8 minutes to reach Earth.

Calculate how many times further it is from Earth to Jupiter than from Earth to the Sun.

State the property of electromagnetic radiation that is used in your answer.

_........ times

property_........

Ultraviolet waves cover a range of frequencies.

Scientists divide this range into three types, UVA, UVB and UVC.

The table in Figure 11 shows the frequency range for each type.

type	frequency range in Hz
UVA	7.5 1014 to 9.4 1014
UVB	9.4 1014 to 10 1014
UVC	10 1014 to 30 1014

Figure 12 is a diagram about the effect that the Earth’s atmosphere has on three types of ultraviolet radiation.

Describe how the effects change with wavelength, using information from Figure 11 and Figure 12.

The width of the arrows drawn indicates the amount of radiation that is involved.

Calculations are not required.

*(d) Radio waves and gamma radiation are at opposite ends of the electromagnetic spectrum.

Compare how these two electromagnetic radiations are produced.