What is 5123436475856907-8

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed ⇒ as it changes into other forms of energy.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e