What action-reaction forces are involved when a rocket engine fires?
The reaction force is the hot gas pushing back on the rocket propelling it into outer space. There is no need for air to push on because the hot gases produced by the rocket allow the action and reaction forces to operate.
(hope this helps ^^)
who discovered silver and how?
Answer:
Silver was discovered in Greece
Answer:
En 1516 Juan Díaz de Solís descubrió en Sudamérica el mar Dulce que posteriormente Sebastián Caboto denominó Río de la Plata, creyendo que allí abundaba el precioso metal, y de donde tomará el nombre la Argentina.
Explanation:
A car emits 8.6 kg of CO2 per gallon of unleaded gas. How much CO2 is produced if the car 2.5 burns gal of fuel?
Answer:
2.5 gallon fuel produced 21.5 kg CO₂.
Explanation:
Given data:
CO₂ produced during burning of one gallon fuel = 8.6 kg
CO₂ produced during burning of 2.5 gallon fuel = ?
Solution:
This problem is solved through simple multiplication.
If one gallon fuel produced 8.6 kg CO₂ then 2.5 gallon produced is determined by multiplying the 2.5 with 8.6 kg.
1 gallon = 8.6 kg CO₂
2.5 × 8.6 kg CO₂ = 21.5 kg
Thus 2.5 gallon fuel produced 21.5 kg CO₂ .
is the minimum amount of material needed to sustain a nuclear reaction.
Answer:
critical mass
Explanation:
Answer:
critical mass
Explanation:
In which of the following states of matter are the particles very far apart and
move freely?
O solids only
O solids and liquids only
O solids, liquids, and gases
O gases only
Answer:
Gas
Explanation:
In a gas, particles are in consistent straight-line movement. The motor energy of the atom is more prominent than the alluring power between them, hence they are a lot farther separated and move unreservedly of one another.
Answer: Gases only
Explanation: because there are gas all around us. You can walk though the air with slamming into it like its a brick wall. that's because the particles are far apart allowing it to move freely.
Hopefully this helps.
The element aluminum has an atomic number of 13.
How many protons are in the nucleus of an aluminum atom?
How many electrons does an aluminun atom have?
Answer:
Aluminum has (by definition) 13 protons, 13 positively charged particles. Because aluminum is neutral (as is all matter), it therefore has 13 negatively charged particles, electrons
Where is energy stored in living sytems
Answer:
energy is stored in the chemical bonds in molecules
Explanation:
Please answer ASAP
How many moles of KBro3 are required to
prepare 0.0700 moles of Br2 according to the
given reaction?
KBrO3 + 5KBr + 6HNO3➡️6KNO3 + 3Br2 + 3H2O
A. 0.0233
C. 0.220
B. 0.210
D. 0.0704
Answer:
A. 0.0233
Explanation:
according to the equation,
no. of moles of KBrO3 : no. of moles of Br2 = 1 : 3
no. of moles of KBrO3
= ⅓ × 0.0700mol
= 0.0233 (3 sig. fig.)
The moles of KBrO₃ are required to prepare 0.0700 moles of Br₂ according to the given reaction is 0.023 moles.
What is the stoichiometry?Stoichiometry of the reaction gives idea about the amount of entities present before and after the completion of chemical reaction.
Given balanced chemical reaction is:
KBrO₃ + 5KBr + 6HNO₃ → ️6KNO₃ + 3Br₂ + 3H₂O
From the stoichiometry of the reaction, it is clear that:
3 moles of Br₂ = produced from 1 mole of KBrO₃
0.07 moles of Br₂ = produced from 1/3×0.07=0.023 moles of KBrO₃
Hence required moles of KBrO₃ is 0.023 moles.
To know more about stoichiometry, visit the below link:
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which of the following models of the atom was supported by the gold experiment?
. An atom can be called a particle, but a molecule is never called a particle.
Answer:
it's because a particle is a very small matter piece, and an atom is a very small piece of matter, but a particle is some atoms joined together to make a substance, but a particle, which is made from atoms, can't be called atoms.
Explanation:
The Valence Electron shell is the first shell next to the nucleus. true or false
64 ounces to liters in unit conversion form
Answer:
1.892 L. 64 fluid ounces = 1.892 liters (or L)
Metamorphic rocks that show layers of dark minerals alternating with layers of light minerals are classified as ____.
What determines how the atoms are organized on the periodic table of elements?
FIRST ANSWER GETS CROWNED BRAINLIEST!!!!!!
A truckload of plastic soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What it the mass of the plastic shreds inside one of the drums in kg? Assume lowest density within the range.
Answer:
75,900 g
Explanation:
m=d×v
(1.38g/cm^3) × (55,000)
If 150 grams of water is to be heated from 15.0°C to 100°C to make a cup of tea, how much heat must be added? The specific heat of water is 4.18 J/g°C
Answer:
53295 J or 53kJ
Explanation:
The specific heat of a substance is the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree celsius.
The specific heat of water is 4.18 J/g°C. This means that to raise one gram of a sample of water by one degree celsius, 4.18 J of energy is required.
The heat energy (q), required to raise the temperature (ΔT) of a given substance, with a given mass (m) and specific heat capacity (c) is given by the formula;
q= m.c.ΔT
Substituting the data given into the formula, we will have,
q= 150g . 4.18 J/g°C . (100 - 15)°C
= 53295J
or 53kJ
How many fluorine atoms are there in 5 molecules of CH3FO?
What is the mass of 2.591 × 10^8 mol S
Answer in units of g
Answer: The answer is 18.01528.
I assume you are converting between grams H2O and mole.1 grams H2O is equal to 0.055508435061792 mole.
Explanation:
Why are constants important during an investigation
Answer:
Control Constants Control constants or control variables are quantities a researcher holds steady during an experiment. Even though the value or state of a control constant may not change, it is important to record the constant so the experiment may be reproduced. Examples: temperature, day/night, duration of a test, pH
Answer:
TL;DR: In a science experiment, the controlled or constant variable is a variable that does not change. For example, in an experiment to test the effect of different lights on plants, other factors that affect plant growth and health, such as soil quality and watering, would need to remain constant.
Find the number of moles of 452 g of Iodine.
Answer:
3.5617342714563267
Explanation:
1.) Decide if the following equation is always true, sometimes true, or never true.
2(x + 3)=5x + 6 - 3x
A) Always True
B) Sometimes True
C) Never true
Decide if the following equation is always true, sometime true, or never true.
2.) x - 3=2x - 3 - x
A) Always True
B) Sometimes True
C) Never True
PLEASE HELP!!!!!!
Explanation:
(1) The given equation is :
2(x + 3)=5x + 6 - 3x
Solving LHS first.
2(x + 3) = 2x +6
Solving RHS
5x + 6 - 3x = 2x+6
LHS = RHS
So, it is always true.
(2) The given equation is :
x - 3=2x - 3 - x
LHS = x - 3
Solving RHS
2x - 3 - x = x-3
LHS = RHS
So, it is always true.
Help me out in this problem
Answer:
The light rays are refracted in the water
Explanation:
The reason why the spoon is bent in the water is due to the refraction of light rays in water.
Refraction is a property of waves in which they bend as they cross from the boundary of one medium to another.
Usually, when light rays passes from a less dense medium to a denser one, the rays are bent towards the normal.
The rays which forms the spoon in the water will be bent as it passes through the air - water boundary. This is why the spoon would be seen as bent.are milliseconds or kilo seconds larger?
Answer:
kilo seconds
Explanation:
kilo prefix means it is large and . milli as small
3. Rank each of the following in order of DECREASING atomic radius
a. Cl, Br, Ga
Answer:
Br,Ga,Cl?
Explanation:
Select all answers that are correct.
George Washington Carver received _____ from God during early morning walks in the woods.
guidance
inspiration
finances
solutions
Answer:
inspiration
Explanation:
A cube is 4 cm on each side. What is its volume?
Answer: 64cm^3
Answer:
yeah
Explanation:
which of the following statement best describes metamorphosis
Answer:
Process of rock formations
Explanation:
After hearing the siren, the student runs into her house and tells her mother there must have been an accident down the street.
She just made a(n).
A inference
B hypothesis
C observation
D prediction
Answer:
A
Explanation:
she inferred that was the end result.
Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin scale?
The difference is .......... kelvin
Hiii
Help me pls.
Answer:
The difference is 293.15 Kelvin.
Explanation:
Given data:
Temperature difference of matter = 20°C
Temperature difference of matter in kelvin = ?
Solution;
Formula:
0°C +273.15
now we will put the values instead of 0.
20°C + 273.15 = 293.15 K
Thus, the temperature difference between two sample is 293.15 K.
11. The strength of a force is measured in
Answer:
In units.
Explanation:
Such as newtons or pounds.
The strength of the force is basically expressed by magnitude. The correct option is B.
A force's magnitude, which denotes its size, intensity, or quantity, is used to represent its strength.
A force's magnitude is a scalar quantity, which means that it is characterized purely by its numerical value and unit of measurement.
Forces are commonly quantified in Newtons (N) in the context of physics. The magnitude of a force indicates how powerful or weak the force is, regardless of its direction.
The direction of a force, on the other hand, denotes the line or route along which the force acts. While direction is crucial in understanding the overall influence of forces, magnitude measures the strength and determines the force's impact on an item or system.
Thus, the correct option is B.
For more details regarding force, visit:
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Your question seems incomplete, the probable complete question is:
The strength of the force is expressed by?
(A). Direction
(B). Magnitude
(C). Both
(D). None
