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zalisa [80]
2 years ago
8

Which of the following statements about iron filings placed upon glass resting on top of a bar magnet is false?

Physics
2 answers:
Umnica [9.8K]2 years ago
7 0

Answer: C.The filings will be clustered more densely where the field is weakest.

Lol this is pretty easy haha im on the same question... Because this is obviously false, where the magnetic field is weakest it wont have clusters of fillings. The fillings would be more scattered around. No duh

leva [86]2 years ago
5 0

The answer would be D. Because the iron fillings are attracted to the magnet underneath the glass.

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Me ajudem, Por favor!!!!!!
zzz [600]

Answer:

a)  a=4\,\frac{m}{s^2}

b)  V(t)=4\,t\,+3

c)  V(1)=7 \,\frac{m}{s} \\

d)  Displacement = 22 m

e)  Average speed = 11 m/s

Explanation:

a)

Notice that the acceleration is the derivative of the velocity function, which in this case, being a straight line is constant everywhere, and which can be calculated as:

slope= \frac{15=3}{3-0} =4\,\frac{m}{s^2}

Therefore,  acceleration is a=4\,\frac{m}{s^2}

b) the functional expression for this line of slope 4 that passes through a y-intercept at (0, 3) is given by:

y=m\,x+b\\V(t)=4\,t\,+3

c) Since we know the general formula for the velocity, now we can estimate it at any value for 't", for example for the requested t = 1 second:

V(t)= 4\,t+3\\V(1)=4\,(1)+3\\V(1)=7 \,\frac{m}{s}

d) The displacement between times t = 1 sec, and t = 3 seconds is given by the area under the velocity curve between these two time values. Since we have a simple trapezoid, we can calculate it directly using geometry and evaluating V(3) (we already know V(1)):

Displacement = \frac{(7+15)\,2}{2} = 22\,\,m

e) Recall that the average of a function between two values is the integral (area under the curve) divided by the length of the interval:

Average velocity = \frac{22}{2} = 11\, \,\frac{m}{s}

3 0
3 years ago
Use the drop-down menus to show the development of the atomic theory from the oldest theory (1) to the most recent theory (5).
lesya692 [45]

Answer:

4

1

3

5

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Explanation:

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6 0
3 years ago
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5. The condition of the road surface affects total stopping distance.<br>A. true<br>B. false​
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Answer:

A true

Explanation:

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Answer:

Really fast, usually would bounce up and down after it falls

Explanation:

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This isn't really detailed, but it gives you an idea:
 
-"I am a gas particle
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I hope this helps :)


4 0
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