Can someone help me with this question

Because copper is the second-best electrical conductor, it's cheaper and more plentiful than silver, and it's relatively easy to get it out of the ground, refine it, and form it into wires.

(If the electrical wiring in your house was all silver wire, I guess nothing would ever work, because people would keep stealing your wiring.)

Answer:

right to vote, the right to a fair trial, the right to government services, the right to a public education, and the right to use public facilities.

Answer:

8.803 s

(but this is only if it's a free fall, which we assume since we didn't get the mass of the hulk)

Answer:

32200

6*5370

Explanation:

Answer:

 oil floats in water due to the fact that it is less dense. since the water is more dense, it is basically heavier, and heavier items always sink, while lighter items float, the same can be said about liquids. denser liquids will sink while less dense items will float.

Answer:

A

Explanation: A is a example of Air resistance force, which is a contact force.

Answer:

The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.

Explanation:

The gravitational potential energy is the energy due to the position of a body above the ground.

Kinetic energy is the energy due to the motion of a body.

From the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".

As the ball rolls down the ramp, the potential energy at the height is converted to kinetic energy.

The velocity of the male skater is 2.5 m/s in opposite to the direction of the female skater moving.

According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced. As a result, momentum cannot be gained or lost.

Given parameters:

The mass of the male ice skater is: M = 62 kg.

The mass of the female ice skater is: m = 42 kg.

Initially both of them are in rest.

After they push off each other and move in opposite directions, the female skater moves backwards with a speed of v =3.7 m/s.

Let the speed of the male  ice skater is V m/s now.

From  the law of conservation of momentum:

MV + mv = 0

V = - mv/M

= - (42×3.7)/62 m/s

= - 2.5 m/s

Hence, the velocity of the male skater is 2.5 m/s in opposite to the direction of the female skater moving.

Learn more about momentum here:

https://brainly.com/question/29113044

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Answer:

The true statement is;

Neither momentum or kinetic energy is conserved

Explanation:

The question relates to the verification of the conservation of linear momentum, and kinetic energy

The given parameters are;

The mass of each astronaut = 100 kg

From which, we have;

The mass of the moving astronaut, m₁ = 100 kg

The mass of the stationary astronaut, m₂ = 100 kg

The initial velocity of the moving astronaut, v₁ = 5 m/s

The initial velocity of the stationary astronaut, v₂ = 0 m/s

The final velocity of both astronauts, v₃ = 3 m/s

The sum of the initial momentum of both astronauts is given as follows;

[tex]P_{initial}[/tex] = m₁·v₁ + m₂·v₂ = 100 kg × 5 m/s + 100 kg × 0 m/s = 500 kg·m/s

[tex]P_{initial}[/tex] = 500 kg·m/s

The sum of the final momentum of the astronauts is given as follows;

[tex]P_{final}[/tex] = m₁·v₃ + m₂·v₃ = (m₁ + m₂) × v₃ = (100 kg + 100 kg) × 3 m/s = 600 kg·m/s

[tex]P_{final}[/tex] = 600 kg·m/s

∴ [tex]P_{initial}[/tex] = 500 kg·m/s ≠ [tex]P_{final}[/tex] = 600 kg·m/s

[tex]P_{initial}[/tex] < [tex]P_{final}[/tex], therefore, the sum of the linear momentum of both astronauts is not conserved

The sum of the initial kinetic energy of each astronaut is given as follows;

[tex]K.E._{initial}[/tex] = 1/2·m₁·v₁² + 1/2·m₂·v₂² = 1/2 × 100 kg × (5 m/s)² + 1/2 × 100 kg × (0 m/s)² = 1250 Joules

[tex]K.E._{initial}[/tex] = 1250 Joules

The sum of the final kinetic energy of the astronaut is given as follows;

[tex]K.E._{final}[/tex] = 1/2·m₁·v₃² + 1/2·m₂·v₃² = 1/2 × 100 kg × (3 m/s)² + 1/2 × 100 kg × (3 m/s)² = 900 joules

[tex]K.E._{final}[/tex] = 900 joules

[tex]K.E._{initial}[/tex] > [tex]K.E._{final}[/tex], therefore, the kinetic energy is not conserved

From which we get that neither momentum or kinetic energy is conserved.

Answer:

The Right Hand Rule, illustrated at left, simply shows how a current-carrying wire generates a magnetic field. ... The Left Hand Rule shows what happens when an electrical current enters a magnetic field. You need to contort your hand in an unnatural position for this rule, illustrated below

Answer:

D. Solution

Explanation:

Sugar dissolved in water is an example of solution.

A solution is a homogenous mixture of solutes and solvents.

In a solution the solute particles ae distributed uniformly in the solvents. The solute is the substance and it is the sugar here that is dissolved to make a solution.

The solvent is the water in this instance that helps to dissolve the solute.

Answer:

D. Solution

Explanation:

Dissolving sugar in water is an example of a physical change. Here's why:

A chemical change produces new chemical products. In order for sugar in water to be a chemical change, something new would need to result.

Answer:

11 moments docx has the answer

Explanation:

Answer:

40g/mol

Explanation:

The molar mass of a compound is the mass in grams of one mole of the substance.

