Answer:
9.25 x 10^-4 Nm
Explanation:
number of turns, N = 8 
major axis = 40 cm 
semi major axis, a = 20 cm = 0.2 m 
minor axis = 30 cm 
semi minor axis, b = 15 cm = 0.15 m 
current, i = 6.2 A
Magnetic field, B = 1.98 x 10^-4 T 
Angle between the normal and the magnetic field is 90°. 
Torque is given by 
τ = N i A B SinФ
Where, A be the area of the coil. 
Area of ellipse, A = π ab = 3.14 x 0.20 x 0.15 = 0.0942 m²
τ = 8 x 6.20 x 0.0942 x 1.98 x 10^-4 x Sin 90°
τ = 9.25 x 10^-4 Nm
thus, the torque is 9.25 x 10^-4 Nm.
 
        
             
        
        
        
Answer:
Option E is correct 310N
Explanation:
Given that the force used to push the crate is F = 200N
The force directed 20° below the horizontal 
Mass of crate is m = 25kg
Weight of the crate can be determine using 
W = mg
g is gravitational constant =9.8m/s²
W = 25×9.8
W = 245 N
Check attachment. For free body diagram and better understanding
Using newton second law along the vertical axis since we want to find the normal force
ΣFy = m•ay
ay = 0, since the body is not moving in the vertical or y direction 
N—W—F•Sin20 = 0
N = W+F•Sin20
N = 245+ 200Sin20
N = 245 + 68.4
N = 313.4 N
The normal force is approximately 310 N to the nearest ten
 
        
             
        
        
        
Answer:
choose to spend limited resources to meet their needs
 
        
             
        
        
        
It's called sedimentation. And erosion is when the rock is worn away by the water, and wind and becomes sediment.