3 years ago

Which best describes a graph of voltage over time for DC current?

Physics

1 answer:

lana [24]3 years ago

7 0

Answer:it is straight, horizontal line

Explanation:

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Which item could you use in place of an ammeter to demonstrate that a

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Answer:

the answer is D

Explanation:

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3 years ago

A car is traveling at 70 km/h. It then uniformly decelerates to a complete stop in 12 s. Find its acceleration ( in m/s2 ).

Yakvenalex [24]

Answer:

Acceleration will be $-1.620m/sec^2$

Explanation:

We have given initial speed of the car is 70 km/hr

We know that 1 km = 1000 m

And 1 hour = 3600 sec

So $70km/hr=70\times \frac{1000m}{3600sec}=19.444m/sec$

It is given that car stops in 12 sec

So final speed of the car v = 0 m/sec

Time t = 12 sec

From first equation of motion v = u+at

So $0=19.444+a\times 12$

$a=\frac{-19.444}{12}=-1.620m/sec^2$ ( negative sign indicates that speed of the car will constantly decrease )

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3 years ago

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1. Light Bulb

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5. Resistor

6. Voltmeter

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3 years ago

What are the three psychological processes of memory?

MariettaO [177]

1. Encoding Information
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3 years ago

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What net force would be necessary to cause a block of wood with a mass of 2.5 kg to accelerate at a rate of 3.0 m/s2

charle [14.2K]

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

mass = 2.5 kg

acceleration = 3.0 m/s²

We have

force = 2.5 × 3.0 = 7.5

We have the final answer as

Hope this helps you

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3 years ago