Answer:
a. The human body has nearly the same density as salt water after exhaling.
b. The human body will always float in the Dead Sea.
Explanation:
According to the concept of floating on the basis of density, any body that is put in a fluid of density greater than its own density will always float due to the force of buoyancy from the liquid.
- The portion of the object submerged while the object is floating depends upon the density of the object as compared to the density of the fluid. This is governed by the equation:

where:
density of the fluid
density of the object
volume of the object submerged in the fluid
total volume of the object
The correct answer is A and C
During a Spring Tide, it will be horizontal, and a Neap tide is vertical
Brainliest plz!
Answer:
The electric field of an infinite line charge with a uniform linear charge density can be obtained by a using Gauss' law. Considering a Gaussian surface in the form of a cylinder at radius r, the electric field has the same magnitude at every point of the cylinder and is directed outward.
Answer:

Explanation:
Magnetic field due to straight long wire is always perpendicular to the line joining the wire and the point
it is given by the equation

now the magnetic field due to 30 A current is given as


Now magnetic field due to other wire having current 40 A is given as


now net field along Y direction is given as


now for X direction magnetic field we know



Now net magnetic field is given as


