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3 years ago

11

Explain how magnetic forces enable a maglev train to float above the tracks.

2 answers:

Drupady [299]3 years ago

7 0

That's what google says, but yeah lol, your right

Vsevolod [243]3 years ago

5 0

Explanation:

Two sets of magnetic forces enable Maglev train to work. We know that like poles repel each other and unlike poles attract each other. The repulsion between one set of magnets lifts the train up from the tracks. The train floats or we can say levitates above the track. Another set of magnetic forces makes it move forward.

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A hot air balloon of total mass M (including passengers and luggage) is moving with a downward acceleration of magnitude a. As i

frez [133]

Answer:

When balloon moves in the downward direction two forces acts on it.

i) Force exerted by air in the upward direction

ii) Weight

According to newton’s second law of motion:

Sum of forces = Ma

W – F = Ma

Mg – F = Ma …….. (i)

when some of the mass m is dropped and balloon is moving in upward direction with acceleration a/2 then,

F – W = (M-m)a/2

F – (M-m)g = (M-m)a/2

F – Mg + mg = Ma/2 – ma/2 ….. (ii)

Adding equation (i) and (ii)

mg = M(3a/2) – ma/2

m(g + a/2) = M(3a/2)

m = M(3a/2)/(g + a/2)

5 0

3 years ago

Which of the following terms is the best described as the number of waves that pass a point in one second

sammy [17]

Thinking it would be Wave frequency 1 wave per second =1 Hertz

3 0

3 years ago

Add the following and give the answer using significant figures 5000+621

Alexxx [7]

Answer:

;) hope it's helpful

Explanation:

5000 + 621 = 5621

Facts about 5621

Sig Figs

4

5621

Decimals

0

Scientific Notation

5.621 × 103

E-Notation

5.621e+3

Words

five thousand six hundred twenty-one

8 0

3 years ago

Anyone can help?? I need it done before 9am please!!

Delicious77 [7]

Answer:

The answer is below

Explanation:

The equation for a linear line graph is given by:

y = mx + b, where y and x are variables, m is the slope of the graph and b is the y intercept (that is value of y when x is zero).

The slope (m) of a line passing through two points $(x_1,y_1)\ and\ (x_2,y_2)$ is given by:

$m=\frac{y_2-y_1}{x_2-x_1}$

A) The first line passes through the point (0, 0) and (10, 60). It is represented as (time, velocity). Hence the slope is:

$m=\frac{60 -0}{10-0}=6\ m/min^2$

B) The second line passes through the point (10, 60) and (15, 60). Hence the slope is:

$m=\frac{60 -60}{15-10}=0\ m/min^2$

C) The third line passes through the point (15, 60) and (40, -40). Hence the slope is:

$m=\frac{-40 -60}{40-15}=-4\ m/min^2$

D) The third line passes through the point (40, -40) and (55, 0). Hence the slope is:

$m=\frac{0 -(-40)}{55-40}=2.67\ m/min^2$

6 0

3 years ago

A one-kilogram plate on a shelf has 19.6 J of potential energy. If the plate falls from the shelf, what will its maximum velocit

8_murik_8 [283]

(1/2) m v^2 = 19.6
<span>.5 * 1 * v^2 = 19.6</span>

5 0

3 years ago

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