Momentum has both direction and magnitude.
It is a vector quantity.
Its formula is = Mass * Velocity, Mass you know is associated with size and velocity of course is associated with direction.
C. direction and magnitude
Answer:
(a)
, (b)
, (c) 
Explanation:
The statement is incomplete:
The force on an object is
. For the vector
. Find: (a) The component of
parallel to
, (b) The component of
perpendicular to
, and (c) The work
, done by force
through displacement
.
(a) The component of
parallel to
is determined by the following expression:

Where
is the unit vector of
, which is determined by the following expression:

Where
is the norm of
, whose value can be found by Pythagorean Theorem.
Then, if
and
, then:







(b) Parallel and perpendicular components are orthogonal to each other and the perpendicular component can be found by using the following vectorial subtraction:

Given that
and
, the component of
perpendicular to
is:



(c) The work done by
through displacement
is:



<h2>
Answer: C. Kinetic energy</h2>
Explanation:
Heat is energy in transit, in fact it is a transfer of thermal energy from one body to another.
So, when a metal is heated is because we have two bodies with different temperatures and thermal energy is transferred from one body to another, implying a high speed and kinetic energy in the particles involved (electrons in this case).
This is because the kinetic energy of a particle is that energy it possesses due to its movement, and according to the first principle of thermodynamics, there is a relationship between heat and movement, since the metal is composed of particles that are in motion (to a certain extent).
In this way, with the increase of the temperature of the metal, there is an increase of the kinetic energy of its free electrons with a gain of velocity (movement), therefore a gain in kinetic energy.
The answer is b
300,000 km
The answer is ultraviolet rays