Answer:
Since the astronaut drops the rock, the initial velocity of the rock is 0 m/s
<u>We are given:</u>
initial velocity (u) = 0 m/s
final velocity (v) = v m/s
acceleration (a) = 1.62 m/s/s
height (h) = 1.25 m
<u>Solving for v:</u>
From the third equation of motion:
v²-u² = 2ah
replacing the variables
v² - (0)² =2 (1.62)(1.25)
v² = 1.62 * 2.5
v² = 4 (approx)
v = √4
v = 2 m/s
The speed of the rock just before it lands is 2 m/s
Explanation:
Power=work done/time
=> 12kJ/6s = 12000J/6s = 2000W = 2kW.
hope this helps you
Answer:
C. simple
The term that refers to the fact that an epithelial tissue has only one layer of cells is simple epithelial.
Explanation:
Epithelial tissues are thin tissues that cover all the exposed surfaces of our body.
Based on the number of cell layers, the simplest classification of epithelial tissue is:
a. Simple Epithelial Tissue
When the epithelial tissue consists of a single layer of cells, it is called simple epithelial tissue.
b. Stratified Epithelial Tissue
When there are two or more layers of cells in epithelial tissue, it is called stratified epithelial tissue.
Cuboidal epithelial is also a type of simple epithelial tissue.
Pseudostratified is another type of epithelial tissue which falls in neither simple nor stratified category. They consists of a single layer but the positioning suggests it is stratified.
There are 3 types of epithelial tissues based on their shape:
a. Squamos epithelial tissue
b. Cuboidal epithelial tissue
c. Columnar epithelial tissue
