Question

a ball is thrown vertically upwards with a velocity of 20m/s from the top of the lower the hight of the point from where the Ball is thrown 25.0m how high Will the Ball rise how long will it be before hit me ground​

Answer 1

Answer:

How did Congress react to the Black Codes of the 1860s?

Congress passed new laws that restricted the rights of African Americans.

Congress asked President Johnson to take control of Reconstruction.

Congress took control of Reconstruction from President Johnson.

Congress supported President Lincoln’s plan for states’ readmittance.

Answer 2

Explanation:

Question : Prove that√5 is irrational.

Answer :

Let us assume that √5 is a rational number.

Sp it t can be expressed in the form p/q where p,q are co-prime integers and q≠0

⇒√5=p/q

On squaring both the sides we get,

⇒5=p²/q²

⇒5q²=p² —————–(i)

p²/5= q²

So 5 divides p

p is a multiple of 5

⇒p=5m

⇒p²=25m² ————-(ii)

From equations (i) and (ii), we get,

5q²=25m²

⇒q²=5m²

⇒q² is a multiple of 5

⇒q is a multiple of 5

Hence, p,q have a common factor 5. This contradicts our assumption that they are co-primes. Therefore, p/q is not a rational number

√5 is an irrational number

Hence proved