Physics 1 - Questions from the Mark Scheme
100% Success
State one advantage and one disadvantage the petrol-driven generator has, when compared with a small wind-powered generator. - Correct Answer it is reliable -doesn't rely on weather.
It releases pollutants like carbon dioxide.
The dynamo generates an electric current by induction. Explain what is meant by induction of a current. - Correct Answer relative movement between magnet & coil. Voltage produced without battery. It will induce a voltage that makes current flow in a circuit.
Another main sequence star has a mass greater than the mass of our sun.
State the next stages in the evolution of this star, before it becomes a neutron star. - Correct Answer From main sequence star, it will swell up to create a super red giant. Then contraction of matter will occur causing an explosion - SUPERNOVA
In a main sequence star, fusion in the core generates thermal energy. As a result, the hydrogen and helium ions are pushed outwards.
Explain why these ions do not just quickly move outwards. - Correct Answer Force of gravity gives inwards force on particles.
Balances outward force on particles.
Some light is emitted with a wavelength of 600 nm from our sun.
When measured in the spectrum of another star, the light has a wavelength of 598.8 nm.
Explain what information this gives about the star. - Correct Answer Star moving towards Earth Wavelength has decreased.
Frequency is larger (blue-shift).
A cork floats on some of the water.
Describe how this arrangement can be used to show whether waves on the water surface are transverse or longitudinal. - Correct Answer makes wave on water surface
If cork and wave move in same direction, wave is longitudinal.
If cork and water move at right angle, wave is transverse. The diagram shows water waves approaching a boundary between deep water and shallow water. The arrow shows the direction of travel of the water waves.
The wave speed in the shallow water is less than the wave speed in the deep water.
The frequency of the waves in the shallow water is the same as their frequency in deep water.
Explain what happens to the direction of the wavelength of these waves when they pass
from the deep water into shallow water. - Correct Answer Wavelength changes by decreasing through speed.
Direction changes by decreasing towards shallow water through speed.
Because of the great density of the deep water, the direction of the wave will bend slightly when exiting the deep water (refraction).
Scientists have used the properties of seismic waves to develop various models of the Earth's interior.
Explain how some of the properties of P-waves and S-waves lead to present model of the Earth's interior. - Correct Answer S-waves is transverse waves that cannot travel through liquids. When compared to P-Waves which can travel through both solids and liquids, it is a lot slower.
Gives evidence that Earth is made out of a liquid (and bobs it has solid properties).
Scientists can study different densities at different parts of the Earth's interior because of the way that P and S waves reflect and refract.
An ISS wing is in direct sunlight. Temperature of the wing remains constant.
Explain why the temperature of the wing remains constant in these conditions. - Correct
Answer rate of heat from the sun is absorbed equals rate of heat emitted.
Mantle is hotter near the core than near the crust.
Explain how this difference causes the tectonic plates in the Earth's crust to move. - Correct Answer Hot material raises causing material under the plate to move sideways
because of the uneven heating.
All earthquakes emit s-waves and p-waves.
These waves do not always travel in straight lines.
Explain why the S-waves and P-waves do not always travel in straight lines. - Correct Answer change in wave speed (because of the medium the waves travel through - refraction).
Change in density
Suggest what the sign of M indicates about the image produced by the lens. - Correct Answer shows whether the image is real or virtual.
100% Success
State one advantage and one disadvantage the petrol-driven generator has, when compared with a small wind-powered generator. - Correct Answer it is reliable -doesn't rely on weather.
It releases pollutants like carbon dioxide.
The dynamo generates an electric current by induction. Explain what is meant by induction of a current. - Correct Answer relative movement between magnet & coil. Voltage produced without battery. It will induce a voltage that makes current flow in a circuit.
Another main sequence star has a mass greater than the mass of our sun.
State the next stages in the evolution of this star, before it becomes a neutron star. - Correct Answer From main sequence star, it will swell up to create a super red giant. Then contraction of matter will occur causing an explosion - SUPERNOVA
In a main sequence star, fusion in the core generates thermal energy. As a result, the hydrogen and helium ions are pushed outwards.
Explain why these ions do not just quickly move outwards. - Correct Answer Force of gravity gives inwards force on particles.
Balances outward force on particles.
Some light is emitted with a wavelength of 600 nm from our sun.
When measured in the spectrum of another star, the light has a wavelength of 598.8 nm.
Explain what information this gives about the star. - Correct Answer Star moving towards Earth Wavelength has decreased.
Frequency is larger (blue-shift).
A cork floats on some of the water.
Describe how this arrangement can be used to show whether waves on the water surface are transverse or longitudinal. - Correct Answer makes wave on water surface
If cork and wave move in same direction, wave is longitudinal.
If cork and water move at right angle, wave is transverse. The diagram shows water waves approaching a boundary between deep water and shallow water. The arrow shows the direction of travel of the water waves.
The wave speed in the shallow water is less than the wave speed in the deep water.
The frequency of the waves in the shallow water is the same as their frequency in deep water.
Explain what happens to the direction of the wavelength of these waves when they pass
from the deep water into shallow water. - Correct Answer Wavelength changes by decreasing through speed.
Direction changes by decreasing towards shallow water through speed.
Because of the great density of the deep water, the direction of the wave will bend slightly when exiting the deep water (refraction).
Scientists have used the properties of seismic waves to develop various models of the Earth's interior.
Explain how some of the properties of P-waves and S-waves lead to present model of the Earth's interior. - Correct Answer S-waves is transverse waves that cannot travel through liquids. When compared to P-Waves which can travel through both solids and liquids, it is a lot slower.
Gives evidence that Earth is made out of a liquid (and bobs it has solid properties).
Scientists can study different densities at different parts of the Earth's interior because of the way that P and S waves reflect and refract.
An ISS wing is in direct sunlight. Temperature of the wing remains constant.
Explain why the temperature of the wing remains constant in these conditions. - Correct
Answer rate of heat from the sun is absorbed equals rate of heat emitted.
Mantle is hotter near the core than near the crust.
Explain how this difference causes the tectonic plates in the Earth's crust to move. - Correct Answer Hot material raises causing material under the plate to move sideways
because of the uneven heating.
All earthquakes emit s-waves and p-waves.
These waves do not always travel in straight lines.
Explain why the S-waves and P-waves do not always travel in straight lines. - Correct Answer change in wave speed (because of the medium the waves travel through - refraction).
Change in density
Suggest what the sign of M indicates about the image produced by the lens. - Correct Answer shows whether the image is real or virtual.
