Classify each substance as either a conductor or insulator.

A sample of mercury:
✔ conductor

A piece of glass:
✔ insulator

A rubber hose:
✔ insulator

A negatively ionized lithium paste:
✔ conductor

Answer:

A!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:

I. increase the force that the engine provides.

II. decrease the mass of the car

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

[tex] Acceleration = \frac {Force}{mass} [/tex]

In this scenario, a car manufacturer wants to change its car’s design to increase the car’s acceleration. Thus, the changes the engineers should consider making to the design is to increase the force that the engine provides and decrease the mass of the car.

Answers:

Answer:

Workdone = 6000Nm

Explanation:

Given the following data;

Mass = 5kg

Force = 500N

Distance = 12m

To find the work done;

Workdone = force * distance

Workdone = 500 * 12

Workdone = 6000Nm

Answer: A driver must not drive a vehicle at such a slow speed ... When driving under adverse weather, road or traffic ... before the school bus stops to pick up or let off students

Explanation:

hope this helps :)

Answer:

Trabajo realizado = 600 Nm

Explanation:

Dados los siguientes datos;

Fuerza = 200 Newton

Distancia = 3 metros

Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia

Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3

Trabajo realizado = 600 Nm

Answer:

Force = -10 Newton.

Explanation:

Given the following data;

Initial velocity = 8.5m/s

Final velocity = 7.5m/s

Time = 0.25 seconds

Mass = 2.5kg

To find the force exerted;

First of all, we would determine the acceleration of the ball;

Acceleration = (v - u)/t

Acceleration =(7.5 - 8.5)/0.25

Acceleration = -1/0.25

Acceleration = -4 m/s²

Now, to find the force exerted;

Force = mass * acceleration

Force = 2.5 * -4

Force = -10 Newton

Note: The force is negative because it is an opposite reaction.

The phenomenon of interference occurs when two wave pulses are traveling along a string toward each other. Option D is correct.

The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.

The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.

When two wave pulses are traveling along a string toward each other. They meet and the phenomenon is occur known as interference.

Hence the phenomenon of interference occurs when two wave pulses are traveling along a string toward each other.

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Answer:

3.8 × 108 m

Explanation:

Use formula: v^2 = G x m central / r

G = 6.77 e-11

Also, it was right on Edge.

Good luck!

The distance between Earth and its moon is 3.8×10⁸ m.

A force that causes a body to follow a curved path is known as a centripetal force. It always moves in a direction that is the opposite of the body's velocity and in the direction of the immediate center of curvature of the path.

It is "a force by which bodies are dragged or driven, or in any manner tend, towards a point as to a center," according to Isaac Newton.

Given parameters:

Mass of the Earth: M = 6.0 × 10²⁴ kg.

Mass of the moon: m = 7.3 × 10²² kg.

Moon's tangential speed: v = 1,025 m/s

Let the distance between the center of Earth and the moon is r.

Hence,

GMm/r² = mv²/r

r = GM/v²

= 6.7 × 10 ⁻¹¹ × 6.0 × 10²⁴ / (1,025)²

= 3.82×10⁸ m.

Hence, by subtracting Earth's radius = 6.4 x 10⁶ m, we get, the distance between Earth and its moon is 3.8×10⁸ m.

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Answer:

very smooth and polished glass mirror

Explanation:

The best type of mirror for this would be a very smooth and polished glass mirror. A metal mirror will also work but it would need to be extremely polished. This would allow light to efficiently be reflected across the room, thus effectively adding an "extra" light source to the room. If the mirror is not smooth then the light may become distorted and not reflect properly as it is supposed to. This may defeat the entire purpose of the mirror for this scenario.

The rare disorder that includes the inability to feel pain is called Congenital analgesia. That is option B.

Congenital analgesia is defined as ,the name implies, a genetic disorder that rarely occurs which makes one not to be able to feel pain.

It is an autosomal recessive disorder in which there is genetic changes in the PMRD12 gene.

Therefore, the rare disorder that includes the inability to feel pain is called Congenital analgesia.

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Answer:

option f) all of the above

We will see that all of the given options would increase the momentum, so the correct option is f "all of the above"

Momentum is defined as the amount of motion, and it is given by:

P = m*v

Where m is the mass of the object and v is the velocity.

We can't change the mass of the golf ball, but we can change the velocity, and to do it, we need to increase the acceleration that we apply to the ball.

To increase the acceleration we can:

Then all the options are correct, which means that the correct option is f.

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Answer:

0.2 I took the test

Explanation:

I took the test

The time period of the whole wave cycle is 6 seconds but the time period of one complete wave is about 4 seconds here. The inverse of this time period is the frequency, that is 0.2 Hz.

Frequency by definition is the number of events per unit time. Frequency of a wave is the number of wave cycles in one second. It is the inverse of the time period.

Frequency is directly related to the energy of the wave. As the frequency increases, energy of the wave also increases. In the given graph the wave cycle is given for a time of 6 seconds.

