Answer:
The apparent depth d = 19.8495 cm
Explanation:
The equation for apparent depth can be expressed as:

here;

= refractive index in the first liquid = 1.75
= refractive index in the second liqquid= 1.33
∴



d = 15(1.3233
) cm
d = 19.8495 cm
(a) The time taken for the projectile to reach the maximum height is 32.65 s.
(b) The horizontal range of the projectile is 9,049.1 m.
The given parameters:
- Initial velocity of the projectile, u = 320 m/s
- Angle of projection, = 30 degrees
The time taken for the projectile to reach the maximum height is calculated as follows;

The horizontal range of the projectile is calculated as follows;

Learn more about horizontal range here: brainly.com/question/12870645
Answer:
Metals have more mass per unit of volume than wood.
Explanation:
Density is defined as the amount of matter contained in a unit of volume. A material that is denser than another will therefore have more mass per unit of volume.
The density of a body can affect buoyancy, bodies with low enough densities can float in fluids. For example wood can float in water while metals can't.
A bond with elements from B.