Answers
Answer:
True True False
Explanation:
Valves are in most veins (to prevent backflow). Also valves in the chart and an in an combustion engine.
So the first statement is True.
Valves control the flow rate and direction of fluid within a closed system. So the second statement is True.
1 Pa = 1 N/m² So since 1 Pa equals to one newton per square metre the third statement is False.
Related Questions
A(n)
image cannot be projected and forms where light rays appear to originate.
Answers
Answer:
Eu não sei o que você está dizendo, mas boa sorte
Answer: Virtual
Explanation: A virtual image is an image that can not be formed on a screen. This type of an image is formed when the rays of light appear to meet at a point after reflection or refraction. Virtual images are always erect or upright.
What is the wavelength of a light frequency 7.21x10^14Hz
Answers
Answer:
6.0 x 105
Explanation:
Answer:6.0 x l05
Explanation:
A gas has a volume of 3.00 L at 65.0 C. The same gas has a volume of 11.4 L at 105 C and 1725 mmHg. What was the original pressure of the gas?
Answers
please helpppppppppp
Select the TRUE statements about the carbon cycle
The carbon cycle is the process in which carbon travels from the atmosphere into organisms and the Earth and then back into the atmosphere.
Plants take carbon dioxide from the air and use it to make food.
Animals eat food and the carbon is stored in their bodies or released during cellular respiration.
Water (H2O) is cycled around the Earth
Answers
the carbon cycle is the process in which carbon travels from the atmosphere into organisms and the earth and then back into the atmosphere
How many moles of O2 can be produced from 1.7 moles of KClO3?
Answers
Answer:
2.55 moles
Explanation:
Please see the step-by-step solution in the picture attached below.
Hope this answer can help you. Have a nice day!
How does the pressure of a container change as the volume is changed?
Answers
Answer: If the volume is decreased, the pressure would increase because the gas molecules have less space to move around. Same goes for the opposite; if the volume increased, the pressure would decrease because the molecules have more space to move and aren't packed as tightly .
Hope this helps!!!
How is a lithium atom (Li) different from a lithium ion (Li+)?
Li has fewer electrons than Li+
Li has more electrons than Li+
Li has fewer protons than Li+
Li has more protons than Li+
Answers
Answer:
Li has fewer protons than Li+
what happens to the density of a box full of leaves if you crush up all the leaves and place them in another box
A the density increases
B the density stays the same
C the density decreases
D the density first decreases, then increases
Answers
Answer:
B the density stays the same
PLZ HELP OR WILL FAIL!!
Label A drop downs are: condensation, melting, sublimation
Label B drop downs are: condensation, melting, sublimation
Label C drop downs are: condensation, melting, sublimation
Answers
Label A: Sublimation
Label B: Condensation
Label C: Melting
Remember sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. Condensation is the conversion of a vapor or gas to a liquid. Melting is becoming liquefied by heat.
Hope this helps!
Describe the interactions with the Sun, Earth and Moon system that result in Lunar Cycle / Phases.
Answers
Answer: The tides are another interaction in the sun-earth-moon system. The tides happen because the moon and sun pull on the oceans, causing them to rise and fall each day. The moon has a bigger effect than the sun because it is closer. The angle of the sun as the earth orbits over the course of a year causes the seasons.
Explanation:
balance the following equation:
!!!!
Answers
Answer:
CaC2 + 2H2O > C2H2 + Ca(OH)2
Explanation:
Count the amounts of Ca, C, H, and O, all separately on both sides.
Ca: 1 Ca: 1
C: 2 C:2
H: 2 H: 4
O: 1 O: 2
Now, your goal is to get both sides equal to each other by adding a 2 in front of H2O.
Which of the following compounds contains covalent bonds? *
Cs₂O
Fe₂O₃
NaCl
CCl₄
Answers
NaCI
Explanation:
I just worked this out the day before
The reaction for the combustion of methane is shown below. If 28.70g of methane
reacts with 51.40g of oxygen, how much water will be produced? Record your
answer with 2 decimal places.
