Answer:
B. energy
Explanation:
That's my best answer that i have out of the rest.
Answer:
Max height= 36000 meters
Total Time = 120 seconds
Explanation:
0 = U - at
U = at
U= 20*60
U= 1200 m/s
MAX altitude would be
(U²Sin²tita)/2g
Max height= 1200² *( SIN90)²/(2*20)
Time of FLIGHT
2 * 1200/20
2400/20
120 sec
onds
Answer:
The voltage induced in the coil is 1.25 V.
Explanation:
Given;
number of turns, N = 100 turns
cross sectional area of the copper coil, A = 0.1 m²
initial magnetic field, B₁ = 0.5 T
final magnetic field, B₂ = 1.00 T
duration of change in magnetic field, dt = 4 s
The induced emf in the coil is calculated as;
Therefore, the voltage induced in the coil is 1.25 V.
A sphere is a perfect 3 demention closed surface where every point is an equal distance from the center. And a hemisphere is half of a sphere with one flat side.
Given,
The force applied to lift the tree, F=150 N
The work done in lifting the tree, W=250 J
The work done in lifting the tree is the product of the force applied and the height through which the tree was lifted.
Thus,
Where d is the height through which the tree was lifted.
On substituting the known values,
Thus the tree was lifted through a height of 1.67 m