the explosive tnt has a heat of combustion of 3406 kj/mol. is this higher or lower than sugar?
Answers
TNT's heat of combustion is 3406 kJ/mol lower than that of sugar, which is 5639 kJ/mol. TNT burns at a lower temperature, which means that it will explode more quickly. For sugar, the heat-up period will be somewhat longer.
What is Heat?Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.
What is TNT?The term "TNT equivalent," which is frequently used to refer to the energy produced in an explosion, is a typical approach to transmit energy. A metric ton (1,000 kilograms) of TNT is equal to 4.184 gigajoules, or roughly the amount of energy released when a ton of TNT detonates.
Hence, TNT's heat of combustion is 3406 kJ/mol lower than that of sugar, which is 5639 kJ/mol.
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Related Questions
The weightlifter in question #9 picks up a mass weighing 300kg. What is the pressure that his feet now exert on the floor? (attached image of question 9 for reference)
Answers
According to the question, The pressure that the weight lifter's feet now exert on the floor is approximately 431200 Pa.
What is a mass ?The amount of matter in an entity or particle is represented by the dimensionless number mass (symbolized m). The kilogram is the International System's (SI) preferred measure of mass. (kg).
The weight lifter's weight calculated as:
Weight = mass x gravity
Weight lifter's weight = 140 kg x 9.8 m/s^2 = 1372 N
The weight of the mass the weight lifter picks up is:
Weight of the mass = mass x gravity = 300 kg x 9.8 m/s^2 = 2940 N
Therefore, the total weight exerted by the weight lifter and the mass is:
Total weight = Weight lifter's weight + Weight of the mass = 1372 N + 2940 N = 4312 N
The pressure exert on the floor can be calculated as:
Pressure = Force / Area
Assuming the weight lifter's weight is distributed equally on both feet and each foot has an area of approximately 50 cm^2,
the pressure on each foot calculated as:
Pressure on each foot = Total weight / (2 x Area of each foot)
Pressure on each foot = 4312 N / (2 x 50 cm^2 x 0.0001 m^2/cm^2) = 4312 N / 0.01 m^2 = 431200 Pa
Therefore, the pressure that the weight lifter's feet now exert on the floor is approximately 431200 Pa.
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A mechanic uses a screw driver to install a 1⁄4-20 UNC bolt into a mechanical brace. What is the mechanical advantage of the system? What is the resistance force if the effort force is 5 lb
Answers
Answer:
15.7 ; 78.5
Explanation:
Given that
The mechanic use a screw driver to install 1⁄4-20 UNC bolt
And, the effort force is 5lb
We need to find out the mechanical advantage
And, the resistance force
As we know that
The Mechanical advantage of a screw = Circumference ÷ pitch
where,
Circumference = pi × d
pi = 3.142, D = diameter
So,
Circumference = 3.142 × (1 ÷ 4)
= 0.785 in
Now
Pitch = 1 ÷ TPI
Here TPI (thread per inch) = 20
Pitch = 1 ÷ 20 = 0.05
So,
Mechanical advantage = 0.785 ÷ 0.05
= 15.7
Now Resistance force if effort force is 5lb
We know that
Mechanical advantage = Fr ÷ Fe
Here
Fe = effort force, Fr = resistance force
15.7 = Fr ÷ 5
Fr = 15.7 × 5
= 78.5 lbs
You throw a ball straight forward with a velocity of 20
m/s, from a height of 1 meter. How far will it be when it hits the ground after 0.45 seconds?
Answers
The ball will continue to advance at a speed of 2.0 m/s once it rolls off the edge of the table until it lands on the ground after 0.45 seconds.
Why do we do it?The ball is behaving just like it has been dropped. Nature is unconcerned by the fact that it is also advancing.
D=1/2gt2 and T=√2d/g
By entering the table's height and the gravitational acceleration, we can calculate the time in seconds:
t= √2(1.5m)/9.8m⋅s−2 = 0.553s
So, for a little bit longer than a half-second, the ball will be in the air (and thus able to move ahead). To find the distance travelled, we simply reverse the speed equation, s=dt, and insert in the speed and time:
d= 20m/s(0.553s)= 1.11m
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when the voltage across the capacitor is 8.00 v , at what rate is energy being stored in the capacitor?
