An object is in motion when its distance from another object is changing.
It is C the rest is lubricant
Answer:
The filament is coiled to give it greater length. If the filament was just a piece of straight wire it would only give out a small amount of light. By curling the wire into a coil, a very long length of wire can be stored in a small space. When electricity flows through the coil it can give out much more light.
Answer:
(a) 1 : 2
(b) same
Explanation:
Let the mass of puck A is m and the mass of puck B is 2 m.
initial speed for both the pucks is same as u and the distance is same for both is s.
let the tension is T for same.
The kinetic energy is given by
(a) As the speed is same, so the kinetic energy depends on the mass.
So, kinetic energy of A : Kinetic energy of B = m : 2m = 1 : 2
(b) A the distance s same so the final velocities are also same.
Answer:
5.72 V
Explanation:
The voltage drop across the vacuum can be found by using the Ohm's law:
V = RI
where
V is the voltage drop
R is the total resistance
I is the current
In this problem, we have
I = 13 A
So, using the equation we can find the voltage drop: