Question

verify 2/3 + (4/5+(-5/2)) =(2/3 + 4/5) +(-5/6

answer the correct i will mark as brainliest ​

Answer 1

Answer:

Tricky Science Questions

Why is the sky blue?

Why does the moon appear in the daytime?

How much does the sky weigh?

How much does the Earth weigh?

How do airplanes stay in the air?

Why is water wet?

What makes a rainbow?

Why don't birds get electrocuted when they land on an electric wire?

Answer 2

Answer:

Correct option is

B

25.5 m/sec

Let the acceleration of the car is =a and the distance between A and B is =d

v

2

−u

2

=2ad

Given,

v=30m/s and u=20m/s

2ad=30

2

−20

2

ad=

2

(900−400)

=250

when the car is at the mid point of AB then let the speed of the car is

v

1

v

1

2

−20

2

=2a(

2

d

)

v

1

2

=ad+400=250+400=650

therefore

v

1

is =25.5m/s