Why would a positive current flow from the positive end of a wire towards its negative end?

In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, the current going through th

Stells [14]

ANSWER:

C) as the electrons are pushed more by the battery, they move faster through the circuit

EXPLANATION:

Electrons move very slowly. When we supply voltage the current through a wire moves which causes each electron to move in the direction of the flow of current, the electrons which were in random motions previously now move in one direction which is the direction of current,the more we supply the current the faster electrons will move in the circuit,which will cause the current to increase with increase in voltage.

4 0

4 years ago

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Dennis throws a volleyball up in the air. It reaches its maximum height 1.1\, \text s1.1s1, point, 1, start text, s, end text la

rewona [7]

Answer:

If max height = 1.1 meters, then initial velocity is 3.28 m/s

If max height is 1.1 feet, then the initial velocity is 5.93 ft/s

Explanation:

Recall the formulas for vertical motion under the acceleration of gravity;

for the vertical velocity of the object we have

$v=v_0-g \,t$

for the object's vertical displacement we have

$y-y_0=v_0\,t - \frac{g}{2} \,t^2$

If the maximum height reached by the object is given in meters, we use the value for g in $m/s^2$ which is: $9.8\,\,m/s^2$

If the maximum height of the object is given in feet, we use the value for g in $ft/s^2$ which is : $32\,\,ft/s^2$

Now, when the ball reaches its maximum height, the ball's velocity is zero, so that allows us to solve for the time (t) the process of reaching the max height takes:

$v=v_0-g \,t\\0=v_0-g \,t\\g\,\,t=v_0\\t=\frac{v_0}{g}$

and now we use this to express the maximum height in the second equation we typed:

$y-y_0=v_0\,t - \frac{g}{2} \,t^2\\max\,height=v_0\,(\frac{v_0}{g}) - \frac{g}{2} \,(\frac{v_0}{g})^2\\max\,height= \frac{v_0^2}{2\,g}$

Then if the max height is 1.1 meters, we use the following formula to solve for $v_0$ :

$1.1= \frac{v_0^2}{2\,9.8}\\(9.8)\,(1.1)=v_0^2\\v_0=10.78\\v_0=\sqrt{10.78} \\v_0=3.28\,\,m/s$

If the max height is 1.1 feet, we use the following formula to solve for $v_0$ :

$1.1= \frac{v_0^2}{2\,32}\\(32)\,(1.1)=v_0^2\\v_0=35.2\\v_0=\sqrt{35.2} \\v_0=5.93\,\,ft/s$

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3 years ago

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Suppose that while moving into an apartment you move a refrigerator into place by sliding it across the ﬂoor. The refrigerator w

sweet-ann [11.9K]

Answer:

358 N

Explanation:

$F=\mu N$ where F is the force, $\mu$ is the coefficient of static friction between the ﬂoor and the refrigerator and N is the weight

Normally, N=mg hence $F=\mu mg$ where m is the mass of object and g is the acceleration due to gravity

In this case, N is given as 895 N and the coefﬁcient of static friction between the ﬂoor and the refrigerator is 0.400 hence substituting them in the formula we obtain

$F=\mu N= 0.4\times 895 N= 358 N$

4 0

4 years ago

A grain barge travels on a river from point a to point b loading and unloading grain. the barge travels at a rate of 99 mph rela

NARA [144]

The distance from point a and point is equal for travels going back and forth. They would just differ in time and speed because of the sea's speed that propels the vessel. The solutions as as follows:

Distance upstream = Distance downstream
99(t + 2) = (99 + 1)(t)

Solving for t,
t = 198 hours

That means that the distance is equal to:
Distance = 99 miles/hour * (198 + 2 hours)
Distance = 19,800 miles

6 0

4 years ago

Construct an argument to support the statement "You experience frictional forces when you walk down the hall." Describe what wou

xz_007 [3.2K]

Explanation:

Frictional force is need for walking and to allow motion. Without friction, walking and motion wouldn't be possible.

Frictional force is a force that opposes the direction of the motion of a body.

It is force that opposes motions and it is directed towards the opposite side of motion.

Without the force of friction within our feet and the ground, we will continue to slide indefinitely and not be able to have grip of our motion.

Friction restricts and helps to control motion.

learn more:

Motion and friction brainly.com/question/3017271

#learnwithBrainly

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3 years ago