Which is a chemical property that can be used to identify calcium carbonate

Answers

Answer 1

Answer:

one atom of calcium, one atom of carbon, and three atoms of oxygen

CaCO3

(sorry if this is not what you are looking for)

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Write a paragraph that explains why hot-air ballons float

Answers

First, they float because of gravity and the air that is in the hot air balloon.The operator of the hot air balloon can steer the hot air balloon so you cam get to where you want to go.

I hope this is good enough.And i hope this helps.

A train is accelerating at a rate of 2 km/hr/s. If its initial velocity is 20 km/hr, what is its velocity after 30 seconds?

Answers

Here it is. *WARNING* VERY LONG ANSWER

________________________________________...
11) If Galileo had dropped a 5.0 kg cannon ball to the ground from a height of 12 m, the change in PE of the cannon ball would have been product of mass(m),acceleration(g)and height(h)

The change in PE =mgh=5*9.8*12=588 J
______________________________________...
12.) The 2000 Belmont Stakes winner, Commendable, ran the horse race at an average speed = v = 15.98 m/s.

Commendable and jockey Pat Day had a combined mass =M= 550.0 kg,

Their KE as they crossed the line=(1/2)Mv^2

Their KE as they crossed the line=0.5*550*(15.98)^2

Their KE as they crossed the line is 70224.11 J

______________________________________...
13)Brittany is changing the tire of her car on a steep hill of height =H= 20.0 m

She trips and drops the spare tire of mass = m = 10.0 kg,

The tire rolls down the hill with an intial speed = u = 2.00 m/s.

The height of top of the next hill = h = 5.00 m

Initial total mechanical energy =PE+KE=mgH+(1/2)mu^2

Initial total mechanical energy =mgH+(1/2)mu^2

Suppose the final speed at the top of second hill is v

Final total mechanical energy =PE+KE=mgh+(1/2)mv^2

As mechanical energy is conserved,

Final total mechanical energy =Initial total mechanical energy

mgh+(1/2)mv^2=mgH+(1/2)mu^2

v = sq rt [u^2+2g(H-h)]

v = sq rt [4+2*9.8(20-5)]

v = sq rt 298

v =17.2627 m/s

The speed of the tire at the top of the next hill is 17.2627 m/s
______________________________________...
14.) A Mexican jumping bean jumps with the aid of a small worm that lives inside the bean.

a.)The mass of bean = m = 2.0 g

Height up to which the been jumps = h = 1.0 cm from hand

Potential energy gained in reaching its highest point= mgh=1.96*10^-4 J or 1960 erg

b.) The speed as the bean lands back in the palm of your hand =v=sq rt2gh =sqrt 0.196 =0.4427 m/s or 44.27 cm/s
_____________________________
15.) A 500.-kg horse is standing at the top of a muddy hill on a rainy day. The hill is 100.0 m long with a vertical drop of 30.0 m. The pig slips and begins to slide down the hill.

The pig's speed a the bottom of the hill = sq rt 2gh = sq rt 2*9.8*30 =sq rt 588 =24.249 m/s
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16.) While on the moon, the Apollo astronauts Neil Armstrong jumped up with an intitial speed 'u'of 1.51 m/s to a height 'h' of 0.700 m,

The gravitational acceleration he experienced = u^2/2h = 2.2801 /(2*0.7) = 1.629 m/s^2
______________________________________...

EDIT
1.) A train is accelerating at a rate = a = 2.0 km/hr/s.

Acceleration

Initial velocity = u = 20 km/hr,

Velocity after 30 seconds = v = u + at

Velocity after 30 seconds = v = 20 km/hr + 2 (km/hr/s)*30s =

Velocity after 30 seconds = v = 20 km/hr + 60 km/hr = 80 km/ hr

Velocity after 30 seconds = v = 80 km/hr=22.22 m/s
_______________________________-
2.) A runner achieves a velocity of 11.1 m/s 9 s after he begins.

His acceleration = a =11.1/9=1.233 m/s^2

Distance he covered = s = (1/2)at^2=49.95 m

3. What conclusion would you draw if a seismogram from a particular seismic station showed only P waves?4. Why is it better to use data from three or more seismic stations to find the epicenter of an earthquake?

Answers

3. The Earthquake occured on the other side of the Earth

Explanation:

One of the main difference between P-waves and S-waves is that P-waves can travel through solids and liquids, while S-waves can only travel through solids. They are not able to travel through liquids.

