For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement? a. 35° b. 45° c. 75° d. 80° e. 90°

option B. 45°

Explanation:

A body thrown at an angle from horizontal undergoes a projectile motion. The maximum horizontal displacement means the maximum range covered. The range is given by:

where v is the initial velocity, is angle of the projectile and g is the acceleration due to gravity.

For maximum range, sin 2θ = 1

2θ = sin⁻¹ 1 = 90°

θ = 90°/2 = 45°

Thus, the projectile undergoes maximum horizontal displacement at angle of 45°. Correct option is B.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.