Answer:
Explanation:
In a steady-state condition, the total volume exiting matches the total volume entering, and
the total amount of salt entering equals the total amount of salt exiting.
The volume entering each minute is = 2000 + 2 x 10³ x 60
= 122000 L.
The total salt entering per minute = 1200 x 2000 + 20 x 2 x 10³ x 60
= 2400000 + 2400000 mg
= 4800000 mg.
The volume of water exiting each minute = 122000 L.
The total salt exiting each minute = 4800000 mg.
The concentration of salt in the exiting water = 4800000 / 122000
= 39.344 mg / L.
Answer:
In a workshop, there is a risk of eye injury from dust, dirt, or metal shavings.
Explanation:
Answer:
Below is the code provided in Python.
# Code Block 1
count = 0 # variable for counting
total = 0 # variable for total
enter = '' # variable for input
while enter!= 'stop':
enter = input('Enter a grade:' )
if enter!= 'stop' and enter.isdigit():
total += int(enter) # adding to the total amount
count += 1 # then adding to the count
print float(total) / count
# Code Block 2
numbers = []
while enter!= 'stop':
enter = input('Enter a grade:' )
if enter!= 'stop':
numbers.append(int(enter))
print sum(numbers) / float(len(numbers))