So, if a seismic station showed only P waves, it means that there was some area in liquid state between the seismic station and the hypocenter of the earthquake. Inside the Earth, the outer part of the core is made of liquid, so this means that there outer core was along the line connecting the seismic station and the hypocenter and "blocked" the S-waves: therefore, the earthquake occurs on the other side of the Earth.

4. In order to determine with precision the location of the epicenter

Explanation:

One seismic station is only able to determine the distance of the epicenter - so, by using one seismic station only, we are only able to tell that the epicenter is located on a point along a circle, centered around the seismic station.

If we use two seismic station located at different points, we can draw two circles of possible locations for the epicenter, one for each seismic station. The intersection between the two circles will give us the exact location of the epicenter. However, two circles have two intersections: therefore, there is still an ambiguity concerning the exact location of the epicenter.

If we use three stations, therefore, we can draw three circles, and they have one intersection only: this intersection will give us the exact location of the epicenter.

Answer:

1. P waves can travel through liquid and solids and gases, while S waves only travel through solids. Scientists use this information to help them determine the structure of Earth. For example, if an earthquake occurs on one side of Earth, seismometers around the globe can measure the resulting S and P waves.

2. P waves can travel through liquid and solids and gases, while S waves only travel through solids. Scientists use this information to help them determine the structure of Earth. For example, if an earthquake occurs on one side of Earth, seismometers around the globe can measure the resulting S and P waves.

3. If a seismogram records P-waves and surface waves but not S-waves, the seismograph was on the other side of the Earth from the earthquake because those waves cannot travel through the liquid core of the earth.

4. Scientists use triangulation to find the epicenter of an earthquake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. Knowing this helps them calculate the distance from the epicenter to each seismograph.

5. As the P and S waves travel out from an earthquake the P waves get progressively farther ahead of the S waves. Therefore, the farther a seismic recording station is from the earthquake epicenter the greater will be the difference in time of arrival between the P and S wave.

Where does the name "Black Hole" get it's name?

Answers

The "Black Hole" gets its name from the astronomical amount of gravitational force created by the black hole. This gravitational force is so great that even light cannot escape it, hence, it is completely black

nothing escapes them not even light therefore they are (dark) and we see them be literally black holes

TRICK QUESTION:WHAT IS HEAVIER: 1 POUND OF FEATHERS, 1 POUND OF BRICKS, 1 POUND OF SUGAR OR 1 POUND OF WATER

Answers

they are all the same, because they all weigh the same. they are all 1 pound
Hope this helped :)

This is such a tricky question!

The answer is: they all weigh equally, for the weights are all equal to 1 pound~

Giving out 30 pionts PLEASE I NEED HELP RIGHT AWAYYYY!!!!!!!!!!!!!!!!choose the term that best completes each sentence
1.the higher the temperature of something, the greater its _______________
2. the change in state from gas to liquid is called_______________
3. energy that comes from bonds within matter is called_________________
4. the change in state from liquid to gas is called_____________
5. gas bubbles forming throughout the liquid is called_______________
6. liquid changing to gas only at the surface is called_________________
7. the change in state from solid to liquid is called____________
8. the change in state from liquid to solid is called____________
9. the___________states that during any change, the amount of energy stays the same
10. another term for a chemical change is a_____________
11. in____________, particles pass directly from solid to gas
words:
chemical energy
thermal energy
evaporation
melting
freezing
boiling
law of conservation
vaporization
condensation
sublimation
chemical reaction

Answers

1.the higher the temperature of something, the greater its thermal energy.
2. the change in state from gas to liquid is called evaporation.
3. energy that comes from bonds within matter is called chemical energy.
4. the change in state from liquid to gas is called vaporization.
5. gas bubbles forming throughout the liquid is called boiling.
6. liquid changing to gas only at the surface is called evaporation.
7. the change in state from solid to liquid is called melting.
8. the change in state from liquid to solid is called freezing.
9. the law of conservation states that during any change, the amount of energy stays the same
10. another term for a chemical change is a chemical reaction
11. in sublimation, particles pass directly from solid to gas

There ya go, Champ. Now you have all the answers and you haven't
learned a thing.

the higher the temperature of something, the greater its thermal energy.
the change in state from gas to liquid is called evaporation.
energy that comes from bonds within matter is called chemical energy.
the change in state from liquid to gas is called vaporization.
gas bubbles forming throughout the liquid is called boiling.
liquid changing to gas only at the surface is called evaporation.
the change in state from solid to liquid is called melting.
the change in state from liquid to solid is called freezing.
the law of conservation states that during any change, the amount of energy stays the same
another term for a chemical change is a chemical reaction

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