P1 Energy

Question 1

<p>What are the different stores of Energy?</p>

Answer 1

<ul>
<li>Kinetic Store</li>
<li>Gravitational Potential Store</li>
<li>Chemical Store</li>
<li>Elastic Potential Store</li>
<li>Nuclear Store</li>
<li>Internal (Thermal) Store</li>
</ul>

Question 2

<p>What is the <strong>Internal store</strong> of energy in an object?</p>

Answer 2

<p>The <strong>internal store</strong> of energy in an object is the sum of kinetic and potentialenergyof all of the objects particles</p>

Question 3

<p>What is the equation to calculate<strong>kinetic</strong> energy?</p>

Answer 3

<p>E_k=½×m×v²</p>

<p>Kinetic Enegy =½×mass×velocity²</p>

Question 4

<p>What is the equation tocalculate <strong>gravitational potential</strong> energy?</p>

Answer 4

<p>E_G.P.E=m×g×h</p>

<p>change in gravitational potential energy = mass × gravitational field strength × change in height</p>

Question 5

<p>What is the equation tocalculate <strong>elastic potential energy</strong>?</p>

Answer 5

<p>E_e.p.e=½×k×e²</p>

<p>elastic potential energy=½×spring constant×extension²</p>

Question 6

<p>How can energy be transferred?</p>

Answer 6

<p>Energy can be transferred by:</p>

<ul><li>Electrical Work</li><li>Mechanical Work</li><li>Waves</li><li>Heating</li></ul>

Question 7

<p>What is <strong>Workdone</strong>?</p>

Answer 7

<p><strong>Work Done</strong>is the measure of energy transfer when a forcemoves an object through a distance</p>

Question 8

<p>How do you calculate <strong>Mechanical Work Done</strong>?</p>

Answer 8

<p>W= F×d= ΔE</p>

<p>Work Done(J)= Force(N)× Distance(m)= Change in energy</p>

Question 9

<p>How do you calculate <strong>ElectricalWork Done</strong>?</p>

Answer 9

<p>E = V × I × t</p>

<p>Energy(J) = Voltage(V)×Current(A)×time(s)</p>

<p></p>

Question 10

<p>What is<strong>Power</strong>?</p>

Answer 10

<p><strong>Power</strong> is the rate of energy transfer or work done</p>

Question 11

<p>What is<strong>Power</strong>measured in?</p>

Answer 11

<p><strong>Power</strong>is measured in<strong>Watts</strong></p>

Question 12

<p>How do you calculate<strong>Power</strong>?</p>

Answer 12

<p>Power(W) = Work Done(J)÷ Time(s)</p>

<p>Power(W) = energy transferred(J) ÷ time (s)</p>

Question 13

<p>What is <strong>WastedEnergy</strong>?</p>

Answer 13

<p><strong>Wasted Energy</strong>is when enrgy is transferred into unwanted stores of energy</p>

Question 14

<p>What is<strong> Dissipation</strong>?</p>

Answer 14

<p><strong>Dissipation</strong> is when energy spreads out to anything nearby</p>

Question 15

<p>How do youcalculate <strong>Efficiency</strong>?</p>

Answer 15

<p>Efficiency(W)= (useful power output(W)/total power input(W)) x 100</p>

<p><b>or</b></p>

<p>Efficiency(J)= (useful power output(J)/total power input(J)) x 100</p>

Question 16

<p>Which methods can be used to increaseefficiency by reducingunwanted energy transfers?</p>

Answer 16

<p>Some methods to increase efficiency are:</p>

<ul><li>Lubrication</li><li>Thermal Insulation</li></ul>

Question 17

<p>Whatare <b>Energy Resources</b>used for?</p>

Answer 17

<p>An energy resource is used to generate electricity and other useful forms of energy</p>

Question 18

<p>What are the advantages of Fossil Fuels?</p>

Answer 18

<p>Reliable - On-demand Energy</p>

<p></p>

Question 19

<p>What are the disadvantages of Fossil Fuels?</p>

Answer 19

<ul>
<li>Not renewable</li>
<li>Inefficient</li>
<li>Contributes to global warming</li>
</ul>

Question 20

<p>How are Fossil Fuels used to create electricity?</p>

Answer 20

<ol>
<li>The Fossil fuel is burnt which heats water</li>
<li>This creates and turns a turbine</li>
<li>The spinning turbine rotates a coil of wire in a magnetic field</li>
<li>Thisrotates a generator which creates a an electrical current that can be transported to homes</li>
</ol>

Question 21

<p>What are the distadvantages of Geothermal Energy?</p>

Answer 21

<p>Can only be used where there is volcanic activity close to the surface</p>

Question 22

<p>What are the advantages of Geothermal Energy?</p>

Answer 22

<ul>
<li>Renewable</li>
<li>Reliable</li>
</ul>

Question 23

<p>What are the disadvantages with Wind Power?</p>

Answer 23

<ul>
<li>
<p>Unreliable -only produces power when wind blows.</p>

<p>Advantages</p>
</li>
</ul>

Question 24

<p>What are the advantages of wind power?</p>

Answer 24

<ul>
<li>Renewable</li>
</ul>

Question 25

What are the disadvantages with hydroelectric Power (HEP)?

Answer 25

• Hydroelectric dams often change the paths of rivers, which can move people out of houses and harm local wildlife

Question 26

What are the advantages of Hydroelectric Power?

Answer 26

• Renewable
• More reliable than wind and solar Power

Question 27

What are the advantages of Tidal Energy?

Answer 27

• Renewable

Question 28

WHat are the disadvantages of Tidal Energy?

Answer 28

• The creation of tidal turbines can damage fragile ecosystems in estuaries

Question 29

What are the advantages of Nuclear Energy?

Answer 29

• No greenhouse gas emission, so no contribution to global warming
• Reliable, on-demand electricity

Question 30

What are the disadvantages of Nuclear Power?

Answer 30

• Formation of nuclear waste

Question 31

How do you set up the Specific Latent Heat Practical?

Answer 31

Question 32

What is the Method to calculate the Specific Heat Capacity of a Metal?

Answer 32

1. Measure and Record the mass of the Metal Black, in kg using a balance
2. Place an immersion heater in the large hole of the block
3. Set up the apparatus and plug in the Joulemeter into the heater
4. Put the thermometer into the smaller hole
5. Measure the thermometer and switch on the stop clock
6. Switch on the 12V power pack
7. Record the reading on the Joulemeter (This shouln't change)
8. Record the temperature every minute for 10 minutes