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MA_775_DIABLO [31]
4 years ago
15

at room temperature, iron is a solid and mercury is a liquid. based on this information we can infer thata. iron has a higher bo

iling point than mercury.b. mercury has a higher melting point than iron.c. iron and mercury have similar melting points.d. the boiling point of iron and mercury are both low.
Physics
2 answers:
olchik [2.2K]4 years ago
8 0
A. iron has a higher boiling point thanmercury.
max2010maxim [7]4 years ago
8 0

Answer:

A

Explanation:

The general rule when it comes to the states of matter is that, the higher the temperature gets, the more the individual molecules vibrate, and they have more energy to escape the bonds that hold them in place. While, if the temperature decreases, then the molecules have less kinetic energy and the bonds/forces between the molecules ends up keeping them in a position where they cannot escape.

So with the example of iron. Iron is solid at room temperature, and hence would have a high melting point and boiling point, when compared with a substance that is liquid at room temperature (mercury).

If mercury is in a liquid state, then that means it is closer to its boiling point, than another element in a solid state.

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Calculate how far ahead of the drop zone a pilot would have needed to drop humanitarian aid packages if the delivery occurred at
ozzi

Answer:

S = 11488.42 m

Explanation:

Given,

The speed of the jet, v = 0.74 Mach

                                     = 253.82 m/s

The altitude of the jet, h = 10000 m

Since the jet is travelling horizontally, the vertical component of velocity Vy = 0

The equation for a projectile projected from a height h is given by,

                                  S = Vx [Vy + √(Vy² +2gh)] / g

Since Vy = 0

                                   S = Vx √(Vy² +2gh) / g

                                       = 253.82 x √(2 x 9.8 x 10000) / 9.8

                                       = 11488.42 m

Hence, the humanitarian aid package should be delivered ahead of distance, S = 11488.42 m

6 0
3 years ago
Which describes the average velocity of an ant traveling at a constant speed
yanalaym [24]

Answer: A. The total displacement divided by the time and  C. The slope of the ant's displacement vs. time graph.

Explanation:

Hi! The question seems incomplete, but I found the options on the internt:

A. The total displacement divided by the time.

B. The slope of the ant's acceleration vs. time graph.

C. The slope of the ant's displacement vs. time graph.

D. The average acceleration divided by the time.

Now, since we know the ant is travelling at a constant speed, its average velocity V will be expressed by the following equation:

V=\frac{d}{t}

Where:

d is the ant's total displacement

t is the time it took to the ant to travel to the kitchen

Hence one of the correct options is: A. The total displacement divided by the time

On the other hand, this can be expressed by a displacement vs. time graph graph, where the slope of that line leads to the equation written above. So, the other correct option is: C. The slope of the ant's displacement vs. time graph.

3 0
3 years ago
A U-shaped tube open to the air at both ends contains water. A quantity of oil of unknown density is slowly poured into the righ
nadezda [96]

Answer:

\rho_o=600\ kg.m^{-3} is the density of the oil

Explanation:

Given:

  • height of oil column, h_o=20\ cm
  • oil column height that is more than the water column height in the other arm, \delta h=8\ cm

<u>Now from the given it is clear that the height of water column is:</u>

h_w=h_o-\delta h

h_w=20-8

h_w=12\ cm

Now according to the pressure balance condition of fluid columns:

Pressure due to water column = Pressure due to oil column

P_w=P_o

\rho_w.g.h_w=\rho_o.g.h_o

1000\times 9.8\times 0.12=\rho_o\times 9.8\times 0.2

\rho_o=600\ kg.m^{-3} is the density of the oil

8 0
4 years ago
Read 2 more answers
A man travels 630 km partly by car and partly by bus. It takes 12 hours in all of he travel 180 in by bus and rest by car. if he
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Answer : 45 km/hr

Explanation:

6 0
3 years ago
A car is traveling West on Old Milton Parkway at 100 km/hr when the driver spots a police cruiser in the bushes. The driver hits
Alisiya [41]

The answer is option C) The car experienced negative acceleration with velocity in the positive direction.

5 0
3 years ago
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