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tino4ka555 [31]

2 years ago

13

If a ship is moving forward has positive acceleration what can be said about the velocity of the ship?

1 answer:

ra1l [238]2 years ago

7 0

Increasing

Explanation:

If a ship is moving forward and has a positive acceleration, we can say that the velocity of the ship is increasing.

Velocity is the rate of change of displacement of a body with time.

Acceleration is the rate of change of velocity with time.

Acceleration = $\frac{change in velocity }{time}$

If a ship is moving with positive acceleration, the velocity of the ship is increasing also.

This is because when velocity is increasing, the change will be positive.
From the equation, to have positive velocity, the final velocity must be greater than the initial one.
With this, acceleration will be positive.
So we can say, velocity of the ship is increasing.

learn more:

Acceleration brainly.com/question/3820012

#learnwithBrainly

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2 years ago

a sphere of diameter 6•0cm is moulded into a thin uniform wire of diameter 0•2mm.calculate the length of the wire in metres

Scilla [17]

The length of the wire is 36 m.

<u>Explanation:</u>

Given, Diameter of sphere = 6 cm

We know that, radius can be found by taking the half in the diameter value. So,

$\text { sphere radius, } R=\frac{D}{2}=\frac{6}{2}=3 \mathrm{cm}=3 \times 10^{-2} \mathrm{m}$

Similarly,

$\text { wire radius, } r=\frac{0.2}{2}=0.1 \mathrm{mm}=1 \times 10^{-3} \mathrm{m}$

We know the below formulas,

$\text {volume of sphere}=\frac{4}{3} \times \pi \times R^{3}$

$\text {volume of wire}=\pi \times r^{2} \times l$

When equating both the equations, we can find length of wire as below, where $\pi=\frac{22}{7}$

$\frac{4}{3} \times \pi \times R^{3}=\pi \times r^{2} \times l$

$\frac{4}{3} \times \frac{22}{7} \times\left(3 \times 10^{-2}\right)^{3}=\frac{22}{7} \times\left(1 \times 10^{-3}\right)^{2} \times l$

The $\pi$ value gets cancelled as common on both sides, we get

$\frac{4}{3} \times 27 \times 10^{-6}=10^{-6} \times l$

The $10^{-6}$ value gets cancelled as common on both sides, we get

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2 years ago

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2 years ago

Which describes electricity?

SVETLANKA909090 [29]

Answer:

all of the above

Explanation:

- a build up of electric charge

- the force and motion of electrically charged particles

- an electric current

are three different ways to describe electricity.

So the answer is all of the above.

7 0

2 years ago