The time period for one complete wave  is 4 second from the graph.

thus, T = 4 s

v =  1/T

  = 1/4 = 0.2 s⁻¹ or 0.2 Hz  

Therefore, the frequency of the wave shown, is 0.2 Hz.

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Answer:

power=44.1 watts

Hope it helped

PLS mark BRAINLIEST

Answer:

i do not know man

Explanation:

lol

The angular acceleration of the washing machine spin is 53.5 x 10⁻³.

Angular acceleration is defined as the time rate of change of angular velocity in a circular motion.

Here,

Initial angular velocity, ω₁ = 20 rad/s

Final angular velocity, ω₂ = 8 rad/s

Angular displacement, θ = 2[tex]\pi[/tex] x no. of revolutions

θ = 2[tex]\pi[/tex] x 500 = 1000[tex]\pi[/tex]

a) Using the equation of circular motion,

ω₂² - ω₁² = 2αθ

Therefore, the angular acceleration,

α = (ω₂² - ω₁²)/2θ

α = (20² - 8²)/2 x 1000[tex]\pi[/tex]

α = 53.5 x 10⁻³ rad/s²

b) Time taken by the machine spin to slow down,

t = (ω₂ - ω₁)/α

t = (20 - 8)/53.5 x 10⁻³

t = 224.2 s

Hence,

a) The angular acceleration of the washing machine spin is 53.5 x 10⁻³.

b) Time taken by the washing machine spin to slow down is 224.2 s.

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Answer: Friction

Explanation:

Friction and the normal force would be the two initial forces to overcome.

Answer: Friction

Explanation: The object must be pushed along which will create friction which nmust be overcome.

Answer:

Vibrates 5 times  a / every second

Explanation:

Answer:

Because they travel by interacting within other particles.  

Explanation:

Sound cannot travel in a vacuum, sound waves need to interact with other particles in order to be carried and this makes sound waves a mechanical wave.

Answer:

It counts as a learning experience

Explanation:

He can learn from his mistakes and take important steps to achieve his goal In the future.

Setting objectives can lead to better direction, enhanced attention, higher levels of motivation, and increased productivity. You may change your behaviours, mindset, confidence, and daily activities by setting clear, measurable goals.

More essential than monetary or material rewards is achievement. Greater personal satisfaction comes from completing the task or reaching the goal than from being praised or recognized.

Additionally, crucial is commitment. It is less probable that you will succeed if you don't give your aim your all. This enables you to change your future expectations and strategy.Feedback enables you to discover your strengths and weaknesses.

Therefore, people who are driven by achievement are always looking for methods to do things better.

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Answer:

myself tbh

Explanation:

hope this helps

Answer: Depression and myself, love life

Explanation:

Answer:

Carbon Dioxide and Water.

Explanation:

This is the chemical formula for photosynthesis!

Answer:

b) Quartz Clock

Explanation:

It's is a very type of clock which uses the vibration of quartz crystals to measure time accurately

Answer:

I started answering this before everything was erases, but briefly

W = 1/2 K x^2     so K = 2 W / x^2 = 6 * 25 = 150

Also F = - K X = 150 * 1/5 = 30 N at max extension

m = F / a = 30 /15 = 2 kg

Since max extension occurs at t = 0 you can write

x = A sin ω t

v = ω A cos ω t

a = -ω^2 A sin ω t            note that there is no phase angle here

Also at .1 compression

.1 = .2 sin ω t     and sin ω t = 1/2    and ω t = 30 deg = pi / 6

Substiture these values above to get velocity and acceleration when

ω t = 30 deg

Answer:

27.5

Explanation:

KE=1/2m(v)^2

Answer:

Explanation: A charged body loses its charge when we touch it with our hand because some of the charge flows through our body to the ground earthing. As a result the charge on the body decreases every time we touch it. This is because of earthing.

Explanation:

yw .

Explanation:

When we touch a charged body, it loses its charge, due to the process of earthing. Our body is a good conductor of electricity. It transfers the charges to the earth

Answer: 21.9 mm

Explanation:

Given that five independent measurements are made of the diameter of a cylinder. Results, in mm, are: 21.8; 21.6; 22.1; 21.9; 22.1. What should be the reported value of the cylinder's diameter?

The measurement of the diameter of cylinder is measured several time in order to reduce the uncertainty called random error.

The reported value of the cylinder's diameter should be the average or the mean value of the whole measurement.

That is

Mean = (21.8 + 21.6 + 22.1 + 21.9 + 22.1) ÷ 5

Mean = 109.5 ÷ 5

Mean = 21.9 mm

Therefore, the reported value of the cylinder diameter will be 21.9 mm

Answer:

58.8 N

Explanation:

The normal force is calculated as equal to the perpendicular component of the gravitational force.

Thus; N = mg

We are given m = 6 kg

Thus;

N = 6 × 9.8

N = 58.8 N

Thus, magnitude of normal force on the rock = 58.8 N