the answer is B. a car speeds up as a traffic light turns green

**Answer:**

It take the car to catch up with the truck **111.91 s.**

**Explanation:**

To solve this problem we have to use the formula for <em>uniformly accelerated motion </em>(for the car)<em> </em>and<em> </em>the formula for <em>uniform rectilinear movement </em>(for the truck).

We apply the corresponding formula for each vehicle, so we will have two equations. As the question is **how much time**, time is the unknown variable that we will call <em>t </em>from now on.

<u>Equation for the car is:</u>

<u>Equation for the truck is</u>

We know that t will be the same for the two vehicle on the instant the car catch up the truck.

On the time<em> t </em>the distance <em>x</em> traveled for both cars are the same, so we can equate the two formulas ans isolate t.

Note: all unit of measurement must be the same, for speed, we need to convert 36,3mph to m/s.

36,3mph=162.27m/s we use 162.27m/s in the formulas.

**Answer:**

endothermic reactions

**Explanation:**

An instant cold pack is a device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic reaction.

**Answer:**

n physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion.[1] It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is {\displaystyle {\begin{smallmatrix}{\frac {1}{2}}mv^{2}\end{smallmatrix}}}{\begin{smallmatrix}{\frac {1}{2}}mv^{2}\end{smallmatrix}}. In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

The standard unit of kinetic energy is the joule, while the imperial unit of kinetic energy is the foot-pound.

**Explanation:**