Explanation

Optional  اختیاری

Compulsory لازمی

Explanation

Miserliness:  کنجوسی

generosity  سخاوت

Explanation

Explanation

For an angle in the first quadrant the point P has positive x and y coordinates.

Therefore: In Quadrant I, cos(θ) > 0, sin(θ) > 0 and tan(θ) > 0 (All positive). 

Explanation

Explanation

The possible number of subsets of a set with $n$ elements, including the empty set and the universal set, is $2^n$.

Explanation

The job of a pilot is to navigate (a ship or plane);

similarly:

the job of an oarsman is to propel (that is, to power) a boat.

Explanation

alloy, a metallic substance composed of two or more elements as either a compound or a solution

A metal is  a chemical element

so answe "B " is correct

Explanation

When the brakes on a vehicle are applied, the amount of friction between the wheels and the surface it touches is increased.

This helps the vehicle to slow down or stop.

The stopping distance of a vehicle is the sum of the thinking distance and the braking distance.

Explanation

In circular motion, the centripetal force  𝐹 required to keep an object moving in a circular path is given by the formula:

𝐹= 𝑚 𝑣^2/ 𝑟

Where:

m is the mass of the object,

v is the velocity of the object,

r is the radius of the circular path.

If the velocity v is doubled, the centripetal force becomes:

F ′ =  m(2v) ^2/r = 4mv ^2/r =4F

This means that if the velocity is doubled, the force will be four times the original, not twice or half the original.

Therefore, neither of the options provided is correct.