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4 years ago

Please help I’ll name you brainliest and give five stars please

Physics

1 answer:

OLga [1]4 years ago

7 0

Answer:

i think its 10 or 11 not sure though if its wrong im sorry im trying to help

Explanation:

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John is going to use a rope to pull his sister Laura across the ground in a sled through the snow. The rope makes an angle of 25

Liula [17]

The mass of Laura and the sled combined is 887.5 kg

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3 years ago

1. A truck of mass 3120 kg is accelerated from rest to a speed of 22.1 m/s. How much work was done on the truck to achieve that

Goryan [66]

Answer:

.5(3120kg)(22.1m/s)^2 = 7.62x10^5 J

Explanation:

8 0

4 years ago

While driving south on hwy 400, Jim gets stuck travelling at 1.9 m/s behind a slow truck. He finally gets into a passing lane, h

Leni [432]

Final velocity

$vf\approx\text{ 31.99 m/s}$

Data & Formula:

. final velocity: vf = ?

. initial velocity : vi = 1.9 m/s

. acceleration : a = 0.060m/s^2

. distance : d = 8.5 km

$vf\text{ = }\sqrt[]{vi^2+2ad}$

$vf\text{ = }\sqrt[]{1.9^2\text{ + 2 }\cdot\text{ 0.060 }\cdot\text{ 8.5}}$

7 0

2 years ago

Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. A small coil is

Xelga [282]

Answer:

$7.3114*10^{-5}V$

Explanation:

To give a solution to the exercise, it is necessary to consider the concepts related to magnetic flux and Faraday's law of induction. Faraday's law states that the voltage induced in a closed circuit is directly proportional to the speed with which the magnetic flux that crosses any surface with the circuit as an edge changes over time.

It is represented under the equation,

$\epsilon = N \frac{\Delta\Phi}{\Delta t}$

Where,

$\epsilon$ is the induced electromotive force

N = Number of loops

$\Delta t$ = Time

$\Delta\Phi$ = Magnetic Flux

For definition the change in magnetic flux is:

$\Delta \Phi = \Delta B A cos\phi$

Where,

B= Magnetic field

Substituting at the first equation we have

$\epsilon = N \frac{\Delta B A Cos\phi}{\Delta t}$

$\epsilon = N \frac{(B_2-B_1) (\pi r^2) Cos\phi}{\Delta t}$

Our values are given by,

N = 1 turn

$B_2 = 1T$

$B_1 = 0T$

r = 1.6mm

$\phi = 0\°$

$\Delta t = 100ms$

Replacing,

$\epsilon = (1) \frac{(1-0) (\pi (1.6*10^{-3})^2) Cos(0)}{110*10^{-3}}$

$\epsilon = 7.311*10^{-5}V$

<em>Therefore the magnitud of the induced emf around a horizontal circle of tissue is $7.3114*10^{-5}V$ </em>

8 0

4 years ago

Can someone pls help I will mark Brainly and 10+ points

Viefleur [7K]

Don’t quote me on this but I think:
Magnesium: two valence electrons, 2 dots, 2 oxidation #
Sodium: one valence electron, one dot, +1 oxidation
Arsenic: five valence electrons, 5 dots, either -3,+3, or +5
Bromine: 7 valence electrons, 7 dots, either 1-,1*,5+
I hope this helps

6 0

3 years ago

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