Acar accelerates horizontally from rest on a level road at a constant acceleration of down the road, it passes through two photocells ("electric eyes" designated by 1 for the first one and 2 for the second one) that are separated by 20.0 m. the time interval to travel this 20.0-m distance as measured by the electric eyes is 1.40 as.
(a) calculate the speed of the car as it passes each electric eye.
(b) how far is it from the start to the first electric eye

A is 14.2857

B is 20M

Explanation:(A)

the velocity or speed of a car is distance/time=20/1.4=14.2857

(B)

Distance between the two eye is 20m

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

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.