# Posts by Abubakar

Total # Posts: 10

**math**

The angles of elevation of the highest point of a building from two points S and T are 60° and 30° respectivelly T is vertically above S and |ST| =10m calculete the height of the bulding above the level of S with solution

**permutation**

In how many words can a committee of 5 people be chosen out of 8 people

**Social studies**

workshop

**physics**

A black and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate.if the effort is equal to 60N, determine a. The distance moved by the effort b. The work done by the effort in lifting the load

**Physics**

m1=22kg u1=5m/s m2=500g=0.5kg u2=0m/s v=v1+v2m/s m1u1+m2u2=m1v+m2v m1u1+m2u2=v(m1+m2) 22*5*0.5*0=v(22+0.5) 110=22+0.5v v=110/22.5=4.888888 v=4.9m/s

**physics**

state the laws of refraction of light

**math**

Square root of xandy

**English languege**

What is antonym of sharp

**Physics**

A uniform meter rule of mass 100g balance at a 40cm mark when a mass x is placed at the 10cm mark.What is x?

**education**

how can we avoid indoctrination in teaching.

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