Which type of circuit is becoming more common in residential electrical design and construction? A. Hazardous-area circuit
B. Three-phase circuit
C. 480-volt circuit
D. Communication circuit

Answers

Answer 1

Answer:

Final answer:

The communication or data circuit is becoming increasingly popular in residential electrical design and construction, thanks to the rise of smart homes and home automation systems.

Explanation:

In the realm of residential electrical design and construction, the type of circuit becoming increasingly popular is the D. Communication circuit. This type of circuit, also known as a data circuit, is being more commonly used thanks to the surge in use of smart homes and home automation systems. These systems require a complex network of communication circuits to function, hence their amplified use in recent years.

Contrarily, A. Hazardous-area circuits, B. Three-phase circuits, and C. 480-volt circuits are not typically found in residential properties. They are usually used in commercial or industrial settings where the electrical demand is significantly higher.

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Answer 2

Answer:

Communication circuit (D) is becoming more common in residential electrical design and construction.

LAN Ethernet cables, outlets, and even hubs and bridges, are being built into the walls of new homes, along with the usual electrical outlet wiring, to give the owner the networking infrastructure and internet access that everybody needs now ... without stringing a mess of cables on the floor and through doors all over the house.

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Newton's universal law of gravitation says that every object exerts a force on another object. The shuttle has a gravitational force with Earth, the moon, and whatever planet it is near. This force prevents the shuttle from drifting.Question 1 options:TrueFalse

Select the correct answer.Which statement about forces is true?
A.
Forces are defined by strength but not direction.
B.
Forces are defined by direction but not strength.
C.
Forces are defined by both strength and direction.
OD. Forces act only on objects that are in contact.

Answers

Answer:

Explanation:

Force is a vector quantity. So, it has magnitude and direction which can also be describe as strength and direction

Answer:

Explanation:

Force has both direction and magnitude due to it being a vector quantity. Think of it this way--if I push you, what will happen to you?

Doesn't it depend on 1) how hard I pushed you, and 2) what direction I pushed you? Did I push you towards the wall? Towards a bed? How hard? Hard enough for you to fall?

A car is strapped to a rocket (combined mass = 661 kg), and its kinetic energy is 66,120 J.At this time, the rocket runs out of fuel and turns off, and the car deploys a parachute to slow down, and the parachute performs 36,733 J of work on the car.

What is the final speed of the car after this work is performed?

Answers

Answer:

9.4 m/s

Explanation:

The work-energy theorem states that the work done on an object is equal to the change in kinetic energy of the object.

So we can write:

$W=K_f - K_i$

where in this problem:

W = -36.733 J is the work performed on the car (negative because its direction is opposite to the motion of the car)

$K_i = 66,120 J$ is the initial kinetic energy of the car

$K_f$ is the final kinetic energy

Solving for Kf,

$K_f = W+K_i = -36,733+66,120=29,387 J$

The kinetic energy of the car can be also written as

$K_f = (1)/(2)mv^2$

where:

m = 661 kg is the mass of the car

v is its final speed

Solving, we find

$v=\sqrt{(2K)/(m)}=\sqrt{(2(29,387))/(661)}=9.4 m/s$

When a driver touches a cars steering wheel on a hot day heat is transferred to the drivers hand byRadiation

Conduction

Electromagnetism

Convection

Answers

Answer:

CONDUCTION

Explanation:

When a driver touches a cars steering wheel on a hot day heat is transferred to the drivers hand by conduction

The heat is transferred to the driver's hand by conduction because his hand touched the steering wheel (i.e physical contact involved), the heat is transferred through the driver's hand as against radiation that doesn't require any physical contact.

I hope this helps.

Answer is B. Conduction

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Conduction is a heat it transferred to the heat by touching your hand.

Hope it helped you.

-Charlie

5. Kelvin applied a rightward force of 302 N to a 29 kg desk to accelerate it across the floor. Thecoefficient of friction between the desk and the floor is 0.750.
a. Calculate the Force Friction
FN

Answers

The force of friction is 213.2 N

Explanation:

The frictional force acting on an object sliding on a surface is given by:

$F_f = \mu mg$

where:

$\mu$ is the coefficient of friction

m is the mass of the object

g is the acceleration of gravity

In this problem we have

$\mu=0.750$

m = 29 kg

$g=9.8 m/s^2$

Therefore, the force of friction is

$F_f = (0.750)(29)(9.8)=213.2 N$

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A student is helping her teacher move a 9.5 kg box of books. What net sideways force must she exert on the box to slide it across the floor so that is accelerates at 1.0m/s2?