Arace car travels 40 m/s around a banked (45° with the horizontal) circular (radius = 0.20 km) track. what is the magnitude of the resultant force on the 80-kg driver of this car? o a. 0.72 kn o b.0.68 kn o c. 0.64 kn o d.0.76 kn o e. 0.52 kn

c)

Explanation:

As we know that resultant force is the net force that is acting on the system

As per Newton's II law we know that net force is product of mass and acceleration

so we will have

here we know

m = 80 kg

for circular motion acceleration is given as

now we have

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid