The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error.
In a closed all mass is conserved. tThe Conservation of mass explains the balanced chemical equation.
Conservation of mass:This law states that in a closed system the mass of the total mass of all reactants is equal to the total mass of products in a reaction.
For example -
[tex]\bold {CH_4 + 2O_2 \rightarrow2 H_2O +CO_2}[/tex]
1 mole of methane reacts with 2 moles of oxygen to produce 2 moles of water and 1 mole of Carbon dioxide.
Means 3 moles or reactant 3 moles of products.
Therefore, the Conservation of mass explains the balanced chemical equation.
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QUESTION IN THE ANSWER!!!!! HELP HELP PLEASE
Check the combination of the horses, review them, you'll get the answer.
a tool that uses lenses to focus light and
create useful images
the answer your looking for is Optical instrument.
-- microscope
-- eyeglasses
-- telescope (refracting type)
which of the following expressions is equivalent to the expression
[tex] \frac{ - 50}{8} [/tex]
a.
[tex] \frac{ - 50}{ - 8} [/tex]
b.
[tex] \frac{50}{ - 8} [/tex]
c.
Answer:
B. 50/-8
Explanation:
The expression -50/8 is equivalent to;
-50/8 = -6.25
The expression; 50/-8 is also equal to -6.25
Therefore;
The expression; -50/8 is equal to 50/-8
A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?
Answer:
0.45 J/gC
Explanation:
The heat absorbed by the sample of iron is given by:
[tex]Q=mC_s (T_f-T_i)[/tex]
where:
Q = 1004 J is the heat absorbed
m = 111.6 g is the mass of the sample
Cs is the specific heat capacity of iron
T_f = 20 C is the final temperature of the sample
T_i = 0 C is the initial temperature
Solving the equation for Cs, we find
[tex]C_s = \frac{Q}{m(T_f-T_i)}=\frac{1004 J}{(111.6 g)(20 C-0 C)}=0.45 J/gC[/tex]
A child sits 6 m away from the center of the merry go round. The centripetal acceleration acting on the child’ is 3.6 m/s^2. What is the tangential velocity of the child?
A 4.65 m/s
B 21.6
C 0.6 m/s
D 1.67 m/s
The centripetal acceleration is related to the tangential velocity according to the equation below.
a=v²/r where v is the tangential velocity and r the radius of the circular path.
thus v²=a×r
From the question provided, r=6m acceleration= 3.6m/s²
Therefore using these values in the formula v²=a×r
v=√(3.6×6)
v=√21.6
v=4.65
The answer is A. 4.65 m/s
What are the horizontal and vertical components of a
300 N force that is applied along a rope at 60° to the
horizontal and used to drag an object across a yard?
help! can u explain the solve? idk why my answer is always reverse, like the answer for horizontal, not for vertical. the answer for vertical, not for horizontal. so, i am confusing. pls help!
if u got the answer, thanks
Answer:
In the figure attached we can see in a better way this situation. If we are told the rope is at 60 degress to the horizontal, we can place this rope in the origin of the X-Y coordinate system.
If we observe in detail, we have a right triangle where the opposite side [tex]OS[/tex] to the angle [tex]60\º[/tex] is the vertical component [tex]F_{y}[/tex] and the adjacent side [tex]AS[/tex] is the horizontal component [tex]F_{x}[/tex] . So, we can use trigonometric functions to find the force [tex]F[/tex] (the hypotenuse [tex]h[/tex]) applied to the rope.
For [tex]F_{x}[/tex]:
We can use the trigonometric function cosine, which is defined as:
[tex]cos(60\º)=\frac{AS}{h}[/tex]
This means [tex]F_{x}=Fcos(60\º)[/tex]
[tex]F_{x}=300Ncos(60\º)[/tex]
[tex]F_{x}=150N[/tex]
For [tex]F_{y}[/tex]:
We can use the trigonometric function sine, which is defined as:
[tex]sin(60\º)=\frac{OS}{h}[/tex]
This means [tex]F_{y}=Fsin(60\º)[/tex]
[tex]F_{y}=300Nsin(60\º)[/tex]
[tex]F_{y}=259.8N[/tex]
Finally the horizontal and vertical components are 150 N and 259.8 N
as a box slides down a slope the presence of friction would
the friction would cause the box to move slower
How does a pulley make work easier?
A pulley makes work easier by redistributing the force required to lift an object, providing mechanical advantage and allowing the user to exert less force over a greater distance.
A pulley is a simple machine that consists of a grooved wheel and a rope or cable. It is used to change the direction or magnitude of a force, making it easier to lift or move heavy objects.
The primary concept behind how a pulley makes work easier is the principle of mechanical advantage. Mechanical advantage refers to the ability of a machine to multiply the input force applied to it, resulting in a greater output force. In the case of a pulley, it can provide a mechanical advantage by redistributing the force required to lift an object over a larger distance.
When a force is applied to one end of the rope wrapped around a pulley, the tension in the rope becomes equal throughout its length. This means that the force applied on one side of the pulley is transmitted to the other side with the same magnitude. As a result, the load being lifted is shared between the rope segments on each side of the pulley.
By using multiple pulleys, either in a fixed or movable configuration, a system of pulleys known as a block and tackle can be created. This arrangement allows for further mechanical advantage by increasing the number of rope segments supporting the load. Each additional pulley effectively divides the force required to lift the load, reducing the effort needed.
Therefore, a pulley system allows the user to exert less force over a greater distance, making it easier to lift heavy objects. The mechanical advantage provided by the pulley helps in minimizing the effort required to overcome the resistance or weight of the load, thus making work easier.
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An electron with a charge value of 1.6x10^-19 C is in the presence of an electric field of 300 N/C when located between a pair of oscilloscope deflecting plates. What force does the electron experience?
(1.6 x 10⁻¹⁹ C) x (300 N/C) = 4.8 x 10⁻¹⁷ Newton
The force experienced by the electron is 4.8×10⁻¹⁷ N.
Electric Field: An electric field is a region or space, where an electric force can be experienced or felt.
The formula of electric force is
F = E×Q............... Equation 1
Where F = Electric force, E = Electric field, Q = Charge.
From the question,
Given: Q = 1.6×10⁻¹⁹ C, E = 300 N/C
Substitute these values into equation 1
F = (1.6×10⁻¹⁹)(300)
F = 4.8×10⁻¹⁷ N.
Hence, The force experienced by the electron is 4.8×10⁻¹⁷ N.
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Which of the following objects is NOT in a state of equilibrium?
A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it.
Two teams pulling a rope in opposite directions, both with a force of 3670 N
An 80-N rope holding up a 920-N weight with a tension of 1000 N.
A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N
Answer:
A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it
Explanation:
An object is said to be in equilibrium when the net force acting on it is zero.
Let's analyze each option:
- A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it. --> NON-EQUILIBRIUM. In fact, the downward force (the weight of the object, 500 N) is more than the maximum upward normal force (450 N), so the net force is non-zero.
- Two teams pulling a rope in opposite directions, both with a force of 3670 N --> EQUILIBRIUM. Both forces are equal in magnitude and opposite in direction, so the net force is zero.
- An 80-N rope holding up a 920-N weight with a tension of 1000 N. --> EQUILIBRIUM. The total force pulling on one side is 80 N + 920 N = 1000 N, which is equal to the force on the other side.
- A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N --> EQUILIBRIUM. The total force pushing on one side is 250 N*2 = 500 N, which is equal to the force on the other side.
An alternating current in a wire has a voltage of 2,800 V. It needs to be reduced 70 V. The wire makes 120 turns in the primary coil of a step- down transformation. How many turns of wire need to be in the secondary coil?
To calculate the number of turns in the secondary coil, use the transformer equation. The number of turns in the secondary coil is found by multiplying the ratio of the secondary voltage to the primary voltage by the number of turns in the primary coil.
Explanation:To calculate the number of turns of wire needed in the secondary coil, we can use the transformer equation. The ratio of the secondary voltage to the primary voltage is equal to the ratio of the number of turns in the secondary coil to the number of turns in the primary coil. In this case, the primary voltage is 2,800 V and it needs to be reduced by 70 V. So, the secondary voltage is 2,800 V - 70 V = 2,730 V. The number of turns in the primary coil is 120. Using the transformer equation, we can find the number of turns in the secondary coil:
Number of turns in the secondary coil = (Secondary voltage / Primary voltage) * Number of turns in the primary coil
Number of turns in the secondary coil = (2,730 V / 2,800 V) * 120
Number of turns in the secondary coil = 117
Therefore, there should be 117 turns of wire in the secondary coil.
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The meteorological reports that today will reach a high of 45 F. Your friend from Sweden asks what the temperature will be in degrees Celsius. What value would you report to your friend
It would be 7.22 degrees Celsius.
Steps: (45°F − 32) × 5/9 = 7.222°C
I'm hungry as hell right now. How much time does someone need to die from starving?
About 2 months depends on the person
A sonic boom is caused by _____.
a sound-producing object moving toward an observer
a sound-producing object overtaking it’s own sound waves
a sound-producing object moving away from an observer
a sound-producing object traveling just slower than its own sound waves
the first one is the answer
Answer:
a
Explanation:
What is the structure located inside the nucleus of a cell that contains an organism’s genetic code?
This belongs in the bio section but the structure are the chromosomes that contain the DNA strands themselves containing the genetic information of any living things
One card is randomly selected from a deck of cards. Find the odds against drawing a spade greater than 2 and less than 7.
(Simplify your answer.)
The number of cards in a deck without jokers is 52. If you draw just one card then the probability is going to have 52 in the denominator
the cards between 2 and 7 in the spade suit are 3 4 5 6. Since you have written "between", 4 cards will be successful.
The answer is P(3,4,5,6) = 4/52 which reduces to 1/13
Answer 1/13.
The odds against drawing a spade greater than 2 and less than 7 from a deck of cards are 25 to 1.
Explanation:The odds against drawing a spade greater than 2 and less than 7 can be found by determining the probability of drawing a spade greater than 2 and less than 7, and then calculating the complement of that probability. Firstly, we need to determine the number of favorable outcomes, which is 2 (the 3 of spades and the 4 of spades). The number of possible outcomes is 52 (the total number of cards in the deck). Therefore, the probability of drawing a spade greater than 2 and less than 7 is 2/52, or 1/26. The complement of this probability, which represents the odds against drawing a spade greater than 2 and less than 7, is 1 - 1/26 = 25/26. So, the odds against drawing a spade greater than 2 and less than 7 are 25 to 1.
Choose all the answers that apply. The sun: -is the largest star in our solar system -is the largest star in our galaxy
- is made mostly of hydrogen and helium
-will eventually run out of fuel and die
-creates energy through nuclear reactions
-is made mostly of hydrogen and helium.
-will eventually run out of fuel and die.
-creates energy through nuclear reactions
Answer:
The sun:
-is the largest star in our solar system
- is made mostly of hydrogen and helium
-will eventually run out of fuel and die
-creates energy through nuclear reactions
Explanation:
The sun an average mass and sized star composed of hydrogen and helium gas. It generates energy in its core by nuclear fusion reaction. It is the only star in the solar system. Once all the fuel is run out, the nuclear fusion reaction would stop and the sun would die. There are billions of stars in our milky way galaxy and sun is not the largest of them.
In 2012, astronomers reported the discovery of a planet that revolved around two Sun-like stars. Kepler-34b, a gaseous planet, revolves around the stars every 289 days, and the stars revolve around each other every 28 days. This information was presented in the January 11, 2012, issue of the journal Nature. Based on the information in the article, which title would be most appropriate? New Planet Found in Open Cluster System New Planet Discovered in Binary Star System Discovery: New Globular Cluster and Planet Discovery: Star System Orbiting New Planet
The most appropriate title would be " New Planet Discovered in Binary Star System ".
This title doesn't have enough glitz and glamour to be the headline of the same information in a newspaper ... as they say, it wouldn't "sell papers". So a headline writer would have to make up a gripping, understandable, grabbing, popular, slightly misleading headline for it.
But the kind of people who read Nature don't need to be baited or tricked into reading something. They're already interested in the subject, and they may be people who work in researching it. They read that journal to keep up with what's happening with things they're already interested in.
Remember ... part of the modern Scientific Method is to let other scientists know all about what you're doing and what you're finding. Nature is one of the places where real scientists do that.
Answer:
New Planet Discovered in Binary Star System
Explanation:
3. The direction of the centripetal force acting on a ball on a string being spun in a circle around a person is
A. outward-seeking.
B. parallel to the person.
C. perpendicular to the person.
D. center-seeking.
D. center seeking. Good Luck
Answer: The correct answer is "center-seeking".
Explanation:
Centripetal force is the force which is required to keep the body in the circular motion. The direction of the centripetal force is towards center of the circle.
The expression for the centripetal force is as follows;
[tex]F= \frac{mv^{2} }{r}[/tex]
Here, r is the radius, v is the velocity and m is the mass of the object.
Without this force, the body cannot move in the circular motion. Then, it follows the straight line motion.
The direction of the centripetal force acting on a ball on a string being spun in a circle around a person is center-seeking.
Therefore, the correct option is (D).
an electrical generator is an important component in a power plant. which best shows the energy transfer diagram for a generator
Answer:The answer is B
Explanation:
A generator produces electricity. Energy enters the system (generator) as kinetic energy. It is converted into electrical energy, which can run electrical appliances. Some energy is always wasted as heat and sound. Therefore, Choice B is the best answer.
Answer:
B
Explanation:
it shows the best answer
If temperature increases, what happens to pressure? Question 3 options: Pressure increases. Pressure decreases. Pressure stays the same.
Answer:
Pressure increases
Explanation:
Gay- Lussac's law gives the relationship between pressure and the temperature. There exists a direct relationship between temperature and pressure as per Gay- Lussac's law as :
At constant volume, [tex]pressure\propto temperature[/tex]
It is clear that pressure and temperature are directly proportional to each other. So, if temperature increases, pressure also increase. Hence, the correct option is (A) " Pressure increases ".
Answer: the pressure increases!
The _____(height or width) of a sound wave determines its _____(loudness or pitch).
Sound waves are longitudinal mechanical waves, that is, they depend on a medium to propagate.
Among the characteristics of a sound wave, it is the amplitude, that is the degree of movement of the molecules of the medium in which the wave propagates.
Depending on how high this amplitude is, the sound will be louder.
Answer:
1. height
2. loudness
To move a heavy couch across a carpeted floor what could be used to decrease the frictional force
Use a piece of cardboard
Put a lubricant between the surface of the object and the floor. use round objects, like pencils, to decrease the friction and push the refrigerator over the pencils
Please help, I don’t get the question.
All you have to do is get the culmative effect of the forces by predicting the direction in which each object will move. Just write down what you know and put down questions for your teacher.
definition of liquid
a substance that is not solid
plz give me a brainliesttttt
According to the dictionary, the definition of liquid is, "a substance that flows freely but is of constant volume, having a consistency like that of water or oil."
When two objects collide, what happens to the total momentum of the interacting forces? Explain why (use the vocabulary: momentum, potential energy and kinetic energy) How is mass related?
In a closed system, when two or more particles collide, the sum of momentum of two particles before and after collision will always be the same. In elastic collision, kinetic energy and momentum of a particle remains conserved. Whereas in inelastic collision, momentum remains same before and after collision but some of the particle's kinetic energy may be converted to other forms of energy.
A moving particle or object may possess kinetic energy and it depends mainly on its motion and mass. The kinetic energy is converted into potential energy and converted back to kinetic energy during collision of small particles.
The efficiency of a machine increases as the temperature inside _____ relative to the temperature outside.
The efficiency of a machine increases as the temperature inside increases relative to the temperature outside.
Answer:
The correct answer is increases.
Explanation:
According to the second principle of thermodynamics, when two objects at different temperatures come into thermal contact with each other, thermal energy always flows from the hottest object to the coldest.
Therefore we deduce that if the inside temperature of the machine is higher than the outside temperature, the machine will have a higher efficiency.
Have a nice day!
Which is the goal of technology
TO bring joy and ease
It is the use of a (usually) mechanical means to create something physical that uses some scientific principle that will be used in war or for the betterment of man or both.
It is a machine that creates destruction or good or both that uses some sort of scientific basis of which it is an application.
James Cameron piloted a submersible craft to the bottom of the Challenger Deep, the deepest point on the ocean's floor, 11,000 m below the surface. What was the total inward force on the 1.1-m-diameter pilot sphere in which Cameron sat?
Answer:
[tex]4.1\cdot 10^8 N[/tex]
Explanation:
First of all, we need to find the pressure exerted on the sphere, which is given by:
[tex]p=p_0 + \rho g h[/tex]
where
[tex]p_0 =1.01\cdot 10^5 Pa[/tex] is the atmospheric pressure
[tex]\rho = 1000 kg/m^3[/tex] is the water density
[tex]g=9.8 m/s^2[/tex] is the gravitational acceleration
[tex]h=11,000 m[/tex] is the depth
Substituting,
[tex]p=1.01\cdot 10^5 Pa + (1000 kg/m^3)(9.8 m/s^2)(11,000 m)=1.08\cdot 10^8 Pa[/tex]
The radius of the sphere is r = d/2= 1.1 m/2= 0.55 m
So the total area of the sphere is
[tex]A=4 \pi r^2 = 4 \pi (0.55 m)^2=3.8 m^2[/tex]
And so, the inward force exerted on it is
[tex]F=pA=(1.08\cdot 10^8 Pa)(3.8 m^2)=4.1\cdot 10^8 N[/tex]
The total inward force is about 4.1 × 10⁸ N
[tex]\texttt{ }[/tex]
Further explanationLet's recall Hydrostatic Pressure formula as follows:
[tex]\boxed{ P = \rho g h}[/tex]
where:
P = hydrosatic pressure ( Pa )
ρ = density of fluid ( kg/m³ )
g = gravitational acceleration ( m/s² )
h = height of a column of liquid ( m )
Let us now tackle the problem!
[tex]\texttt{ }[/tex]
Given:
depth of the ocean's floor = h = 11 000 m
diameter pilot sphere = d = 1.1 m
atmospheric pressure = Po = 10⁵ Pa
Asked:
total inward force = F = ?
Solution:
[tex]F = P A[/tex]
[tex]F = ( P_o + \rho g h ) A[/tex]
[tex]F = ( P_o + \rho g h ) ( \pi d^2 )[/tex] → Area of Sphere = π d²
[tex]F = ( 10^5 + 1000 \times 9.8 \times 11000 ) ( \pi \times 1.1^2 )[/tex]
[tex]F \approx 4.1 \times 10^8 \texttt{ Newton}[/tex]
[tex]\texttt{ }[/tex]
Conclusion:The total inward force is about 4.1 × 10⁸ N
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Pressure
HBr is added to water to form a solution. How does adding HBr to the water affect its PH level?
HBr has hydrogen ions (H+), not hydroxide ions (OH-).
Therefore, HBr is an acid, which decrease the pH level.
The answer is A.
the answer is D) your welcome :)))