Karteikarten
AQA - Physics 1F
Karten in diesem Stapel (23)
- 1There are many different energy resources. Which two energy resources are renewable? Biofuel, Coal, Gas, Geothermal, Nuclear fuelbiofuel geothermal
- 2Some non-renewable energy resources are more reliable than others. Which statement describes a reliable resource? It does not burn fuel. It is predictable. It will never run out. It is cheap to use.it is predictable
- 3The total power output of the wind farm is 19.6 MW All of the wind turbines have the same power output. What is the power output of one wind turbine?2.8 MW
- 4Give two reasons why people might not like having wind turbines near their homes.• visual pollution
• noise pollution
• dangerous to birds
• may lower house prices - 5Pic shows there are changes in the amounts of different energy resources used between 2014 and 2015. Explain the environmental impacts of the changes. (4)• less fossil fuel burnt
• more nuclear fuel used
• more renewables used
• gas remained the same
• less carbon dioxide released
• less greenhouse gases
• less global warming
• less acid rain
• less environmental pollution
• more hazardous waste produced (nuclear)
• the percentage generated by coal has decreased 8%
• the percentage generated by renewables has increased by 6%
• the percentage generated by nuclear has increased by 2%
- 6Why does a phone battery need recharging? The store of: chemical energy in the battery has reduced. thermal energy in the battery has reduced. kinetic energy in the battery has reduced. gravitational energy in the battery has reduced.the store of chemical energy in the battery has reduced
- 7A phones power source provides a current of 1.86 A at a potential difference of 3.90 V Calculate the power of the power source. Use the equation: power = potential difference × current Which is the correct unit C, J or W.P = 3.90 × 1.86
P = 7.254
W
7.254
(allow 7.25 or 7.3) - 8—(only) twice as heavy as the compact
(only) a third as heavy as the high capacity
allow mass / charge ratio
200 5
allow 40
allow mass / charge ratio
allow lowest mass / charge ratio
- 9Girl is skateboarding on a semi-circular ramp.Her mass is 50 kg Calculate the gravitational potential energy (g.p.e.) of the girl at the top of the ramp. Use the equation: g.p.e. = mass × gravitational field strength × height gravitational field strength = 9.8 N/kg (2)Ep =50×9.8×4.0
Ep = 1960 (J)
1960 (J)
- 10The girl has a speed of 7m/s at the bottom of the ramp. Calculate the kinetic energy of the girl at the bottom of the ramp. Use the equation: kinetic energy = 0.5 × mass × (speed)2Ek =0.5×50×72
Ek = 1225 (J)
1225 (J) - 11Not all of the g.p.e. has been transferred to kinetic energy. Which two statements explain why? (2). Some energy is wasted. The mass of the girl is too low. The ramp is not high enough. The g.p.e. of the girl is not zero. The speed of the girl is too great.some energy is wasted
the g.p.e of the girl is not zero - 12Explain how lubricating the wheels of a skateboard can increase the speed of the rider. (3)reduces the amount of friction
so more energy is usefully transferred
greater kinetic energy - 13Some ceiling lights in the home are connected to the mains by a two-core cable. Why do some ceiling lights not have an earth wire.(casing is) not made of metal
little / no chance of electric shock
- 14What is the equation that links charge flow, current and time.charge flow = current × time
- 15Describe how the movement of copper particles in wire changes when copper melts.the particles vibrate about a fixed position regular arrangement
(the particles change) to being free to move around - 16Radioactive nuclei can emit alpha, beta or gamma radiation. Which type of radiation is the most penetrating? Alpha (α) Beta (β) Gamma (γ)gamma
- 17Which type of radiation is the most ionising? Alpha (α) Beta (β) Gamma (γ)alpha
- 18Which type of radiation has the longest range in air? Alpha (α) Beta (β) Gamma (γ)gamma
- 19atom, electron, neutron, orbit, proton, nucleuselectron atom
nucleus orbit
- 20Explain why the total positive charge in every atom of an element is always the same. (2)positive charge is provided by protons
(every atom of the same element contain the) same number of protons - 21The results from the alpha particle scattering experiment led to the nuclear model. Alpha particles were fired at a thin film of gold at a speed of 7% of the speed of light. Determine the speed of the alpha particles. Speed of light = 300 000 000 m/sv=30000000× 7 / 100
v = 21 000 000 (m/s)
21 000 000 - 22A student wanted to determine the density of the irregular shaped object shown. What experiment would allow the student to determine the density of the object. (6)• measure mass
• use a top pan balance or scales
• part fill a measuring cylinder with water
• measure initial volume
• place object in water
• measure final volume
• volume of object = final volume − initial volume
• fill a displacement / eureka can with water
• water level with spout
• place object in water
• collect displaced water
• measuring cylinder used to determine volume of displaced water
• useof: mass density = volume
- 23A student is given a piece of plastic material. He determined the density of the material three times. Determine the uncertainty in the student’s results.(1120 - 960) / 2
= 80 (kg/m3)
80
Informationen
- Beschreibung
- COMBINED SCIENCE: TRILOGY - Paper 1F Wednesday 23 May 2018
- Erstellt von
- Seth Bailey
- Aufrufe
- 23
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