Answers
The capacitor is a storage device for electrostatic potential energy. The charge and voltage between the capacitive sensor's plates are thus relevant.
What Else is a Capacitor Used For?The primary function of a capacitor is to reduce the distance between an intermittent voltage supply and a desired constant voltage. Additional applications for a capacitor are as follows:Convert AC to DC. In this crucial "smoothing" application, the DC output typically varies sinusoidally.Coupling. Standard capacitors block DC while letting AC through.Decoupling. In a DC circuit, capacitors can also get rid of any possible AC.Radios with older RF technology. To change the station, you can change the variable "tuning" capacitors; as an educational tool for this tutorial, Timers, you can even construct your own radio.Use the time it takes a capacitor to charge to a specific level to trip additional circuit components. Capacitive timing functions have been largely replaced by integrated circuits and microcontrollers, similar to RF tuning.Touchscreens : A capacitive touchscreen is one of the most widespread uses of a capacitor, despite being exotic in comparison to other circuits discussed here. These gadgets convert the change in capacitance at a specific location on a display device into coordinates on an X-Y plane.Capacitors that are very small. These gadgets act as Flash memory data storage units. The largest number of capacitors currently in use, given the infinite number of bits in Flash memory, are microscopic capacitors.To Learn more About capacitor refer to :
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Which of these systems is not an isolated system to which conservation of momentum can be applied
Answers
Open system is not an isolated system to which conservation of momentum can be applied.In mechanics, an isolated system is a physical system that does not interact with its surroundings. Conservation of momentum is only valid for an isolated system. Momentum is conserved in such a system.
The closed system is a system in which there is no net transfer of mass between the system and its surroundings, but there may be transfer of energy. It is considered a more general concept than the isolated system, which does not allow any energy or matter transfer to and from the system.
Example: If a rocket is moving in space without any external force or effect then it is known as an isolated system.In open systems, both mass and energy can be exchanged with the environment. The open system is not an isolated system to which the conservation of momentum can be applied.Example: An aquarium containing fish, plants, and water is an example of an open system because the fish and plants breathe, the fish eat food and produce waste, and water evaporates.
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Can someone complete this assignment will give brainliest!
The assignment is attached
Answers
how much time will it take to perform 440 joule of work at a rare of 11 w?
Answers
Answer:
40sec
Explanation:
Data
Work = 440 J
Power= 11watt
time = ?
Power = work done/time
===> time = work done/power
= 440/11
= 40sec
which of these correctly compares the masses of different objects in the universe?
Answers
A moon has more mass than the planet it circles and less mass than a star.
Do planets have a greater mass than stars?
By this definition, "stars" must be larger than planets in terms of mass. The size of a white dwarf would be comparable to that of a moon or small planet, but its mass would be approximately 200–1300 times that of Jupiter. Even more extreme are neutron stars, which are about the size of an asteroid but have a mass of several thousand Jupiters.
Why is the weight of the same object different on different planets Class 7?
The weight of an object is determined by its mass and the gravitational force that it experiences. The separation between two objects affects how strong gravity is. Because of this, an object weights differently on many planets.
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TRUE/FALSE. if an object remains at rest, then the sum of both the external torques and the external forces on the object must be zero.
Answers
It is true if the sum of both the external torques and the external forces on an object is zero, then the object must be at rest .
What happens when object remains at rest?Newton's First Law states that an object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, then it will continue to move in a straight line with constant velocity.
If net external force on a system of particles is zero then the velocity of the center of mass of the system must also be constant. A body is said to be in rest if it does not change its position continuously with respect to surroundings and with the passage of time.
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Which of the following is most often used to change the direction of a force, but not the strength of the force?
a. a ball bearing b. a rope
c. a spring d. a parachute
Answers
Just check if it’s correct
b. a rope
Explanation:With the use of the rope, you can pull the object in any direction with the same magnitude which would change the direction but not the magnitude.
an object that is 2.84 tall is located 25.2 in front of a lens. a virtual image is formed at a distance 36.6 from the lens. what is the focal length of the lens (in )?
Answers
To find the focal length of the lens, we can use the lens formula:
1/f = 1/v - 1/u
Where:
f is the focal length of the lens,
v is the distance of the virtual image from the lens, and
u is the distance of the object from the lens.
