It is a safety procedure in industries that lock dangerous machines and ensure that there is no operation until maintenance or repairs have been made.
Answer:
C.
Explanation:
Radiation occurs whithout touching. This specific form of radiation is called thermal radiation.
The pH of the substance is 3.3 which is acidic.
<h3>What is pH?</h3>
The pH of a substance or solution is referred to the degree of acidity or alkalinity of that substance. It is measured on a scale of 0 -14.
Given the concentration of hydrogen ions as 5. 0 × 10–4 moles per liter,we use the formulae
ph = –log[h+]
plugging in thge value of h+ as 5. 0 × 10–4 moles per liter we have:
pH = –log{5. 0 × 10–4 ]
pH=3.3
See here for calculation of pHs: brainly.com/question/26430079
The code that read two numbers from user input, then, print the sum of those numbers are as follows:
x = int(input("write a number: "))
y = int(input("write another number: "))
print(x + y)
<h3 /><h3>Code explanation</h3>
- The first line of code ask the user for a number input. The integer input is stored in a variable x.
- The second line of code ask the user for another number input . The integer input is stored in a variable y.
- Finally, we print the sum of the user's input.
learn more on python code here: brainly.com/question/15183327?referrer=searchResults