You are driving at 28.0 m/s on i-5 south through the terwilliger curves. you notice a deer jump onto the highway at a location 62.0 m in front of your car. you first react to the event, then slam on your brakes and accelerate at -8.10 m/s2, and ultimately stop just in front of the frozen deer.
what is your reaction time?

Your reaction time is 0.486 s

Explanation:

Hi there!

The equation of velocity of the car is the following:

v = v0 + a · t

Where:

v = velocity at time t.

v0 = initial velocity.

a = acceleration.

t = time.

When the car stops, the velocity is zero. So, let´s find the time it takes the car to stop after pushing the brakes:

v = 0

0 = v0 + a · t

0 = 28.0 m/s - 8.10 m/s² · t

-28.0 m/s / -8.10 m/s² = t

t = 3.46 s

Now let´s calculate the distance traveled by the car during this time using this equation:

x = x0 + v0 · t + 1/2 · a · t²

Where:

x = position of the car at time t.

x0 = initial position.

v0 = initial velocity.

a = acceleration.

t = time.

Let´s consider the origin of the system of reference at the point where you hit the brakes so that x0 = 0.

x = v0 · t + 1/2 · a · t²

x = 28.0 m/s · 3.46 s - 1/2 · 8.10 m/s² · (3.46 s)²

x = 48.4 m

Then, the distance traveled before you hit the brakes is (during the time it takes you to react):

62.0 m - 48.4 m = 13.6 m

At constant velocity, the traveled distance is calculated as follows:

x = v · t

Solving for t:

x/v = t

13.6 m / 28.0 m/s = t

t = 0.486 s

Your reaction time is 0.486 s

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

1. metals

2. metalloids only

3. nonmetals only

4. metals and metalloids

5. metalloids and nonmetals

i just took this assignment so this is correct