1) A vehicle is traveling at 150 km/h after 3 hours it is traveling 240 km/h. Was the vehicle accelerating or decelerating and at what rate?
(And this is for science not biology)

Accelerating (30km/hr²).

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

Where,

Given the following data;

Initial velocity, u = 150km/h

Final velocity, v = 240km/h

Time, t = 3 hours

Substituting into the equation, we have;

Acceleration, a = 30km/hr²

Therefore, the vehicle is accelerating at the rate of 30km/hr² because its final velocity is greater than its initial velocity.

For deceleration, the final velocity of an object such as a vehicle would be lesser than the initial velocity.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

read more on -

sadness is not good

explanation: