Morant Bay is 33 km south of Port Antonio a pigeon can fly at a speed of 1.2 m s what is the displacement of morant bay from Port Antonio
Answers
Answer:
33km due south
Explanation:
Morant Bay is 33km south of Port Antonio;
Problem: displacement of Morant bay from Port Antonio;
Displacement is a vector quantity. It is the length of path between two position and the direction inclusive.
So, it has magnitude and must be specified with a direction.
- Therefore, the displacement of Morant Bay from Port Antonio is 33km due south.
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B. For most of its life cycle, star A appeared substantially brighter than star B from earth
C. For most of its life cycle, star B appeared substantially brighter than star A from earth
Answers
Only five supernovae have ever been documented as being visible to the unaided eye, with two of those believed to be core-collapse supernovae. Thus, option B is correct.
What is are the process of supernova formation?
Iron atoms are compressed so closely together that the nuclei's repelling forces cause the squeezed core to recoil, which causes the star to go supernova and generate a massive, superheated shock wave.
A supernova explosion takes place in a star over the course of just 100 seconds. A star that experiences a supernova explosion dies and leaves behind a neutron star or a black hole as a remnant.
The largest explosion that mankind have yet witnessed is a supernova. Each explosion is the incredibly bright, incredibly potent explosion of a star. The largest explosion that mankind have yet witnessed is a supernova.
Therefore, For most of its life cycle, star A appeared substantially brighter than star B from earth
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Answers
The mass of the reaction system is conserved because, the mass lost from the reaction by the evolution of gas is collected inside a balloon to inflate it. Thus , the balloon and the flask creates a closed system where no mass is lost outside.
What is conservation of mass?
According to the law of conservation of mass, the mass can neither be created nor be destroyed. Thus the total mass of the system is conserved. However similar to the energy, mass can be transformed into energy.
As per this law, the total mass in a chemical reaction is conserved. Where, the total mass in the reactant side is equal to the total mass in the product side.
When the reaction flask is closed with a balloon, the gas if any evolved from the reaction will be collected to the balloon and it inflates. Thus the mass lost from the reaction system does not goes to the surroundings due to the closed system.
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Answers
Answer:
Iron has a standard electrode potential which is less than gold, which therefore means the gold is less reactive,
Answers
Answer:
False
Explanation:
Activation energy is the minimum amount of energy required for a reaction to proceed. Hence, for a reaction (endothermic and exothermic) to occur/proceed, the activation energy must be met. This is because, a reaction is only endothermic or exothermic when the reaction has started/occurred. If the activation energy is not produced, there will be no reaction in the first place.
NOTE: Exothermic reaction is a reaction that involves the release of energy (heat or light) into the surroundings. While endothermic reaction is a reaction that requires the input of energy or it absorbs energy from the environment.
Answers
ºF = 19 x 1.8 + 32
ºF = 34.2 + 32
= 66.2ºF
hope this helps!
Answers
Answer : The value of of the reaction is, 480.29 KJ.
Explanation :
Formula used :
where,
= internal energy of the reaction = ?
= enthalpy of the reaction = 483.6 KJ/mole = 483600 J
= change in the moles of the reaction = Moles of product - Moles of reactant = 3 - 2 = 1 mole
R = gas constant = 8.314 J/mole.K
T = temperature =
Now put all the given values in the above formula, we get:
Therefore, the value of of the reaction is, 480.29 KJ.
2 H2O(g) → 2 H2(g) + O2(g)
You can see that there are 2 moles of gas in the reactants and 3 moles of gas in the products.
1 moles of ideal gas occupies the same volume as 1 mole of any other ideal gas under the same conditions of temp and pressure.
Since it is done under constant temp and pressure that means the volume change will be equal to the volume of 1 mole of gas
2 moles reacts to form 3 moles
The gas equation is
PV = nRT
P = pressure
V = volume (unknown)
n = moles (1)
R = gas constant = 8.314 J K^-1 mol^-1
- the gas constant is different for different units of temp and pressure (see wikki link) in this case temp and pressure are constant, and we want to put the result in an equation that has Joules in it, so we select 8.314 JK^-1mol^-1)
T = temp in Kelvin (kelvin = deg C + 273.15
So T = 403.15 K
Now, you can see that PV is on one side of the equation, and we are looking to put PdV in our dE equation. So we can say
dE = dH -dnRT (because PV = nRT)
Also, since the gas constant is in the unit of Joules, we need to convert dH to Joules
dH = 483.6 kJ/mol = 483600 Joules/mol
dE = 483600 J/mol - (1.0 mol x 8.314 J mol^-1K-1 x 403.15 K)
dE = 483600 J/mol - 3351.77 J
dE = 480248.23 J/mol
dE = 480.2 kJ/mol