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Snezhnost [94]
3 years ago
13

A transformer is a device that increases or decreases voltage. t/f

Physics
2 answers:
sammy [17]3 years ago
6 0
<span>A transformer is a device that increases or decreases voltage. t/f 

The answer is: True my dude
</span>
Dmitry_Shevchenko [17]3 years ago
5 0

Answer:

True.

Explanation:

A transformer is used either to increase or decrease the voltage.

It has two separate sets of coils of wire. The coils connected to the input voltage are called  primary and the output coils are called  secondary.

If number of windings (or coils) of wire in primary are less than the windings in secondary, it is a step up transformer because output voltage will be more than the input voltage. In this case the output voltage given out by the secondary will be more than the primary.

If the primary coils are more than the secondary, it is called a step down transformer. In this case, secondary voltage (output voltage) will be less than the primary.

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B. Bacteria
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4 years ago
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A car travels 5 km due east, then 10 km due north, and then 5
Rufina [12.5K]

Answer:

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Explanation:

8 0
4 years ago
The total weight of a car with passengers is 30,000N. The area of contact of each of the four tyres with the ground is 0.025m2.
vlabodo [156]

Answer:

<em>The minimum pressure car tire pressure is 300,000 Pa</em>

Explanation:

<u>Pressure</u>

It's a measure of the force exerted by an object per unit surface:

\displaystyle P=\frac{F}{A}

Where F is the force applied on a surface area A.

We are given the total weight of a car with passengers as Ft=30,000 N and we also know the area of contact of each tire with the ground as A=0.025 m^2.

The minimum pressure each tire can have is when the total weight is evenly distributed in all four tires, thus F=Ft/4=7,500 N.

Calculating the pressure:

\displaystyle P=\frac{7,500}{0.025}

P=300,000 Pa

The minimum pressure car tire pressure is 300,000 Pa

7 0
3 years ago
Two objects of different masses accelerate at the same rate. According to Newton’s second law of motion, the more massive obje
babymother [125]

Newton's Second law of motion is

F = m * a   ( force = mass * acceleration).

So if a is constant   then a = F 1 / m1  and  a = F2 / m2  then

F1 /m1 = F2 /  m2 and if  m1 > m2 then

F1 must be greater than F2.

Answer is C.

7 0
3 years ago
Two positive point charges of 12uc and Suc
GarryVolchara [31]

Answer:

54 N

Explanation:

We have two positive charges 12uC and 5 uC ,they are kept at a distance of 10cm.

We have a relation for force between two charges q1,q2 as

F=\frac{kq1q2}{r^{2} }

Value of k is 9*10^9

On substituting the values into the equation we get,

F=\frac{9*10^9*12*5}{10^9*10}\\\\  F=54N

Hence the force between them is 54 N.

7 0
3 years ago
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