In this case, the object is located 25.2 inches in front of the lens, so u = -25.2 inches (negative because it is in front of the lens). The virtual image is formed at a distance of 36.6 inches from the lens, so v = 36.6 inches.
Substituting these values into the lens formula, we have:
1/f = 1/36.6 - 1/(-25.2)
Simplifying this equation, we get:
1/f = (1/36.6) + (1/25.2)
To combine the fractions, we need to find a common denominator. In this case, the least common multiple of 36.6 and 25.2 is 918, so we rewrite the equation as:
1/f = (25.2 + 36.6) / (36.6 * 25.2)
1/f = 61.8 / 918
1/f ≈ 0.0673
Now, we can take the reciprocal of both sides to find f:
f ≈ 1 / 0.0673
f ≈ 14.84 inches
Therefore, the focal length of the lens is approximately 14.84 inches.
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What is the name of the part of the wave that is labeled -
answer: amplitude
the ones who have to watch the video
Answers
Answer:
amplitude
Explanation:
sound travel and it amplifies
Una persona pesa 700 N al nivel del mar. ¿Cuándo sube a un avión a 10000 m de altura pesará más, igual o menos?
Answers
Answer:
La persona pesa menos
Explanation:
Generalmente, definimos el peso como la fuerza gravitacional que actúa sobre un objeto.
Dado que la constante gravitacional depende del cuadrado de la distancia medida desde el centro de la Tierra, podemos concluir que el peso de un objeto disminuye a medida que aumenta la distancia entre el objeto y el centro de la Tierra (mayor altitud).
Por lo tanto, la persona que pesa 700 N al nivel del mar pesará menos cuando esté en un avión a una altitud de 10,000 m.
A researcher warts to test the hypothesis that the awerage number of mles that a 2010 Honda Clvic can drive after its gas meter reads as empty is greater than 30 . She collects data from a sample of 50 cars and finds a sarmole mean of 37 . She assumes the standart deviation is 8 based on the literature about car manufacturing- What is the test statistic (Z-score)? 1.99 2.86 b.19 4.55
Answers
The test statistic (Z-score) is approximately 4.95.
To calculate the test statistic (Z-score) for this hypothesis test, we can use the formula:
Z = (sample mean - hypothesized population mean) / (standard deviation / sqrt(sample size))
Sample mean (X-bar) = 37
Hypothesized population mean (μ) = 30
Standard deviation (σ) = 8
Sample size (n) = 50
Substituting these values into the formula, we get:
Z = (37 - 30) / (8 / sqrt(50))
Z = 7 / (8 / 7.071)
Z = 7 / 1.414
Z = 4.95 (rounded to two decimal places)
A statistical hypothesis test is a technique for determining if the available data are sufficient to support a certain hypothesis. We can make probabilistic claims regarding population parameters using hypothesis testing.
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Question:
Identify whether the following physical quantities are vectors or scalars, and explain your choice.
a. Temperature
b. Gravity
c. Volume
d. Number of pages in a book
e. Wind speed and direction
Vectors and Scalars:
The physical quantities can be distinguished in terms of vectors and scalars pertain to the magnitude and direction of that quantity. The examples of physical quantities that can be sort into vectors and scalars are temperature, gravity, volume, number of pages in a book, wind speed and direction, etc.
Answers
Gravity and wind speed are vector quantity , Temperature , Volume , Number of pages in a book are the scalar quantity
In terms of their size and direction, the physical quantities may be divided into scalars and vectors.The examples of physical quantities that can be sort into vectors and scalars are temperature, gravity, volume, number of pages in a book, wind speed and direction, etc.
The following quantities are:
Temperature- The temperature is a scalar number since it just needs the magnitude (heat content) and not the direction.
Gravity - It is comparable to the force with which the Earth pulls an item that is always pointed toward its center. The amount is a vector since both magnitude and direction define it.
Volume - it is the pitch of a sound wave which is nothing but a form of energy which causes the sensation of hearing. Since the direction is not required to measure a sound level (determined by the corresponding frequency of the sound wave) but the only magnitude, therefore, it is a scalar.
