Answer:
1.2 × 10^27 neutrons
Explanation:
If one neutron = 1.67 × 10^-27 kg
then in 2kg...the number of neutrons
; 2 ÷ 1.67 × 10^-27
There are.... 1.2 × 10^27 neutrons
The complete statement is
As a solid element melts, the atoms become more separated and they have less attraction for one another.
Let me explain to you how this happens. In solid phase. Its molecules are arranged in a very compact manner that is why it takes a definite shape and volume. When it is heated, the kinetic energy of the molecules increases. This is characterized by more frequent collisions. The rise in temperature causes the molecules to move rapidly by vibrating. When it reaches an amount of energy that causes the solid to change phase, this is called the latent energy. The molecules break their form and move farther away from each other until it resembles that of a liquid melting. At this point, the molecules would have lesser attraction because of the distance between them.
Answer:
Explanation:
Work is the product of force and displacement. Work is positive if force and displacement moves in the same direction. Work is negative if force and displacement moves in opposite direction. Take for example, a load is to move from point A to point B in the forward direction. if you apply force on the load from point A to B work done on the load is positive. If it happens that the force you apply is to the opposite direction, the work done will be negative.
Answer:2.24 m/s
Explanation:
Let the mass of ice skater who is moving is 
mass of stationary skater, 
conserving momentum
=
Answer:
The magnitude of electric field is 
and the direction is inward.
Explanation:
Given that,
Length of rod = 10.0 cm
Charge
Distance D = (34.0-10) cm = 0.24 m
We need to calculate the electric field along the axis
Where, Q = charge
D = distance
Put the value into the formula
Negative sign shows the direction of electric field is inward that means toward the center.
Hence, The magnitude of electric field is and the direction is inward.
