A2,000-kg car traveling at 40 m/s hits a wall with a force of 40,000 n and comes to a stop. what was the impact time?

The impact time is equal to seconds

Explanation:

Given -

Force (F) N or

Mass(M) Kg

Initial Velocity (u)

Final Velocity (v)

Force exerted by any body is equal to the product of its mass and acceleration

Hence, mathematically it can be represented as

Substituting the given values, we get -

As per Newton's first law of motion,

in case of deceleration

Substituting the available values in above equation, we get -

seconds

The impact time is equal to seconds

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.