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

<p>What are the disadvantages with hydroelectric Power (HEP)?</p>

Answer 25

<ul>
<li>Hydroelectric dams often change the paths of rivers, which can move people out of houses and harm local wildlife</li>
</ul>

Question 26

<p>What are the advantages of Hydroelectric Power?</p>

Answer 26

<ul>
<li>Renewable</li>
<li>More reliable than wind and solar Power</li>
</ul>

Question 27

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

Answer 27

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

Question 28

<p>WHat are the disadvantages of Tidal Energy?</p>

Answer 28

<ul>
<li>The creation of tidal turbines can damage fragile ecosystems in estuaries</li>
</ul>

Question 29

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

Answer 29

<ul>
<li>No greenhouse gas emission, so no contribution to global warming</li>
<li>Reliable, on-demand electricity</li>
</ul>

Question 30

<p>What are the disadvantages of Nuclear Power?</p>

Answer 30

<ul>
<li>Formation of nuclear waste</li>
</ul>

Question 31

<p>How do you set up the Specific Latent Heat Practical?</p>

Answer 31

Question 32

<p>What is the Method to calculate the Specific Heat Capacity of a Metal?</p>

Answer 32

<ol><li>Measure and Record the mass of the Metal Black, in kg using a balance</li><li>Place an immersion heater in the large hole of the block</li><li>Set up the apparatus and plug in the Joulemeter into the heater</li><li>Put the thermometer into the smaller hole</li><li>Measure the thermometer and switch on the stop clock</li><li>Switch on the 12V power pack</li><li>Record the reading on the Joulemeter<em> (This shouln't change)</em></li><li>Record the temperature every minute for 10 minutes</li></ol>