Question

a) chemical force
up gravitational pull is called
b) magnetic force
electromagnetic force d) electric force
2 PACKAGE C
1
ution (A) : Machine parts are jammed in winter
The viscosity of lubricant used in machine parts increase at low temperature
(A) and (R) are true and (R) is the correct explanation of (A)
Both (A) and (R) are true but (R) is not the correct explanation of (A)
(A) is true but (R) is false
d) (A) is false but (R) is true
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Answer 1

Answer:

a) magnetic force

I did not understand b)

Explanation: