A charge will not experience a force in a magnetic field if it is not moving or if it is moving parallel to the magnetic field. <span>Why </span>aren't all materials magnetic<span>? Most </span>atoms have<span> electrons placed symmetrically so their </span>magnetic<span> fields cancel out.</span>
Answer:
1000 cm.
Explanation:
To obtain the estimated tree height :
(Height of rod / length of rod shadow) = (height of tree / length of tree shadow)
Substituting values into the formula :
(150cm / 120 cm) = (height of tree / 800 cm)
Using cross multiplication :
Height of tree * 120 = 150 * 800
Height of tree = (150 * 800) / 120
Height of tree = 120,000 / 120
Height of tree = 1000
Hence, estimate height of tree = 1000 cm
Answer:
you can't see your back because your neck can only move in fixed direction
