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Goryan [66]
3 years ago
14

The number is

Physics
1 answer:
Rudiy273 years ago
8 0

Answer:

3.9056\times 10^6

Explanation:

The number given in standard form is

3905600

The given scientific notation is

3.9056\times 10^7=39056000

The decimal will move seven digits to the right.

There is an extra zero when we expand the given scientific form.

3905600\neq 39056000

The scientific form of the given number is 3.9056\times 10^6.

So, the given scientific notation of the number is wrong.

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People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means th
fiasKO [112]

Answer:

636.619772368 A

Explanation:

\tau = Torque = 1\times 10^{-3}\ N/m

B = Magnetic field of Earth = 5\times 10^{-5}\ T

A = Area

d = Diameter = 20 cm

Current is given by

I=\dfrac{\tau}{BA}\\\Rightarrow I=\dfrac{1\times 10^{-3}}{5\times 10^{-5}\times \dfrac{\pi}{4}\times 0.2^2}\\\Rightarrow I=636.619772368\ A

The current is 636.619772368 A

8 0
3 years ago
A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its<br> speed?
Liula [17]

Answer:

30 mph

Explanation:

8 0
3 years ago
Um avião, após deslocar-se 120 km para nordeste (NE), desloca-se 160 km para sudeste (SE). Sendo um quarto de hora o tempo total
Svetach [21]

Answer:

E) 800 km/h

Explanation:

The computation of the average vector velocity module of the plane, at that time is shown below:

The displacement vector is

d^2 = d1^2 + d2^2

where,

d1 = northeast displacement

d2 = southeast displacement

Now

d^2 = (120)^2 + (160)^2

= 14400 + 2560

= 40000

= √40000

d = 200 km

Now the average velocity is

V = ΔS ÷ Δt

= 200 ÷ 1 ÷ 4

= 200 × 4

=  800 km/h

4 0
3 years ago
What is the shorter electromagnetic wave called? A. more powerful. B. less powerful. C. hotter. D.colder
Natasha2012 [34]
I think the answer would be : A. more powerful

The shorter the electromagnetic wave is, the closer it is to the electromagnetic core, which make it more powerful

hope this helps
7 0
3 years ago
Calculate the velocity of the objects motion represented in the following graph. Show all your work.
Leni [432]

as we know that velocity= displacement/change in time

hence velocity here is= 11-3/12-0

=8/12

=2/3

=0.667m/s

hopefully i am right

6 0
3 years ago
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