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earnstyle [38]
4 years ago
8

The energy used by an appliance which operates at 240 volts at 15 amp for 4 hr. is A. 0.92 kwhr. B. 3.45 kwhr. C. 14.4 kwhr. D.

60.0 kwhr
Computers and Technology
1 answer:
Tju [1.3M]4 years ago
8 0

Answer:

C. 14.4 kwhr.

Explanation:

To calculate the energy used by appliance first calculate the power. The formulae for calculating power(<em>P</em>) is P= I \times V, where V stands for voltage and I stands for current.

In the given problem,  V = 240 volts and I = 15 amp. Therefore,

P=240 \times 15 =3600\ watt(w) = 3.6\ kw

Now, formulae for calculating energy used i.e. work(W) is W = P\times t, where <em>t</em> is the time.

In the given question time is 4 hr. Therefore energy used will be,

Energy used (W) = 3.6\times4 =14.4\ kwhr.

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Translate each of these statements into logical expressions using predicates, quantifiers, and logical connectives. a) Something
yKpoI14uk [10]

Answer:

Let P(x) = x is in the correct place

Let Q(x) =  x is in the excellent place

R(x) denotes the tool

Explanation:

a) Something is not in the correct place.

P(x) is that x is in the correct place so negation of ¬P(x) will represent x is not in the correct place. ∃x is an existential quantifier used to represent "for some" and depicts something in the given statement. This statement can be translated into logical expression as follows:

                                                    ∃x¬P(x)

b) All tools are in the correct place and are in excellent condition.

R(x) represents the tool, P(x) represents x is in correct place and Q(x) shows x is in excellent place. ∀ is used to show that "all" tools and ∧ is used here because tools are in correct place AND are in excellent condition so it depicts both P(x) and Q(x). This statement can be translated into logical expression as follows:

                                       ∀ x ( R(x) → (P(x) ∧ Q(x))

c) Everything is in the correct place and in excellent condition.

Here P(x) represents correct place and Q(x) represents excellent condition ∀ represent all and here everything. ∧  means that both the P(x) and Q(x) exist. This statement can be translated into logical expression as follows:

                                              ∀ x (P(x) ∧ Q(x)

7 0
3 years ago
2.
Masja [62]

Answer:

is this a question or not?

6 0
3 years ago
2) A ________ uses electronic memory and has no motors or moving parts. A) mechanical hard drive B) solid-state drive C) Blu-ray
grin007 [14]

Answer:

A.mechanical hard

Explanation:

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Averigua las diferentes intensidades, la potencia total y el gasto en € (de un mes de 30 días con el equipo conectado todo el ti
Naily [24]

<u>Explanation</u>:

<u>Here's what the question entails in clearer detail;</u>

Find out the different intensities, the total power and the cost in € (from a 30-day month with the equipment connected all the time) in the following case: Component Voltage (V) Power (P) CPU 0.95 V 27.97 W RAM 1,257 V 2.96 W Graphics Card 3.28 V 75.3 W HDD 5.02 V 19.3 W Fans 12.02 V 2.48 W Motherboard 3.41 V 18.3 W

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Consider this program segment: int newNum = 0, temp; int num = k; // k is some predefined integer value 0 while (num &gt; 10) {
Doss [256]

Answer:

All of these statements are true.

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Since the while loop is reversing the integer number and leaving the highest order digit in the num and stores the reversed number in the newNum variable.

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and if the value of the num is <=10 the while loop will never run and the value of newNum will be 0.

6 0
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