Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

1..focus of a very thin concave lens is 10 cm then its radius of curvature is

a)20 cm
2.80 cal of heat is required to convent 1 gr ice into water then the quantity of heat required to change 10 gr ice into water is
d) 8000cal
3.which pair of chemicals of the following gives common salt
a) nitrogen, chlorine
b) zinc ,hydrogen chloric acid
c)sodium sulphate, barium choloride
d) nitric acid , sodium carbonate
sorry i don't know
ok but thanks fr trying
wait i will try don't worry



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

1)We know that R=2f

R= 2*10=20cm

2)L=Qm= 80*10= 800cal


1 5 1
thank u
Comment has been deleted
Comment has been deleted
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts