Answer:
C
Explanation:
light can travel in a vacuum Anne the sped varies
Answer:
Explanation:
Both the pizza rolls are on two circular paths having different radii because one of them is on the rim and another is near the central axis. Their angular velocity are equal . That means they rotate by same angle in equal period of time. So in Δt they make equal angles at the centre. Hence their angular displacements are equal.
But length of arc made by them in equal interval of time that is Δt are different. Ir is so because their speed are different . Speed v and angular speed ω are related to each other as follows.
v = ω r .
So for objects in motion on circular paths having different radii , v are different even if their ω are same.
length of arc l = v Δt
So length of arc will be proportional to their v which will be proportional to r if their ω are same .
Hence length of arc will be proportional to radius of circular path, ie their distance from the centre .
Answer:
They stay in the area in which they were initially deposited for a relatively long time because they are not free to move about the insulator.
Explanation:
If we place large number of electrons in a small area of an insulating surface then the charges will remain in their place for a longer period of time because the charges do not get a path to flow despite the repulsion between them.
Insulators do not have conducting electrons free to carry the charges apart from each other whereas the metal have a sea of electrons free for the conduction of charges.
The hand saw would involve more work because it takes more time and effort.
Answer:
a steady level climb until he gets to his constant speed
Explanation:
a steady level climb until he gets to his constant speed
