In the survey made by United States
in the year 2009, by age 20, the percentage of youth in US that are engaged in
sexual intercourse is 77%. The percentages in the national level are as follows,
for the twelfth -graders are 49%, 40% of eleventh- graders, 29% of
tenth-graders and for the 9th graders, 21% are sexually active.
These are all according to Eaton and others, 2010.
<span>The term validity indicates the ability of a test to measure what it is actually designed to measure.
</span>The concept of validity was formulated by Kelly in 1927. A test is valid if it measures what it claims to measure (t<span>he quality or state of being valid).</span>
Answer:
The Alps and the Apennine mountains
Explanation:
The Alps (Italian name: <em>Alpi)</em> are located in the north of Italy. The Alps are about 1,200 kilometres long. This is the highest mountain range system lying entirely in Europe. The Apennines (Italian name: <em>Appennini) </em>extend over 2/3 of the peninsula.
Answer: The correct answer is : The deflection angles of the core 0 °, 15 ° and 45 °
Explanation: These angles of deflection of the nucleus serve for a precise directional contol of the air supply or the use of the return air. For floor use, the AL1 model air grilles are the most suitable with FG or FH edges due to strong reinforcement. Dust deposits are easily cleaned by removing the core from its frame. The models that are installed on the roof come with welded cores.
