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Strike441 [17]
3 years ago
12

Consider a relation representing the present position of molecules in a closed container. The attributes are the ID for the mole

cule, the X, Y, and Z coordinates of the molecule, and its velocity in the X, Y, and Z dimensions. Refer to the X, Y, and Z coordinates as PX, PY, and PZ respectively, and the X, Y, and Z velocities as VX, VY, and VZ respectively.
a) What functional dependencies do you expect to hold?

b) What are the keys?

c) Other than the keys list three superkeys.

d) Other than the keys how superkeys are there?

Computers and Technology
1 answer:
pshichka [43]3 years ago
8 0

Answer:

See attached picture.

Explanation:

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Find the double word-length 2's complement representation of each of the following decimal numbers:a. 3874
miss Akunina [59]

Answer:

-3874₁₀ = 1111 1111 1111 1111 1111 1111 1101 1110₂

Explanation:

2's complement is a way for us to represent negative numbers in binary.

To get 2's complement:

1. Invert all the bits

2. Add 1 to the inverted bits

Summary: 2's complement = -N = ~N + 1

1. Inverting the number

3874₁₀ = 1111 0010 0010₂

~3874₁₀ = 0000 1101 1101₂

2. Add 1 to your inverted bits

~3874₁₀ + 1 = 0000 1101 1101₂ + 1

= 0000 1101 1110₂

You can pad the most signigicant bits with 1's if you're planning on using more bits.

so,

12 bits                          16 bits

0000 1101 1110₂  = 1111 0000 1101 1110₂

They asked for double word-length (a fancy term for 32-bits), so pad the left-most side with 1s' until you get a total of 32 bits.

           32 bits

= 1111 1111 1111 1111 1111 1111 1101 1110

7 0
3 years ago
¿Por qué es importante aprender a programar?
White raven [17]

Answer:

Es importante aprender a programar, por que es el mismo de que alguen aregle su carro. En estos tiempos, la technolagia se ha convertido en la nueva normal. Va vinir el tiempo quando nosotros necesitamos que arreglar un linia de codigo en nuestras computadoras, y no esta necesario para pagar alguen que ellos lo agan. Como quando necesitas que poner una llanta nueva a tu carro. Tu lo puedes cambiar solo. Entonses como el ejemplo del carro, tu puedes arreglar el linia de codigo en la computadora sin pagar alguen por acerlo.

7 0
2 years ago
(70 points, ip address)If anyone can solve all these questions correctly
Mrac [35]

Answer:

its c

Explanation:

4 0
3 years ago
In the retrieval phase of Godden and Baddeley (1975) study of the encoding specificity principle, participants were asked to sup
kicyunya [14]

Answer:

recall

Explanation:

Based on the scenario being described within the question it can be said that this was a recall measure of memory. In the field of neuroscience, a recall test refers to a type of test in which subjects are shows a certain stimuli and are later asked to remember as many stimuli as they can. Which in the case of the Godden and Baddeley (1975) study the stimuli were a set of words that were shown to the subjects.

5 0
3 years ago
What is your opinion on gaming? do you think it has more positive or negative impacts
joja [24]

Answer:

positive bc you can learn from them wwhat to do what not to do mistakes that you wont make in. real life

4 0
2 years ago
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