Explanation:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in
Answer:
400kj
Explanation:
h =mass × specific heat capacity × change in temperature
= 2×2000×[120-20]
=2×2000×100
=400000j
=400kj
When south poles of the two magnets are brought close together, they will repel.
Thus, the statement is true.
The strength of an electromagnet can be increased by increasing the number of turns on the wire of the coil.
Thus, the second statement is false.
There is no change in ocean water temperature when it is from the ocean surface to a depth of 1 km.
