{"id":77,"date":"2014-10-19T08:11:13","date_gmt":"2014-10-19T08:11:13","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/?page_id=77"},"modified":"2020-02-06T14:41:46","modified_gmt":"2020-02-06T14:41:46","slug":"electricity-energy-exercise-7","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/electricity-energy-exercise-7\/","title":{"rendered":"Electricity & Energy Exercise 7"},"content":{"rendered":"

\"\"<\/a>
\n\"\"<\/a>1. A student makes a statement:<\/p>\n

\u2018The power of a light bulb is 60 W.\u2019<\/p>\n

What does this statement mean, in terms of energy?<\/p>\n

 <\/p>\n

2. Copy and complete this table:
\n\"\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

3. What is the power of a radio that uses up 27 kJ of electrical energy in five minutes?<\/p>\n

4. How much electrical energy is used up by a 725 W fridge in one day?<\/p>\n

5. How long will it take a 1.2 kW vacuum cleaner to use up 720 kJ of electrical energy?<\/p>\n

6. A 42 inch LED television has a power rating of 52 W when it is fully operational. When it is on standby, the television has a power rating of 0.8 W.<\/p>\n

\"\"<\/a><\/p>\n

(a) How much electrical energy will the television use if it is fully operational for 4 hours?<\/p>\n

(b) How much electrical energy will the television use if it is on standby for 10 hours?<\/p>\n

(c) Will the television use up more electrical energy being on standby for two days or being fully operational for 45 minutes?<\/p>\n

7. The power consumption of three game consoles is given in the table.<\/p>\n

\"\"<\/a><\/p>\n

(a) How much electrical energy will a Playstation 3 use up in 60 minutes?<\/p>\n

(b) How long, in hours, will it take an X Box 360 to use up 792 kJ of electrical energy?<\/p>\n

(c) How much less energy does a Nintendo Wii use if it is played for half an hour, compared to an X Box 360?<\/p>\n","protected":false},"excerpt":{"rendered":"

1. A student makes a statement: \u2018The power of a light bulb is 60 W.\u2019 What does this statement mean, in terms of energy?   2. Copy and complete this table:             3. What is the power of a radio that uses up 27 kJ of electrical energy in five … Continue reading Electricity & Energy Exercise 7<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-77","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/pages\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/comments?post=77"}],"version-history":[{"count":12,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/pages\/77\/revisions"}],"predecessor-version":[{"id":214,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/pages\/77\/revisions\/214"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysu2hwrk\/wp-json\/wp\/v2\/media?parent=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}