Answer:
magnets are used to attract metal objects.
Explanation:
V=wavelength×frequency
1. wavelength=13/12 km
speed= 18×8 = 144mm/s
Answer:
Chest experiences the friction forces towards right
Explanation:
Friction forces can be defined as a force a body experiences when it is made to slide against the surface. Friction force always acts to stop the the body which is moving. To stop the body, it always acts in the opposite directions to the motion of the body. Therefore, if the treasure chest is dragged across a sandy beach to the left, the frictional forces will act in the right direction.
Answer:
Explanation:
Given
wavelength of emissions are
Energy is given by
where h=Planck's constant
x=velocity of Light
=wavelength of emission
frequency corresponding to this emission
Energy corresponding to 
frequency corresponding to this emission
