Question Continuation
True or False?
Answer:
False
Explanation:
Given
Columns: book_title and year_released
SQL statement: SELECT book_title, year_released FROM books GROUP BY year_released
Expected Result: To select the number of books released each year
Although the GROUP BY used in the SQL statement is meant to group rows with same values into summary rows but it's not user properly because the GROUP BY clause, as used here needs the COUNT aggregate functions to group the result-set by one or more columns.
Answer:
i would go with-B
Explanation:
because Exposure to the elements has resulted in the formation of the blue-green patina
Answer:
Resulting heat generation, Q = 77.638 kcal/h
Given:
Initial heat generation of the sphere, 
Maximum temperature, 
Radius of the sphere, r = 0.1 m
Ambient air temperature, 
= 298 K
Solution:
Now, maximum heat generation, 
is given by:
(1)
where
K = Thermal conductivity of water at 
Now, using eqn (1):
max. heat generation at maintained max. temperature of 360 K is 24924
For excess heat generation, Q:
where
Now, 1 kcal/h = 1.163 W
Therefore,
