Answer:
Driving test
Explanation:
Usually according to laws in countries worldwide, to be licenced to drive, one is required to go through a driving school to learn the ethics and rules of driving.
Answer:
Cement is largely made up of calcium oxide. Cement can harden in the gastrointestinal tract and cause obstruction. Inhaling cement dust can cause coughing, wheezing, and difficulty breathing. The best prevention is to avoid or limit contact with cement.
Explanation:
Water supply.
Food production.
Housing and shelter.
Sanitation and waste management.
Energy development.
Transportation.
Answer:
vertical, and directed along an axis of symmetry of the cross-section
Explanation:
Shear is a force in an object is in the form of stress or strain. Shear strain is the ratio of length of deformation (extension) to the perpendicular length in the plane of the force applied. Shear stress, which is the stress that tends to shear a material, is the ratio of shear force applied on a surface to the area of the surface.
The shear formula can be used to determine the maximum shear in an object and is given by; τ =
. It is applicable when the internal shear force is vertical and directed along an axis of symmetry of the cross-section.
Answer:
Percentage of solution=32. 96%
Explanation:
Given that initially tank have 50% solution.It means that amount of solution=0.5 x 2500 =1250 lts
Lets take the amount of solution at time t = A
So




Now by integration

Where C is the constant
Given that at t=0 ,A=1250
So 

When t=20 min

A=837.90
So percentage of solution after 20 min

Percentage of solution=32. 96%