1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

For the change in temperature of water we require heat which is given by formula

here we will have

initial temperature = 90 degree C

final temperature = 91 degree C

now we will have

from above equation we will have

now we will have

the higher the current the higher the mag field around it the higher the influence on the compass

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.