Answer:
Intake
Explanation:
It is the very first thing you do.
Figure 4: Four-Stroke Cycle In the first stroke, also known as the Intake Stroke or Induction, the piston travels from the top dead centre (TDC) to the bottom dead centre (BDC) with the intake valve open and exhaust valve closed. This creates a vacuum due to the increase in volume in the combustion chamber.
The stroke cycle is used in the operating cycle of gasoline or petroleum engines. The first stroke in the 4 stroke cycle is intake. Hence, option A is correct.
What is stroke cycle ?An internal combustion (IC) engine is referred to as having four strokes when the piston is rotating the crankshaft. A stroke refers to the whole journey of the piston along the cylinder, in either direction.
In gasoline/petrol engines, a four-stroke cycle is used. The four strokes are intake (1), compression (2), power (3), and exhaust (4). The intake port is on the right's blue side, and the exhaust port is on the left's brown side.
The piston head is surrounded by a thin sleeve called the cylinder wall, which provides a space for the combustion of fuel and the production of mechanical energy. Therefore, the first stroke of a 4 stroke cycle is intake.
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Which two of the minerals shown have a metallic luster?
Answer:
A and D
Explanation:
Answer:
A & D
Explanation:
identify the element present in the following compound zinc chloride
Answer:
Zinc Chloride: ZnCl2
Molar Mass: 136.315 grams per mole
Density: 2.907 grams per cubic centimetre
Melting Point: 563 K (290oC)
Boiling Point: 1005 K (732oC)
Explanation:
Brainliest please?
What is the amplitude ?
Answer: The amplitude is a measure of the strength or intensity of the wave
Explanation: when looking at a sound wave, the amplitude will measure the loudness of the sound.
Which is a diatomic molecule?
Na-CI
o=O
H-F
Si-O
which one
In sexual reproduction, a genetic mutation can ONLY be passed down to the offspring if it occurs in the sex cells.
True
False
(e)
6.8 g of hydrogen peroxide decomposes to produce 3.6 g of water.
Calculate the mass of oxygen produced when 68 g of hydrogen peroxide
decomposes.
The mass of oxygen produced when 68 g of hydrogen peroxide decomposes is 32g.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, where
W = given massM = molar massChemical reaction:
2H₂O₂ → 2H₂O + O₂
Moles of 68g of H₂O₂ = 68g / 34g/mol = 2mol
From the stoichiometry of the reaction:
2 moles of H₂O₂ = produces 1/2×2 = 1 mole of O₂
Mass of 1 mole of O₂ = (1mol)(32g/mol) = 32g
Hence required mass of oxygen is 32g.
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How many atoms are in 2.78 moles of carbon (C)?
Answer:
4.61/6
=0.7683 atom are there in 4.61 moles of carbon
Explanation:
The size of an atom would be described in _______.
Answer:
atomic radius
Explanation:
so radius
Answer:
Explanation:
The average size of an atom is about 100 picometers or one ten-billionth of a meter. Almost all of the mass of an atom is in its nucleus; almost all of the volume of an atom is occupied by electrons. The number of protons (also known as its atomic number) determines the element. Varying the number of neutrons results in isotopes.
Oxygen is most chemically similar to
Anitrogen
Bsulfur
Cfluorine
Answer:
Nitrogen is the answer
Which of the following can you physically change for a pure substance such as water, without altering the chemical composition?
a. melting point
b. density
c. color
d. state of matter
What is a reaction rate? PLEASE HELP
a. measure of the potential energy differences in reactants and products
b. measure of the activation energy needed
c. measure of how fast products are made
d.measure of collisions between molecules
Answer:
c
Explanation:
Reaction rate, in chemistry, the speed at which a chemical reaction proceeds.if you're studying the same thing I am then that would be it
Ples help is it Fission, Fusion, or Both 1. Incredibly high amounts of energy are released. ____ 2. Results in a nuclear change. ______ 3. The end product is heavier. _____ 4. Two nuclei become one. ____ 5. The end product is lighter. ____
Answer:
1. fission
2. both
3. fusion
4. fusion
5. fission
Explanation:
Fission refers to the splitting of a single nucleus into two or more small nuclei while fusion refers to the combination of two or more small nuclei into one heavy nucleus.
When a single heavy nucleus splits, energy is released and the end products are 2 or more lighter nuclei. On the other hand, when several light nuclei fuse into one nucleus, energy is absorbed and the end product is one heavy nucleus. Both fission and fusion result in a nuclear change.
Intermolecular forces do not have any effect on determining the physical properties of
substances such as surface tension and melting point.
True or false
Answer:
False
Explanation:
The physical properties of melting point, boiling point, vapor pressure, evaporation, viscosity, surface tension, and solubility are related to the strength of attractive forces between molecules. These attractive forces are called Intermolecular Forces.
Which of the following have the correct pairing of ion charge to the number of protons and electrons that would
deliver that charge for the ion written?
Select ALL that apply.
Select all that apply
А. 0-2: 8 protons and 4 electrons
B. Na+l: 11 protons and 10 electrons
С. N-3.7 protons and 10 electrons
D. Al 3. 13 protons and 16 electrons
Answer:
Explanation:
O-2 means that there are 2 more electrons than protons. This one is incorrect.
Na + 1 is correct. 11 protons and 10 electrons.
N-3 is correct 7 protons and 10 electrons.
AL+3 is incorrect. It goes the other way 13 protons 10 electrons.
If 150 g of sucrose dissolved in a 1.50 L water what is the molarity of a solution
Answer:
0.2923 molar
Explanation:
M = given mass /(molar mass× volume)
150/342(1.5)
150/513
0.2923M
A coffee cup calorimeter contains 153.21 g of water at 22.50 °C. A 65.454 g piece of iron is heated to 101.62 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 Jg·K and the specific heat capacity of water is 4.184 Jg·K. How much heat, , is lost by the piece of iron?
Answer:
Q = 2232J
Explanation:
In the system, the energy that is lost by the iron is:
Q = S*ΔT*m
Where Q is heat, S is specific heat of iron ΔT is change in temperature and m is mass of the piece of iron.
S = 0.449J/gK
ΔT = 101.62°C - 25.68°C = 75.94°C
m = 65.454g
Q = 0.449J/gK*75.94°C*65.454g
Q = 2232J
what describes a property of all elements
What is the speed of a car that has traveled 100 miles in 20 hours?
|
Answer:
5 mph
Explanation:
100 miles, 20 hours (divide by 2)
50 miles, 10 hours (divide by 2)
25 miles, 5 hours (divide by 2)
divide both sides by 5
5 miles, 1 hour
Answer:2
Explanation:
Which of the following statements is FALSE?
H2SO4 + 2 NaOH → Na2SO4 + 2 H2O is a double replacement reaction
2 KClO3 →KCl + 2 O2 is a decomposition reaction.
C6H12 + 9 O2 → 6 H2O + 6 CO2 is a single replacement reaction
CO2 + Na2O → Na2CO3 is a synthesis reaction
Answer: ITS FALSE
ExplaC6H12 + 9 O2 → 6 H2O + 6 CO2 is a single replacement reaction
nation:
which group of mamaals has the most mebers
Infraclass: Placentals
Placental mammals are the most diverse group of mammals with about 4000 discovered species.
Snow is a form of
E: evaporation
F. precipitation
G. condensation
H. transpiration
When water goes from its liquid state to a gas which are being broke
Answer:
Studies have revealed that evaporation—the process by which water changes from a liquid to a gas—from oceans, seas, and other bodies of water (lakes, rivers, streams) provides nearly 90% of the moisture in our atmosphere. Most of the remaining 10% found in the atmosphere is released by plants through transpiration.
Explanation:
boron phosphite
Formula please help fast please please help me please please help
Answer: The formula for boron phosphite is BP
Explanation:
The answer would be BP
Hope this helped!
Convert 48.5 grams of water to moles of water
Answer:
2.70 mol of water.
Explanation:
divide the given mass by the molar mass of water. 48.5 / 18.016g = 2.70 mol water.
A roller coaster is accelerating at 10m/s² before it comes to an abrupt stop at the end of the ride. The mass of the roller coaster is 900 kg. How much force was exerted on the roller coaster to bring it to a stop?
Answer:
9000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 900 × 10
We have the final answer as
9000 NHope this helps you
help help help plsss
Answer:
4.58×10^3
3.72×10^7
Explanation:
3.8×10^2 =380
+ 4.2×10^3=4200
= 4580 = 4.58×10^3
Which is a compound?
A. Orange and black shirts in a drawer
B. An alloy of copper and iron
C. Silicon and carbon in a molecule
D. A copper statue
please help, on a pex ! brainliest and an extra 50 points if right
Explanation:
c Silicon and carbon in a molecule
Help as fast possible I’ll mark you bbrainlist
Answer:
the farther they are the longer there cycle is. closer they are shorter time.
Separate the following gene sequence into codons: TACGTCTTACGCTATGTC
Answer really quick plssss
Answer:
I think it's AUGCAGAAUGCGAUACAG
Which cell organelle is like the construction site, where proteins are built? Which cell organelle packages and transports the protein to the food processing plant?
O vacuole, endoplasmic reticulum
O cell membrane, lysosome
Onbosomes, golgi bodies
O nucleus, mitochondria
Explanation:
The endoplasmic reticulum consists of a network of a tube-like passageway through which proteins from the ribosomes are able to be moved within a cell as the road system allows for movement throughout the city.
