4. Протягом 10 с автомобіль рухався прямолінійно з прискоренням 0,5 м/с і досяг швидкості 20 м/с. Визначити початкову швидкість руху автомобілю. ​

A. Complete the following sentences with appropriate comparative adjective.

1.How old is your new friend? I don't know‚ but he is not then me.

2. How is your grandfather? He is much now, thank you.

3. Why is the carton

than the suitcase? That's because it contains

books.

4. I want to purchase coffee cups. They look

than mugs.

5. This axe is sharp but the saw is.

6. Summer is always

in Delhi than in Shimla.

7. No one will deny that chocolates are

than biscuits.

8. Neha is than you. That is why she gets

marks than you.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.