Atoy dart gun generates a dart with o.140kg. m/s momentum and a velocity of 4m/s. what is the mass of the dart?

35 kg

Explanation:

The momentum of an object is given by:

where

p is the momentum

m is the mass of the object

v is its velocity

In this problem:

p = 140 kg m/s is the momentum of the dart

v = 4 m/s is its velocity

Solving for v, we find its mass:

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.