To find the molar mass of NaOH;

a. Atomic mass of Na = 23g

                              O  = 16g

                               H = 1g

b. So, the NaOH will have a molar mass of:

            23g + 16g + 1g   = 40g/mol

The molar mass of NaOH is   40g/mol

Answer:

c

Explanation:

Answer:

it's d

Explanation:

because if you had energy you could do anything but without energy you won't be able to so anything

hope this helps

Answer:

30J

Explanation:

Given parameters:

Mass of box  = 1.5kg

Height  = 2m

Acceleration due to gravity  = 10N/kg

Unknown:

Change in gravitational potential energy  = ?

Solution:

 The change in gravitational potential energy is given as:

      ΔGPE  = mgh  

m is the mass

g is the acceleration due to gravity

h is the height

   ΔGPE  = 1.5 x 10 x 2  = 30J

Answer:

Explanation:

Force = Mass*Acceleration

Remember this formula because its one of the most used formula in all of physics.

250N = 80kg*Acceleration

a = 3.125 m/s^2

There would definitely be friction because of the water, but since this says high school physics, you prolly can assume it to be negligible

Answer:

Weight (Force) = mass x acceleration due to gravity Weight = 90.0 kg x 9.80 m/s2 Weight = 882 N or 882 kg m/s2 Page 2 Newton's Notes 2 Gravity has an effect on an object in the vertical direction only.

Answer:

882.9N

Explanation:

1kg is 9.81n

Answer:

Motion at one end of the beam results in motion at the other end in the opposite direction.

Explanation:

The location of the fulcrum can magnify (or reduce) the force applied at one end at the expense (or advantage) of the distance over which the other end travels. Sorry if I get this wrong! I am in 5th grade. ♥

Answer:

5 kg

Explanation:

Acceleration = 8 m/s^2

Force = 40 N

Force = mass * acceleration

mass = force / acceleration

mass = 40 / 8

mass = 5 kg

Answer:

1) Energy transfer is the movement of energy from one location to another. ... Energy transformation is when energy changes from one form to another – like in a hydroelectric dam that transforms the kinetic energy of water into electrical energy.

2)A swinging pirate ship ride at a theme park. Kinetic energy is transferred into gravitational potential energy.

A boat being accelerated by the force of the engine. ...

Bringing water to the boil in an electric kettle.

3)Common examples of energy storage are the rechargeable battery, which stores chemical energy readily convertible to electricity to operate a mobile phone, the hydroelectric dam, which stores energy in a reservoir as gravitational potential energy, and ice storage tanks, which store ice frozen by cheaper energy at night 

Explanation:

PLEASE MARK ME AS BRAINLIEST

Answer:

runoff from precipitation

precipitation falls direction into the collection area

Explanation:

i took the test

A collection area gains water as runoff from precipitation or precipitation falling into the collection area.

A collection area is an area set aside for the purpose of collecting water. This water could come into the collection area as precipitation or as surface run off.

Hence, a collection area could gain water via;

Out of the options in the questions, these are two ways in which collection areas can receive water.

Learn more about surface runoff: https://brainly.com/question/998881

Answer:

Fusion or energy because I had that question in my school so I wrote it in my notes book so it fusion or energy I don’t now hop this help you

Explanation:

Answer:

0.84

Explanation:

m = Massa balok

g = Percepatan gravitasi

[tex]\theta[/tex] = Sudut kemiringan

[tex]\mu[/tex] = Koefisien gesekan statik antara balok dan bidang miring

Gaya balok karena beratnya diberikan oleh

[tex]F=mg\sin\theta[/tex]

Gaya gesekan diberikan oleh

[tex]f=\mu mg\cos\theta[/tex]

Kondisi dimana balok mulai bergerak adalah ketika gaya balok akibat beratnya sama dengan gaya gesek pada balok.

[tex]mg\sin\theta=\mu mg\cos\theta\\\Rightarrow \mu=\dfrac{mg\sin\theta}{mg\cos\theta}\\\Rightarrow \mu=\tan\theta\\\Rightarrow \mu=\tan40^{\circ}\\\Rightarrow \mu=0.84[/tex]

Koefisien gesekan statik antara balok dan bidang miring adalah 0.84.

Answer:

30m/s

Explanation:

Given parameters:

Distance  = 12m

Time taken  = 0.4s

Unknown:

Velocity of the tennis ball = ?

Solution:

Velocity of a body is the displacement per unit of time.

  Velocity  = [tex]\frac{displacement}{time}[/tex]  

So;

      Velocity  = [tex]\frac{12}{0.4}[/tex]   = 30m/s

Answer:

-2 m/s

Explanation:

The computation of the acceleration of the block is as follows:

The volume of the block is

V = 1kg ÷ 1,000 kg/m^3 = 1 ÷ 1,000 m^3

Now at the time of submerging in the oil

Net force is

[tex]m_g - F_B = m \times (-a)\\\\m_g - v\times S_{oil} \times g = -ma\\\\a = (\frac{v}{m} \times S_{oil} - 1) g\\\\= (\frac{1}{1000} \times 0.8 \times 1000 -1 ) \times 10\\\\[/tex]

= -2 m/s