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3 years ago

Which state of matter has the greatest distance between the individual particles?

Physics

2 answers:

ryzh [129]3 years ago

8 0

your answer is c)steam

Maurinko [17]3 years ago

4 0

Your answer is c steam because steam is a gas...

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A plane traveling 40 m/s drops a box from a height of 186 m. Where does the box strike the ground relative to the point directly

Arte-miy333 [17]

Answer:the horizontal velocity is 40

Explanation:

8 0

2 years ago

The height of a typical playground slide is about 1.8 m and it rises at an angle of 30 ∘ above the horizontal.

Salsk061 [2.6K]

Answer:

$5.94\ \text{m/s}$

$1.7$

$0.577$

Explanation:

g = Acceleration due to gravity = $9.81\ \text{m/s}^2$

$\theta$ = Angle of slope = $30^{\circ}$

v = Velocity of child at the bottom of the slide

$\mu_k$ = Coefficient of kinetic friction

$\mu_s$ = Coefficient of static friction

h = Height of slope = 1.8 m

The energy balance of the system is given by

$mgh=\dfrac{1}{2}mv^2\\\Rightarrow v=\sqrt{2gh}\\\Rightarrow v=\sqrt{2\times 9.81\times 1.8}\\\Rightarrow v=5.94\ \text{m/s}$

The speed of the child at the bottom of the slide is $5.94\ \text{m/s}$

Length of the slide is given by

$l=h\sin\theta\\\Rightarrow l=1.8\sin30^{\circ}\\\Rightarrow l=0.9\ \text{m}$

$v=\dfrac{1}{2}\times5.94\\\Rightarrow v=2.97\ \text{m/s}$

The force energy balance of the system is given by

$mgh=\dfrac{1}{2}mv^2+\mu_kmg\cos\theta l\\\Rightarrow \mu_k=\dfrac{gh-\dfrac{1}{2}v^2}{gl\cos\theta}\\\Rightarrow \mu_k=\dfrac{9.81\times 1.8-\dfrac{1}{2}\times 2.97^2}{9.81\times 0.9\cos30^{\circ}}\\\Rightarrow \mu_k=1.73$

The coefficient of kinetic friction is $1.7$ .

For static friction

$\mu_s\geq\tan30^{\circ}\\\Rightarrow \mu_s\geq0.577$

So, the minimum possible value for the coefficient of static friction is $0.577$ .

8 0

2 years ago

A car weighs 1323 N. what is its mass?

Shalnov [3]

If the car is on the moon, its mass is about 817 kg.

If it's on the Earth, its mass is about 135 kg.

6 0

2 years ago

Read 2 more answers

A sudden discharge of static electricity during a thunderstorm is called

Tpy6a [65]

Hello
It is called lightning. Lightning in a storm occurs when there are two regions (it can be cloud-cloud or cloud-ground), one with a strong excess of positive charges and the other one with a strong excess of negative charges. The two types of charge attract each other, and then a sudden flow of charges from one region to the other occurs, which is called lightning.

3 0

2 years ago

A boat, whose speed in still water is 2.50 m/s, must cross a 285-m wide river and arrive at a point 118m upstream from where it

son4ous [18]

The figure shows the arrangement of system

The velocity of boat can be resolved in to two

Horizontal component = vcos θ = 2.50 cos 45 = 1.768 m/s

Vertical component = vsin θ = 2.50 sin 45 = 1.768 m/s

Due to horizontal component the boat arrive arrives upstream,

Total horizontal velocity = 1.768 - Vr, where Vr is the velocity of river.

Total time taken to cross the river = width of river/ Vertical component of velocity

t = 285/1.768 = 161.20 seconds

So 118 meter is traveled at a velocity of 1.768-Vr in 161.20 seconds

That is 118 = (1.768-Vr)*161.20

1.768 - Vr =0.732

Vr = 1.036 m/s

So velocity of river flow =1.036 m/s

4 0

2 years ago