Which of the following states of matter is always a good conductor of electricity? solid, liquid, gas, or plasma **:/ Thank you!

Answers

Answer 1

Answer:

Plasma...I believe is always a good conductor of electricity. I was tempted to say a solid, but not all solids are the same in composition and that goes for liquid and gas as well.

Hopefully this helped and good luck.

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An individual with true self knowledge is familiar with

Answers

The best answer for this would be strength and weaknesses. An individual with true self knowledge is familiar with his or her strength and weaknesses. Once an individual know which is his weakness or strength, he or she will be able to decide through which he or she truly desires.

In short @Taskmasters is correct But is is A. For plato

Determine the weight of a 2959.0-kg car that is moving at a speed of 21 m/s. Enter anumerical answer.

Answers

The weight of a 2959.0-kg car that is moving at a speed of 21 m / s would be 28998.2 Newtons, here speed of the car is the redundant value that is not used to calculate the weight of the car.

What is gravity?

It can be defined as the force by which a body attracts another body toward its center as the result of the gravitational pull of one body and another.

As given in the problem, we have to determine the weight of a 2959.0-kg car that is moving at a speed of 21 m / s .

The weight of the car = mass of the car × acceleration due to gravity

= 2959 × 9.8

= 28998.2 Newtons

Thus, the weight of a 2959.0-kg car that is moving at a speed of 21 m / s would be 28998.2 Newtons.

To learn more about gravity here, refer to the link given below ;

brainly.com/question/4014727

#SPJ2

weight=mass*gravity

w=2959.0*10

w=29590N

A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of 8) _______ A) 10 J. B) 500 J. C) 5000 J. D) more than 5000 J. E) 510 J.

Answers

Answer:

C) 5000 J

Explanation:

when diver is at some height , he is having some energy in the form of potential energy. when he dives, his potential energy is converted into kinetic energy . so kinetic energy and potential energy are equal.

Kinetic energy of diver = potential energy of diver

= mgh

= 500 x 10

= 5000 J .

The heat capacity of an object depends in part on its _____. A. mass B. enthalpy C. shape D. potential energy

Answers

The correct answer to the question that is being presented above would be letter A. mass. The heat capacity of an object depends in part on its mass. All the other choices do not fit the description that needs to be answered.

The moon's mass is 7.35 × 1022 kg, and it moves around the earth approximately in a circle or radius 3.82 × 105 km. The time required for one revolution is 27.3 days. Calculate the centripetal force that must act on the moon. How does this compare to the gravitational force that the earth exerts on the moon at that same distance?

Answers

Explanation:

It is given that,

Mass of moon, $m=7.35* 10^(22)\ kg$

Radius of circle, $r=3.82* 10^(5)\ km=3.82* 10^(8)\ m$

The time required for one revolution is 27.3 days, t = 27.3 days

1 day = 86400 seconds

27.3 days = 2358720 seconds

Let v is the speed of moon around the circular path. It is given by :

$v=(2\pi r)/(T)$

$v=(2\pi * 3.82* 10^(8)\ m)/(2358720\ s)$

v = 1017.57 m/s

Let F is the centripetal force acting on the moon. It is given by :

$F=(mv^2)/(r)$

$F=(7.35* 10^(22)\ kg* (1017.57\ m)^2)/(3.82* 10^(8)\ m)$

$F=1.99* 10^(20)\ m/s^2$

So, the centripetal force that must act on the moon is $1.99* 10^(20)\ m/s^2$ . The gravitational force that the earth exerts on the moon at that same distance is also equal to $1.99* 10^(20)\ m/s^2$ . Hence, this is the required solution.

1. When a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy.True or False

2. The outward evidence for this transformation can be seen only in the mechanical motion of the motor.
True or False

3. What is true of the efficiency of this motor?
a. it is more than 100% efficient
b. it is 100% efficient
c. it is less than 100% efficient
d. none of the above

Answers

1.) The statement is true!... heat energy is also generated due to the presence of resistance in motor. Heat generated is given by, H=i²Rt( i = current, R is the resistance of the conductor and t is time). 2.) This statement is false because transformation takes place in electrical motor too due to presence of resistance. 3.) c. it is less than 100% efficient.

Answer:

1. True

2. False

3. c. it is less than 100% efficient

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