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Vlad1618 [11]
3 years ago
13

I need help on 54 plz

Physics
2 answers:
Nutka1998 [239]3 years ago
4 0

Acceleration = (change in speed) / (time for the change)

Change in speed = (ending speed) - (starting speed)

Change in speed = (20 m/s) - (10 m/s)  

Change in speed =  10 m/s

Acceleration = (10 m/s) / (5 sec)

Acceleration = <em>2 m/s² forward</em>

dalvyx [7]3 years ago
3 0

Answer:

a = 2 m/s²

Explanation:

average acceleration = change of velocity / change of time

a = Δv/Δt = (20 - 10) / 5 = 10/5 = 2

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Three strings, attached to the sides of a rectangular frame, are tied together by a knot as shown in the figure. The magnitude o
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The magnitude of the tension in the string marked A is 52.5N

Generally, the equation for is mathematically given as

Let's take θ be an angle at A

So, tanθ = 3/8

Let's take α be an angle at B (Below X)

tanα = 5/4

Let's take β be an angle at C (Below x)

tanβ = 1/6

First we take the Horizontal Components

74.9cos(9.46°) = Acos(20.6°) + Bcos(51.3°)

By solving the equation, we get

A = 78.9 - 0.668B … (1)

Now, we take the vertical components

74.9sin(9.46°) + Asin(20.6°) = Bsin(51.3°)

By solving the equation, we get

40.07 = 1.015B

B = 39.5N

By substituting the value of B in equation (1)

A = 78.9 - 0.6668× 39.5

A = 52.5N

Hence, the magnitude of the tension in the string marked A is 52.5N

Learn more about Tension here brainly.com/question/2287912

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8 0
2 years ago
What is the most important mineral​
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Explanation:

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8 0
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PLEASE HELP!!!!
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2 years ago
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a current of 1.80 a flows in a wire. how many electrons are flowing past any point in the wire per second?
liubo4ka [24]

Any point in the wire has 1.12 x 10^{19}. electrons flow per second.

<h3>What causes a current in a wire?</h3>
  • Electric current in a wire, where electrons serve as the charge carriers, is a measurement of the amount of charge that moves through any point of the wire in a given amount of time.
  • A free electron is drawn to a proton to become neutral if an electron is added to the wire.
  • Lack of electrons can result from pushing electrons out of their orbits.
  • Electric current is the name given to the constantly moving electrons in wire.

The current is the quantity of charge Q flowing through a certain point of the wire in a time interval of \Delta t.

I = \frac{Q}{\Delta t}.

by using this relationship

I=1.80 A, we can find the charge passing any point in the wire in 1 second:

Electric Charge, Q = 1.80 C.

To find how many electrons corresponds to this charge, we should divide this value by the charge of a single electron

charge of the electron = 1.6 x 10^{-19} C.

No. of Electrons = Q/q = \frac{1.80}{1.6* 10^{-19}}= 1.12 x 10^{19}.

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