CH
+
20,
oxygen
CO2
carbon dioxide
+ 2H,0
water
methane
Answers
Answer:
2.888mm needs for the reaction
NEED HELP WITH #1 WILL GIVE BRAINLIEST FOR CORRECT ANSWERS PLEEEASE HELPPP
Answers
Answer:
1) 64 grams of salt
2) Ce2(SO4)3
Explanation:
Answer:??
Explanation:
What is El Nino and La Nina explained? Please help fast
Answers
Answer:
el nino: the boy
la nina: the girl
Explanation:
Answer:
el nino is dinosour la nino is fishcat
Explanation:
Of the following chemical properties , which one is not one that Covalent compounds DO NOT have ?
a
They share electrons between their elements.
b
They have weaker bonds.
c
They have relatviely higher melting and boiling points.
d
Many of these compounds are usallly liquids or gases at room temperature.
Answers
Answer:
D. They are usually liquids or gases at room temperature.
Explanation:
Covalent compounds have covalent bonds, meaning that they share electrons between elements and have relatively higher melting melting and boiling points due to the strength of their bonds. However covalent bonds are weaker than ionic bonds which is why B is correct. D is the only incorrect one because it is incorrect and contradicts point C. If a substance has a high melting/boiling point than it is much more likely to be solid at room temperature because of the high temperature it needs to pass in order to be a liquid or gas.
Hope this helped!
Name this compound:
Ca(CO3)
Answers
Calcium Carbonate would be your answer!
hope it helps!
A balloon filled with air has a volume of 6.50 L, a pressure of 0.900 atm, and a temperature of 25.0oC. If it is left out overnight, during which the temperature decreases to 15.0oC and the pressure rises to 1.15 atm, what will the volume of the balloon be?
Answers
Answer:
4.92 L
Explanation:
Rearrange ideal gas law and solve.
Change C to K.
- Hope that helps! Please let me know if you need further explanation.
Which of the following is most likely a homogeneous mixture?
O A. A tossed vegetable salad
B. Chunky peanut butter
O C. Chocolate chip cookies
OD. A vanilla milkshake
Answers
Answer:
D)A vanilla milkshake
Explanation:
That’s the case because you can’t physically separate the different posts that make up the mixture.
I WILL GIVE BRAINLIEST PLEASE HELP
How many moles of NH₃ are needed to react in order to form 660. g (NH₄)₂SO₄ according to the following balanced equation: 2 NH₃ + H₂SO₄ --> (NH₄)₂SO₄ *
Answers
Answer:
10moles of NH₃ will produce 660g of (NH₄)₂SO₄
Explanation:
Equation of reaction:
2NH₃ + H₂SO₄ → (NH₄)₂SO₄
2 mole of NH₃ = 1 Mole of (NH₄)₂SO₄
Molar mass of NH₃ = [14 + (3*1)] = 17g/mol
Number of moles = mass / molarmass
Mass = number of mole * molarmass
Mass = 2 * 17 = 34g
Molar mass of (NH₄)₂SO₄ = [(14 + 4)*2 + (32 + 64)
Molar mass of (NH₄)₂SO₄ = 132g/mol
Mass = molar mass * number of moles
Mass = 132 * 1 = 132g
From the equation of reaction,
34g of NH₃ will produce 132g of (NH₄)₂SO₄
34g of NH₃ = 132g of (NH₄)₂SO₄
X g of NH₃ = 660g of (NH₄)₂SO₄
X = (34*660) / 132
X = 170g of NH₃
170g of NH₃ will produce 660g of (NH₄)₂SO₄
Number of moles = mass / molarmass
Molar mass of NH₃ = 17g/mol
Number of moles = 170 / 17
Number of moles = 10moles
Therefore 10moles of NH₃ will produce 660g of (NH₄)₂SO₄
In the reaction N2 + 3H2 - 2NH3, how many
grams of H, are needed to produce exactly I mole
of ammonia?
A. lg
B. 2g
C.3g
D.4g
Answers
Answer:
B. 2g
Explanation:
So first you have to find the mole to mole ratio then convert it to grams if that makes sense. So the mole to mole ratio is 2 ammonia to 3 hydrogen gas. So then after you do that conversion you can solve for grams then. Sorry I am not that great at explaining.
What is the key building block of living tissue and ecosystems?
Hope u can help!
Answers
Answer:
Your answer is cells. Hope this helps!
when the surface of a mirror curves inward, like the inside of a bowl, it is called a ____.
A) plane mirror
B) convex mirror
C) concave mirror
D) diffuse mirror
Answers
Answer:
C
Explanation:
The answer is always C
Answer:C. Concave mirror
Explanation:
When the surface of a mirror curves inward, like the inside of a bowl, it is called c. Concave mirror.
How could you test each molecule to
determine if it was DNA or RNA?
Answers
Answer:
Nucleobases should be checked. RNA contains adenine, guanine, cytosine and uracil instead of thymine, so if we isolate uracil, it means that it is RNA, if not, then is DNA.
Two friends are arguing about the structure of the universe. Caleb says that the universe is made of many galaxies that are
made of millions of stars and many galaxies that are made of millions of planets. Maria says that he is wrong because
galaxies like the Milky Way are made up of millions of universes with millions of stars.
Which best describes the error(s) that were made in this conversation?
Caleb is incorrect when he says that some galaxies are made of stars and some are made of planets, and Maria is
incorrect when she says that the Milky Way is a galaxy.
Maria is incorrect when she says that galaxies are made up of universes
Caleb is incorrect when he says that some galaxies are made of stars and some are made of planets and Maria is
incorrect when she says that galaxies are made up of universes
Maria is incorrect when she says that the Milky Way is a galaxy
Answers
Answer:
i put b but im not that sure
Explanation:
ASAP Would you expect the odor of an open bottle of perfume to spread through the air faster when the room temperature is 85F or 55F
Answers
Answer: The answer would be 85F
Explanation: The odour molecules become airborne much more quickly in a warmer environment than a colder one. So the bottle of perfume to spread faster through the air faster when the room temperature is 85F
4NH3(g) + 3O2(g) --> 2N2(g) + 6H2O(l)
H = 1530.4 kJ
If the temperature of this system is increased, then the equilibrium will shift to the _______ and the amount of N2 gas will _________.
a. left, increase
b. left, decrease
c. right, decrease
d. right, increase
Answers
Answer:
the right answer is : d
Explanation:
Because temperature is a cinetic factor.
What does “moving slow” mean to a geologist?
Answers
A landslide can be defined as a mass movement of material (e.g., rocks), which moves down a steep slope. A geologist is an expert that studies SLOW-MOVING landslides on a geological scale.
Landslides can occur suddenly or more slowly over long periods of time.
On a geological scale, landslides occur slowly so they are imperceptible to humans.
A geologist is a professional who investigates landslides on a geological scale, which is coarse on a human time-frame.
In conclusion, a geologist is a professional who investigates SLOW-MOVING landslides on a geological scale.
Learn more in:
https://brainly.com/question/5634603?referrer=searchResults
Explain why a small magnet will stick to a refrigerator door, but a nail will not stick.
Answers
Answer:
Magnets stick to the fridge door because, underneath the paint, the door is made of steel. Magnets are attracted to certain metals, and if the attraction is strong enough they can hold on even when upside down. ... This means that a magnet will always be attracted to the door. But an iron nail does not have any magnetic properties. So it doesnt get attracted.
Hope this helps, Pls mark as Brainliest!!
A small magnet will stick to a refrigerator door, but a nail will not stick
because magnets attract certain types of metals.
Magnets have a strong magnetic field which is why it attracts metals such
as iron and steel. The refrigerator must have been made with iron or steel
which was why the magnet stuck to it.
Metals such as aluminium and copper aren't attracted by magnets which is
why the nails weren't attracted as a result of it being made with metals which magnets don't attract.
Read more on https://brainly.com/question/19482396
Use the IUPAC nomenclature rules to give the name for this compound - CrPO4.
Answers
Answer:
i need help
Explanation:
