A diesel engine uses 6000J of chemical energy and does 2100J of work?

Useful energy out divide by total energy in x 100 So 2100 divided by 6000 = 0.35 0.35 x 100 = 35%

Yasmeen Begum

3.6k students helped

Science Tutor • Secondary • Birmingham

If you wanted to work out the efficiency of the engine you would use Efficiency = (Useful energy output/total energy input)×100. In this case, the useful energy is 2100J since an engine is designed to do work. The total input comes from the chemical energy store of the fuel which is 6000J. The remaining 3900J is wasted as heat, sound etc. So plugging in the values we get E=(2100/6000)×100 E=35%

Awais Naveed

7.4k students helped

Science Tutor • Secondary

What is Q&A on Scoodle?

At Scoodle we understand that everyone learns in a different way. Some people learn through practice, using essays and notes; others prefer video lessons to watch and learn, some just need help with a specifically hard question, while some learn best 1-on-1 tutoring sessions. At Scoodle we cater for all types of learning styles and needs. From GCSE Maths video lessons to A-level English essays and specialist educators in every subject - we’ve got you covered.

Scoodle has helped over 131,000 students so far

5 Science tutors available now

Verified

Bayzid Rahman

Chemistry and Biology graduate| GCSE/A level science specialist|Grade booster

I'm currently a science teacher who is exploring private teaching as a viable method for success in our society. Brief history: Bsc Biological Chemistry, Aston University, 2015 (2.1) PGCE Science, Newman University (2018) Now Education, Science teacher (2017- present) Private Tuutor in GCSE science AND A-LEVEL Biology and Chemistry (2017-present)

Matthew Cotton

Graduate entry medical student with a 1st class Masters and BSc

Six years experience as an A-level Chemistry and Biology tutor. 4th Year Graduate Entry Medical student with an MSc in neuroscience. Previously worked as a pharmaceutical communications consultant, so trained to convey complex topics in manageable ways Also provide GCSE STEM subject tutoring. Experienced agency worker as a medical school entry specialist. Over 50 personal statements edited previously Average student gains 1.5 grades at A-level over 3 months. Happy to discuss plans of action and session arrangements. Love helping people achieve there best! Student testimonials: “Matt is an amazing tutor, he really makes the hardest topics accessible. I really feel like I’ve got a good chance of getting the grades now.” Sally S. - medical school applicant “After our sessions my teachers have noticed a big difference, I’ve even won certificates for being able to teach the class a new topic!” Monika O. - GCSE stem student

Karen Neish

Online lessons

Let’s enjoy learning togeth

I’m a first year student in University if Bristol studying Cellular and molecular medicine. I enjoy Chemistry and Biology!

£15Per hour

210Tutor score

Verified

Vasanthra Naicker

Online lessons

Skilled tutor and undergraduate at University of South Africa

30+ years experience as a teacher of Science/ Chemistry/ Physics Focus on content with application of exam- style questions. Students are provided with a wide range of opportunities to apply content to unfamiliar examples. Techniques in how to approach questions are shared with students. Tutoring is based on student’s needs. Strategies are adapted to bring out the best in students. I enjoy an excellent and calm rapport with students which creates an excellent learning environment.

£30Per hour

210Tutor score

Verified