an ampere is the si unit of which of the following? electric power, electric current, resistance, electric potential difference

1 answer:

Ivan3 years ago

3 0

The Ampere is the SI unit of electric current. This unit is often shortened to "amp" and is abbreviated "A" when placed at the end of a measurement. The name Ampere comes from André-Marie Ampère, and is equal to the flow of one coulomb per second.

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A car is traveling at vx = 30 m/s . The driver applies the brakes and the car decelerates at ax = -5.0 m/s2 . What is the stoppi

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Answer:

90 m

Explanation:

We use an ecuation of uniformly accelerated motion, which allows us to find the distance traveled by the car from the moment that driver applies the brakes until it stops completely, that is, when its final speed is zero.

$v_{f}^2=v_{o}^2+2ad$

We isolate the variable d, knowing that the final speed $v_{f}$ is zero

$d=\frac{-v_{o}^2}{2a}\\d=\frac{-(30m/s)^2}{2(-5m/s^2)}=90 m$

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A wire runs left to right and carries a current in the direction shown. What is the direction of the magnetic field at point Z?

Vanyuwa [196]

The correct option is out of the screen.

As the motion of positive charge is the direction of current in the wire. From the right-hand curl rule, the magnetic field direction will be outside the paper or the screen. As the wire runs left to right and carries a current in the direction from left to right, the magnetic field lines will be outside the screen.

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3 years ago

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Consider another special case in which the inclined plane is vertical (θ=π/2). In this case, for what value of m1 would the acce

Lana71 [14]

Answer:

Explanation:

Consider another special case in which the inclined plane is vertical (θ=π/2). In this case, for what value of m1 would the acceleration of the two blocks be equal to zero

F - Force

T = Tension

m = mass

a = acceleration

g = gravitational force

Let the given Normal on block 2 = N

and $N = m_2 g \cos \theta$