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3 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]3 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 an adiabatc process, what happens when gases in a system are compressed?

likoan [24]

Answer:work is done, and temperature increases

Explanation:

In an adiabatic process, when gases are compressed, work is done on the liquid and the temperature increases

8 0

4 years ago

Can someone explain it with steps?

Anton [14]

Answer:

Option C is the correct answer

Explanation:

Distance travelled by car during reaction time

$=15\times0.4\\\\=6m$

The car stopped before hitting the animal by $1 m$

Distance travelled during deceleration is $21-6-1=14m$

Hence by $v^2=u^2+2as$

We have

$0^2=15^2+2 \cdot a \cdot 14\\\\a=\frac{-225}{28} \\\\=-8.03m/s^2$

Option C is the correct answer

5 0

3 years ago

Read 2 more answers

What provides the force necessary to start a building or bridge oscillating?

Andrew [12]

Usually, the forces that start the oscillation of buildings are the wind and microearthquakes.

4 0

3 years ago

Calculate the weight of an apple of mass 100grams on Earth

11111nata11111 [884]

Answer:

In physics the standard unit of weight is Newton, and the standard unit of mass is the kilogram. On Earth, a 1 kg object weighs 9.8 N, so to find the weight of an object in N simply multiply the mass by 9.8 N. Or, to find the mass in kg, divide the weight by 9.8 N.

Explanation:

Radhe Radhe❤

8 0

3 years ago

Q1.

Vesnalui [34]

Answer:

P = 450 J

Explanation:

Given that,

Mass of a child, m = 18 kg

The vertical distance from the top to the bottom of the slide is 2.5 metres.

The Gravitational field strength = 10 N/kg

We need to find the decrease in gravitational potential energy of the child sliding from the top to the bottom of the slide.

The formula for the gravitational potential energy is given by :

P = mgh

Substituting all the values,

P = 18 kg × 10 m/s² × 2.5 m

P = 450 J

Hence, the decrease in gravitational potential energy is 450 J.

4 0

3 years ago