Answer:
height of the cliff = 74.529 meters
Explanation:
in this problem we will write projectile motion equations in x and y directions.
writing the equation of motion

where s is the distance traveled in x or y direction, u the initial velocity in x or y direction, t is the time travelled, a is the acceleration along x or y direction.
therefore along y direction
= 0 and
= -9.8 m/
.
therefore along y direction the equation becomes
applying the values 
Answer:
1
Explanation:
because you have to estimate
Desks, chairs, blackboards almost anything in a classroom is a solid mixture so u can list whatever you want. Hope that helped!
Answer:
they are a form of nuclear energy