3 years ago

15 POINTS!!!!!

Physics

2 answers:

lukranit [14]3 years ago

5 0

I believe it’s A. There are a few benefits to taking vitamins, but they’re not worth the cost.

Alona [7]3 years ago

3 0

Answer:

$^{}$ wer here. Link below!

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bit. $^{}$

Explanation:

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Imagine you derive the following expression by analyzing the physics of a particular system: v2=v20+2ax. The problem requires so

lisabon 2012 [21]

As per kinematics equation we are given that

$v^2 = v_o^2 + 2ax$

now we are given that

a = 2.55 m/s^2

$v_0 = 21.8 m/s$

$v = 0$

now we need to find x

from above equation we have

$0^2 = 21.8^2 + 2(2.55)x$

$0 = 475.24 + 5.1 x$

$x = 93.2 m$

so it will cover a distance of 93.2 m

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4 years ago

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A very long, straight horizontal wire carries a current such that 8.15×1018 electrons per second pass any given point going from

Maksim231197 [3]

Magnetic field 'B' at a distance 'r' from an substantially large conductor carrying current 'i' = (2x10^ -7)('i' ) / r

Magnetic field 'B' beyond the wire= (2x10^ -7)(8.15x10^18x1.6x10^ - 19 ) /0.046 =5.7 x10^ -12 tesla

As electrons move from west to east, the conventional current is from east to west.

By means of Maxwell's right handed corkscrew rule, the way of magnetic field is from south to north.

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3 years ago

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A wildlife researcher is tracking a flock of geese. The geese fly 4.0km due west, then turn toward the north by 40 degrees and f

BaLLatris [955]

Answer:

(a). The distance from the initial position is 6.68 km.

(b). The magnitude of their displacement is 7.05 km.

Explanation:

Given that,

Geese fly 4.0 km due west, then turn to north by 40° and fly another 3.5 km.

(a). We need to calculate the distance from the initial position

Using formula of distance

$D=AB+BC\cos\theta$

Put the value into the formula

$D=4.0+3.5\cos40$

$D=6.68\ km$

(b). We need to calculate the magnitude of their displacement

Using formula of displacement

$AC=\sqrt{CD^2+AD^2}$

$AC=\sqrt{(3.5\sin40)^2+(6.68)^2}$

$AC=7.05\ Km$

Hence, (a). The distance from the initial position is 6.68 km.

(b). The magnitude of their displacement is 7.05 km.

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3 years ago

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Elsa has three metal blocks that look the same.

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Answer:

Aluminium is lightweight

Iron is magnetic

and one is not magnetic

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3 years ago

A small child has a wagon with a mass of 10 kilograms. The child pulls on the wagon with a force of

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$F=ma$
where:
F - force
m - mass
a - acceleration

We transform this formula to get a:
$a= \frac{F}{m}$
$a=\frac{2}{10}\frac{N}{kg}=0.2\frac{m}{s^{2}}$

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3 years ago

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