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3 years ago

What is the universe expanding into?

Physics

1 answer:

ziro4ka [17]3 years ago

4 0

the universe it's not expanding into anything it is expanding but not expending to become something

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6. You are in an airplane going down a runway currently going 24 m/s and accelerating at 8 m/s?

Allisa [31]

Answer:

The time taken by the airplane to take off, t = 11.46 s

Explanation:

Given data,

The initial velocity of the airplane, u = 24 m/s

The acceleration of the plane, a = 8 m/s

The distance covered until take off, d = 800 m

Using the III equation of motion,

v² = u² +2as

= 24² + 2 x 8 x 800

= 13376

v = 115.65 m/s

Using the first equation of motion,

v = u + at

t = (v-u) / a

= (115.65 - 24) / 8

= 11.46 s

Hence, the time taken by the airplane to take off, t = 11.46 s

4 0

3 years ago

A golfer hits a shot to a green that is elevated 3.20 m above the point where the ball is struck. The ball leaves the club at a

dem82 [27]

Answer:

16.17 m/s

Explanation:

h = 3.2 m

u = 18.1 m/s

Angle of projection, θ = 49°

Let H be the maximum height reached by the ball.

The formula for the maximum height is given by

$H=\frac{u^{2}Sin^{2}\theta }{2g}$

$H=\frac{18.1^{2}\times Sin^{2}49 }{2\times 9.8}=9.52 m$

The vertical distance fall down by the ball, h' H - h = 9.52 - 3.2 = 6.32 m

Let v be the velocity of ball with which it strikes the ground.

Use third equation of motion for vertical direction

$v_{y}^{2}=u_{y}^{2}+2gh'$

here, uy = 0

So,

$v_{y}^{2}=2\times 9.8 \times 6.32$

vy = 11.13 m/s

vx = u Cos 49 = 18.1 x 0.656 = 11.87 m/s

The resultant velocity is given by

$v=\sqrt{v_{x}^{2}+v_{y}^{2}}$

$v=\sqrt{11.87^{2}+11.13^{2}}$

v = 16.27 m/s

7 0

4 years ago

When the temperature of an ideal gas is increased, the pressure also ________

kherson [118]

<h2>Answer: increases </h2><h2 />

Explanation:

The expression for an Ideal Gas is:

$P.V=n.R.T$

Where:

$P$ is the pressure of the gas

$V$ is the volume of the gas

$n$ the number of moles of gas

$R$ is the gas constant

$T$ is the absolute temperature of the gas

As we can see, there is a <u>direct proportional relation between the temperature and the pressure</u>, which means that if the temperature increases the pressure of the gas increases as well.

However, it is important to note this is fulfilled if and only<u> if the volume of the container where the ideal gas is, remains constant.</u>

6 0

3 years ago

An electric field does 2.91 x 10^3 eV of work on a carbon nucleus of charge 9.61 x 10^−19 C. Find the change in the nucleus' ele

dimulka [17.4K]

Define electric potential and electric potential energy.

Describe the relationship between potential difference and electrical potential energy.

Explain electron volt and its usage in submicroscopic process.

Determine electric potential energy given potential difference and amount of charge.

6 0

3 years ago

What type of bones form inside the tendon of a muscle, where it crosses a joint?

Diano4ka-milaya [45]

The answer is C. Sesamoid bones

7 0

3 years ago