The amount is a scalar since the number of pages in a book is entirely determined by a numerical value without the requirement for a direction.
Wind Speed and Direction - Since both the wind's magnitude in terms of speed and direction are necessary, the quantity is a vector.
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A volume of 25 milliliters is the same as a volume of ____________________ cubic centimeters.
Answers
Answer:
25 cm³
Explanation:
In the conversion of units, we know that are one cubic centimeters (cm³) in a milliliter (mL) .
1 milliliter = 1 cubic centimeter
25 milliliters = 25 cubic centimeters
Therefore, a volume of 25 milliliters is the same as a volume of 25 cubic centimeters.
This ultimately implies that, the volume of an object in milliliters is equivalent to its volume in cubic centimeters.
Can a body be in equilibrium if it is revolving clockwise under the action of a single force?
Answers
Answer: A rotating body or system can be in equilibrium if its rate of rotation is constant and remains unchanged by the forces acting on it.
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(b) What is the probability that the electron can be detected in the middle one third of well, region (b)
Answers
In order to determine the probability that an electron can be detected in the middle one-third of a well region, we need to take into account the wave function and the boundary conditions.The wave function represents the probability density of finding the electron in a particular location within the well. The boundary conditions are determined by the geometry of the well, which can be rectangular, triangular, or other shapes.
The Schrodinger equation is used to calculate the wave function and determine the probability density of finding the electron in a particular location. The wave function is a complex function that describes the position and momentum of the electron. It is also used to calculate the energy of the electron in the well.The probability of finding the electron in the middle one-third of the well can be determined by integrating the probability density over the middle one-third of the well region. This will give us the probability of finding the electron in that region. The integral can be evaluated using numerical methods or analytical methods, depending on the complexity of the wave function and the boundary conditions.In general, the probability of finding the electron in the middle one-third of the well will depend on the shape of the well, the energy of the electron, and the boundary conditions. For example, if the well is rectangular and the electron is in the ground state, then the probability of finding the electron in the middle one-third of the well will be high. However, if the well is triangular and the electron is in an excited state, then the probability of finding the electron in the middle one-third of the well will be lower.For such more question on probability
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Convert: 8 mm: ____________ cm
Answers
-1^10
centi=10 mm and mm=1/10=10^-1 cm
what refers to the loudest tone that is produced?
1. fundamental tone
2. obstructive tone
3. tenor tone
4. alto tone
Answers
Answer:
1. fundamental tone
Explanation:
not the others are not Right
two loudspeakers in a 20∘c room emit 686 hz sound waves along the x-axis. assume a sound speed of 343 m/s..what will be the pitch?
Answers
The pitch of the 686 Hz sound waves emitted by two loudspeakers in a 20°C room with a sound speed of 343 m/s will be 686 Hz.
The pitch of a sound wave refers to its frequency, which is the number of cycles or vibrations per second. In this case, the loudspeakers emit sound waves with a frequency of 686 Hz. The speed of sound in air is approximately 343 m/s at room temperature.
The temperature of the room (20°C) is not directly related to the pitch calculation. Therefore, the pitch of the sound waves remains constant at 686 Hz, regardless of the room temperature or the speed of sound.
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1.A ball is dropped from the top of a tower 80 ft high
at the same instant that a
second ball is thrown upward from the ground with an initial
velocity of 40 ft
per sec. When and where do they pass, aand with what relative velocity?
Answers
Answer:
187.5
Explanation:
A rock rolls off a 25m cliff at 12m/s. Give me values for every variable that you can in the horizontal an vertical direction
Answers
As a rock rolls off a 25 m cliff at speed 12 m/sec. So vertical speed is 12 m/sec and horizontal is is 0 m/sec.
What is speed?The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
Given in the question a rock is moving from cliff so the component of the speed are vertical speed is 12 m/sec and horizontal is is 0 m/sec.
As a rock rolls off a 25 m cliff at speed 12 m/sec. So vertical speed is 12 m/sec and horizontal is is 0 m/sec.
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A 5000ton frieight is moving at a speed of 10mph, next to it a 3250lb Ferrari at a speed of 250mph. Both hit the break, but who stops first?
Answers
Answer:
Ferrari would stop first.
