Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. WAEC
  4. /
  5. Physics
  6. /
  7. 1990
  8. /
  9. Q19
Question 19

How much heat is given out when a piece of iron of mass 50g and specific heat capacity 460 Jkg-1k-1 cools from 85oC to 25oC?

  • A.1.38 x 106 J
  • B.2.53x104J
  • C.7.66x103J
  • D.1.38x103J
  • E.1.27 X103J
Objective

Question details

Exam body
WAEC
Subject
Physics
Year
1990
Question no.
#19
Type
Objective
Previous · Q18lf the temperature of a small quantity of water in a closed container is… Next · Q20 Heat transfer by convection in a liquid is due to the

More from this paper

  • Q15A cube made of a metal of linear expansivity is warmed through a temperature of…
  • Q16Dry hydrogen is trapped by pellet of mercury in a uniform capillary tube closed…
  • Q17Two solids P and Q of equal mass are heated to the same temperature and dropped…
  • Q21Which of the following is not a suitable method for reducing loss of heat from a…
  • Q22When the direction of vibration of the particles of a medium is perpendicular to…
  • Q23A bat emits a sound wave at a speed of 1650.0ms -1 and receives the echoes 0.15s…
See all Physics 1990 questions
Teacha

Africa's learning & exam readiness platform. Built for students, tutors, and schools.

Platform

  • Courses
  • Mock Exams
  • Past Questions

For You

  • I'm a Tutor
  • I'm a School
  • Pricing

© 2025 Teacha. Built for African learners, tutors, and schools. Teacha is not affiliated with WAEC, NECO, or JAMB. All past questions are sourced from publicly available materials.

Privacy PolicyTerms of UseCookie Policy