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Consider the following reaction:
P4(s) + 6 H2 (g) ––> 4 PH3 (g)
What mass of P4 will completely react with 2.50 L of hydrogen gas, at 0˚C and 1.50 atm pressure?
Indicate, in the correct order, the layers of TCP/IP protocol stack that are implemented on the following network components :
End system (host)
Router
Switch
Fundamentally, learners develop their reading in the following sequence …
1.
sound sense, picture sense, letter-recognition, word recognition
2.
picture sense, letter-recognition, sound sense, word recognition
3.
sound sense, letter recognition, picture sense, word recognition
4.
letter recognition, sound sense, picture sense, word recognition
Give a practical example of each stage of the diffusion of innovation you will go through in the
process of getting a vaccine.
Using the provided recording and your knowledge from programming 1. Create a program in java that takes in an input from the user and checks whether it’s a number or a word. In case a number is entered the program should print the number to the power 3 and if a word is entered your program should split that word into 2.
1. Find the quadrant in which P(t) lies if sec t > 0 and csc t < 0.
2. Find the values of the 6 trigonometric functions of -7π/3.
3. Find the value of tan 7π/3 .
4. If sin t=√3/2 and cos t<0, find csc t.
5. Find the six trigonometric functions of an angle whose terminal side passes
through (-4,-3).
6. Find the remaining functions given that sin ϴ=513, sec t<0.
7. Find ϴ, if cot 2ϴ= √3, ϴ∈[0°,360°].
8. A ladder leans against the side of a building with its foot ten feet from the building. How far from the ground is the top of the ladder and how long is the ladder if it makes an angle of 60° with the ground?
9. At a certain moment Ship MV Alpha is 7.5 km. west of Ship MV Omega. Ship MV Omega is sailing S 30° 20’ E at the rate of 25 km./hr., while Ship MV Alpha is sailing directly north at rate of 20 km./hr. Find the distance between the two ships and the bearing with Ship MV Omega from Ship MV Alpha after 40 minutes.
For a business and enterprise users, network and data security is of utmost concern. To address this, there are a number of precautions that a WLAN user can adopt to prevent a network from hacker attacks, unauthorised access, and coparate espionage. Discuss various security measures /precautions that can be adopted in preventing these attacks.
A current of 2.0 A is measured when a battery is connected across a resistor, R1 = 10Ω. When the same battery is connected across another resistor, R2 = 6.0Ω resistor, the current changes to 3.0 A.
(a) Calculate the potential differences across each of resistors.
(3 marks)
(b) Find the emf and the internal resistance of the battery.
(9 marks)
(c) Determine the power dissipated in each resistor.
(3 marks)
Boxes of chocolates are produced with a mean weight of 510 g. Quality control checks show that 1 % of boxes are rejected because their weight is less than 485 g.
a Find the standard deviation of the weight of a box of chocolates.
b Hence find the proportion of boxes that weigh more than 525 g.
Encryption to large extent can been adopted to restrict access to data/information only to intended receiver. With the use of well-labeled diagram, discuss various types of encryption and it's operations.