Explanation:
The momentum of a moving body is given as:
momentum, P = mass of the body x its velocity
i. For the Freight,
mass = 5000 tons = 4535924 kg
speed = 10 mph = 4.4704 m/s
P = mv
= 4535924 x 4.4704
= 20.28 x \(10^{6}\)
P = 20.28 x \(10^{6}\) kgm/s
ii. For the Ferrari,
mass = 3250 lb = 1474.175 kg
speed = 250 mph = 111.76 m/s
P = mv
= 1474.175 x 111.76
= 16.48 x \(10^{4}\)
P = 16.48 x \(10^{4}\) kgm/s
Comparing the momentum of the two objects, the Ferrari would stop fist when break is applied.
There is a current of 2.95 A in one of the copper wires for 60 seconds. Calculate the charge flow through the wire.
Answers
Answer:
177 coulomb
Explanation:
Given data
I=2.95A
T=60
The relationship between current I and quantity of charge Q.
Q=IT
Substitute
Q=2.95*60
Q=177 coulomb
what is an object that can hold things together or lift an object?
Answers
Answer:
Inclined plane = 2. Something that can hold things together or lift an object. Wedge = 3.
Explanation:
Screw is simple machine which is used to hold to objects together
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QUESTION 11 What is the phase of the moon when the moon is on the opposite side of the earth from the sun? a. The full moon. b. The new moon The crescent moon d. The gibbous moon. e. The quarter moon.
Answers
The phase of the moon when the moon is on the opposite side of the earth from the sun is the full moon. This happens when the sun, earth, and moon are aligned, with the earth in the middle.
The full moon appears when the sun’s light reflects off the entire surface of the moon, making it appear completely illuminated from our perspective on earth.Therefore, option A is the correct answer: The full moon.
When the moon is on the opposite side of the Earth from the sun, it is in the full moon phase. During this phase, the sun illuminates the entire side of the moon facing the Earth, making it appear fully lit and round. This occurs because the sun, Earth, and moon are aligned in a straight line, with the Earth in the middle. The full moon phase is characterized by a bright, round shape and is often considered the most visually striking lunar phase. It occurs approximately once every 29.5 days as the moon orbits around the Earth.
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3. What exerts a greater force on the table of 2 kg book lying flat or a 2 kg book on its
side? Which applies greater pressure? If the book measures .3m x.2 m x.05m Calculate
the pressure applied in each situation.
Answers
Answer:
A book on its side exerts a greater force.
Explanation:
Pressure = Force / Area
Assuming that 1kg = 10N
2kg = 20N
Area of book lying flat = 0.3m × 0.2m
= 0.6m²
Pressure of book lying flat = 20N / 0.6m²
= 30Pa (1 s.f.)
Area of book on its side = 0.2m × 0.05m
= 0.01m²
Pressure of book on its side = 20N / 0.01m²
= 2000Pa (1 s.f.)
Since 2000Pa (1 s.f.) > 30Pa (1 s.f.), a book on its side applies greater pressure than lying flat.
an electron moving in a uniform magnetic field experiences the maximum magnetic force when the angle between the direction of the electron's motion and the direction of the magnetic field is A) 0 B) 45°C ) 90° D) 180°
Answers
An electron moving in a uniform magnetic field experiences the maximum magnetic force when the angle between the direction of the electron's motion and the direction of the magnetic field is 90°. So, option C) is correct.
The correct answer is C) 90°. This is because the magnetic force on a charged particle, say, an electron, moving in a magnetic field is given by F = qvBsinθ, where q is the charge of the particle, v is its velocity, B is the magnetic field strength, and θ is the angle between the velocity vector and the magnetic field vector.
When θ = 90°, sinθ = 1, and therefore the magnetic force is at its maximum value. When θ = 0° or 180°, sinθ = 0, and the magnetic force is zero.
When θ = 45°, sinθ is less than 1, so the magnetic force is less than its maximum value.
The magnetic force acting on a moving charged particle is given by F = q(v × B), where F is the magnetic force, q is the charge of the particle, v is its velocity, and B is the magnetic field.
The cross product (v × B) in the formula implies that the magnetic force is at its maximum when the angle between the velocity and the magnetic field is 90 degrees.
So, option C) is correct.
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How does one stage in a stars life lead to another