The brakes on your automobile are capable of creating a deceleration of 4.6 m/s^2. if you are going 114 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 79 km/h speed limit? (the answer reveals the futility of braking to keep your high speed from being detected with a radar or laser gun.)

The minimum time to get the car under max. speed limit of 79 km/h is 2.11 seconds.

Explanation:

isolating "t" from this equation:

Where:

a= (negative because is decelerating)

First we must convert velocity from km/h to m/s to be consistent with units.

So;

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.