Answer:
(i) The rotation speed must stay the same.
(ii) The rotation speed must increase.
(iii) The rotation speed must decrease.
Explanation:
According to Equation
10.10, the angular speed must therefore vary as the laser–lens system moves
radially along the disc. In a typical CD player, the constant speed of the surface at
the point of the laser–lens system is 1.3 m/s.
Answer:
None of the options is correct.
Explanation:
One of the simplest statements that you can write in Python is a print statement, which causes a message to be displayed on the screen. For example, the following statement causes the message Python programming is fun! to be displayed:
print 'Python programming is fun!'
Notice that after the word print, the Python programming is fun! was written inside a set of single-quote marks. The quote marks are necessary, but they will not be displayed. They simply mark the beginning and the end of the text that we wish to display.
Here is an example of how you would type this print statement at the interpreter’s
prompt:
>>> print 'Python programming is fun!'
After typing the statement you press the Enter key and the Python interpreter executes the statement, as shown here:
>>> print 'Python programming is fun!'
Python programming is fun!
>>>
Thus, the correct way to write the codes in the question is:
print 'Programming is fun'
print 'Python'
print 'Computer Science'
Answer:
- <em>Their country can support </em><u><em> 128 </em></u><em>unique license plates</em>
Explanation:
Since there is space for<em> 7 digits </em>on each <em>license plate</em>, the first plate starts at <em>0000000 </em>(seven 0).
<em>Binary numbers</em> contain only the digits 0 and 1.
Thus, there are only two possibilities for each digit.
Using the multiplication counting principle, the number of total different binary numbers, with seven digits is 2 multiplied seven times:
- 2 × 2 × 2 × 2 × 2 × 2 × 2 = 2⁷ = 128 ← answer
Answer:
Explanation:
In the newer versions of windows, there are a variety of sign-in methods, these include facial recognition, fingerprint scanner, username & password, or Microsoft email sign in. The choice is yours at the end of the Out-of-box experience which is the entire setup experience that the consumer has when first preparing the new windows installation on the computer that they have. Some of the options may require additional hardware on your PC such as a fingerprint scanner or a webcam for facial recognition.