Answer:
<h2>Focal length</h2>
Explanation:
The Focal length of a lens is the distance from the center of the lens to
its principal focus.
A)float
D)<span>density is greater than the weight of the object
</span>
Answer: A) 2 B) 4 C) 1
Explanation:
The Electric field from a parallel-plate capacitor is given by:
A) E=Q/(L^2 * ε0) so if we put a charge double the final electric field is double that the original.
B) from the above expression for the electric field, If the size of the plate is double, then the E final is four times weaker that the original.
C) If the distante between plates is doubled the final electric field is the same that initial.
Answer:
0.04895m
Explanation:
Given magnetic field , Length of wire , current and , the diameter, of the coil is calculated as:
Hence, the diameter of the coil is 0.04895m
Answer:
2.538 liters of mercury inside each flask
Explanation:
Let the mercury density be 13593 kg per cubic meters. The volume of the mercury contained in flasks that weight 34.5 kg each would be its mass divided by the density
V = 34.5 / 13593 = 0.002538 cubic meter or 2.538 liters