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2 years ago

What must happen to the electric current in power lines before it can safely enter your home?

2 answers:

7 0

Answer: use the step down transformers to reduce these voltages in the power lines before they are supplied to the users.

Explanation:

lozanna [386]2 years ago

5 0

Answer:

It passes through a step-down transformer.

Explanation:

Electric current in power lines must be stepped down before they enter our homes because they carry a very high voltage.

The voltage can destroy appliances that have very low voltage.

In this regard, a step down transformer is used to achieve this effect.
The transformer brings the voltage to a level fit to consumers to use.
When voltage is stepped down, appliances can work perfectly.

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In Florida, most of the rocks that are underground are a type of soft, white rock called limestone. If limestone is underwater f

nadya68 [22]

D. Physical weathering

5 0

3 years ago

Read 2 more answers

A sound wave travels through a column of hydrogen at STP. Assuming a density of rho = 0.0900 kg/m3 and a bulk modulus of β = 1.4

STALIN [3.7K]

Answer:

speed of sound will be 1256 m/sec

Explanation:

We have given density $\rho =0.09kg/m^3$

And bulk modulus $\beta =1.42\times 10^5Pa$

We know that speed of sound in a medium is given by

$v=\sqrt{\frac{\beta }{\rho }}$ , here $\beta$ is bulk modulus and $\rho$ is density

So speed will be $v=\sqrt{\frac{1.42\times 10^5}{0.09 }}=12.56\times 10^2=1256m/sec$

So speed of sound will be 1256 m/sec

4 0

3 years ago

Three resistors, 21 Ω, 58 Ω, and 64 Ω, are connected in series, and a 0.50-A current passes through them. What are (a) the equiv

adoni [48]

<h2>a) Equivalent resistance is 143 Ω</h2><h2>b) Potential difference is 71.5 V</h2>

Explanation:

When resistors are connected in series, effective resistance is given by

$R_{eff}=R_1+R_2+R_3+......$

Here

R₁ = 21Ω

R₂ = 58Ω

R₃ = 64Ω

a) $R_{eff}=R_1+R_2+R_3\\\\R_{eff}=21+58+64\\\\R_{eff}=143\Omega$

Equivalent resistance is 143 Ω

b) We know

Potential difference = Current x Resistance

V = IR

I = 0.5 A

R = 143Ω

Substituting

V = 0.5 x 143 = 71.5 V

Potential difference is 71.5 V

6 0

3 years ago

The electrons involved in the formation of a chemical bond are called

tatiyna

Answer: Valence electrons

Valence electrons are those that are in the outermost or superficial layer of the atom, which means they have the highest energy compared to those of the inner layers.

Because of their position, it is easier for these electrons to interact with other atoms of their own element as well as different elements. This is done through the process of forming bonds when being attracted by other atoms.

7 0

3 years ago

A tourist drops (from rest) a ping pong ball from the top of the tower, which has a height of 324 meters. Assuming no air resist

Elanso [62]

Answer:

8.13secs

Explanation:

From the question weal are given

Height H =324m

Required

time it takes to drop t

Using the equation of motion

H = ut + 1/2gt²

Substitute the given values

324 = 0(t)+1/2(9.8)t²

324 = 1/2(9.8)t²

324 = 4.9t²

t² =324/4.9

t² = 66.12

t = √66.12

t = 8.13secs

Hence the time taken to drop is 8.13secs

4 0

2 years ago