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GarryVolchara [31]
3 years ago
15

Which statements best characterize conductors? Check all that apply.

Physics
2 answers:
romanna [79]3 years ago
5 0
It would be the first one and the third one
lidiya [134]3 years ago
5 0

Answer:

Conductors allow electricity to easily move through them.  

Metal is an example of a conductor.  

Explanation:

Conductors are materials that have free electrons, so they allow electrical currents (which are made of electrons traveling) passing through them.

Let's analyze each statement separately:

- Conductors allow electricity to easily move through them.  --> TRUE: conductors allow electrical currents to pass through them.

- Glass is an example of a conductor.  --> FALSE: glass is an example of insulator (insulators are materials that do not allow the flow of current)

- Metal is an example of a conductor.   --> TRUE: metals are generally good conductors of electricity, since they have many free electrons.

- Conductors do not allow electricity to easily move through them.   --> FALSE: it's actually the opposite, conductors allow electricity to easily move through them.

- Conductors restrict the flow of thermal energy. --> FALSE: conductors are generally also good conductors of thermal energy, so they do not restrict the flow of thermal energy.

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Which is the resulting direction of a surface wave
Sliva [168]
In a surface wave (like water) the water goes up and down, but the wave travels across (parallel to) the surface.
3 0
3 years ago
A cannon is fired horizontally at 243 m/s off of a 62 meter tall, shear vertical cliff. How far in meters from the base of the c
Alekssandra [29.7K]

Answer:

865.08 m

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 243 m/s

Height (h) of the cliff = 62 m

Horizontal distance (s) =?

Next, we shall determine the time taken for the cannon to get to the ground. This can be obtained as follow:

Height (h) of the cliff = 62 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h = ½gt²

62 = ½ × 9.8 × t²

62 = 4.9 × t²

Divide both side by 4.9

t² = 62/4.9

Take the square root of both side.

t = √(62/4.9)

t = 3.56 s

Finally, we shall determine the horizontal distance travelled by the cannon ball as shown below:

Initial velocity (u) = 243 m/s

Time (t) = 3.56 s

Horizontal distance (s) =?

s = ut

s = 243 × 3.56 s

s = 865.08 m

Thus, the cannon ball will impact the ground 865.08 m from the base of the cliff.

6 0
3 years ago
A 1000 kg elevator is accelerated upward at a rate of 0.70 m/s2. What is the tension in the cable pulling the elevator upward wh
Masteriza [31]

Answer:

Tension is also known as Force...

and Force is mass× acceleration.

so....1000×0.70=700N

5 0
4 years ago
Read 2 more answers
The force pressing two stacked objects together is equal to the weight of the object on top. The friction between a piece of woo
34kurt

Answer: B. Concrete

Explanation:

Let N = reacting force pressing the bodies in context together (units in Newtons),

The question stated that the force pressing the two mounted/stacked objects together is equal to the weight of the object on top.

We need to start by finding the weight of the piece of wood.

friction is given by

f = μN

The value of f is 22.5,

and from the chart reference the coefficient of friction between wood and stone, μ is 0.30.

22.5 = 75. 0.30

Putting the values into the equation: 22.5 = 0.30N.

Divide both sides by 0.30 to find the value of N:

N= 22.5/0.3 = 75

Now that the piece of wood will be placed on another surface, its weight of 75 Newton is the force pressing the two bodies together.

To determine the new surface, you should find the new coefficient of friction by using the new value of the force of friction given 46.5:

46.5 = µ(75).

Divide both sides by 75 to isolate μ.

The refer chart also indicates that the coefficient of friction equals 0.62 between wood and concrete, so the new surface corresponding to 0.62 is the concrete, which is (B).

3 0
4 years ago
Jesse has 200 peanut butter cups and she gives some of them to her friend. How many peanut butter cups did she give her friend?
pychu [463]

Answer:

99 peanut butter

Explanation:

you minus 200 - 101 you get 99 peanut butter

3 0
3 years ago
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