Answer: 16.3 kcal
Explanation:
Given that the reaction releases 68 kJ or 68000 J. One cal is 4.184 J. Thus, 68000 J is 16.25 kilocalories.
What is exothermic reaction?An exothermic reaction is the reaction which evolves heat energy to the surroundings. The given reaction is an exothermic double displacement reaction.
The given reaction involves the displacement of nitrate and Cl groups in between silver metal and hydrogen. This reaction releases a heat of 68kJ or 68000 J
given, 1 cal of energy = 4.184 J
hence, 68000 J = 68000/4.184 = 16252 cal
One kilocalorie = 1000 calories
thus, 16252 calories = 16.25 kilocalories.
Therefore, the given reaction, releases 16.25 kilocalories of energy.
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Which subatomic particle is NOT found in the nucleus of an atom? *
-protons
-neutrons
-electrons
Answer:
Neutrons
Explanation:
Neutrons are not found in the nucleus of an atom
Answer:
Electrons
Explanation:
=> electrons are not found in nucleus of the
atom
=>. they are outside the nucleus
=> revolving around the nucleus in fixed orbit
hope it helps
physics!!! please help D:
what prevents friction
Answer:
control of friction can be done with the help of lubricants
Explanation:
Water molecules are formed by covalent
bonding. What effect does this have on
the water molecule?
creates a polar molecule with two positive
ends
creates a nonpolar molecule with two positive
ends
creates a nonpolar molecule with one positive
and one negative end
creates a polar molecule with one positive
and one negative end
Answer:
When covalent compounds dissolve in water, they break apart into molecules, but not individual atoms. Water is a polar solvent, but covalent compounds are usually nonpolar. This means covalent compounds typically don't dissolve in water, instead, it makes a separate layer on the water's surface.
Explanation:
I don't understand the second part but hope this helps.
Help pls.!! and explain please
Answer:
so if it's 20 you should put 20 times 10 15 * 30 and 1.3 * 5 mg and if you put that milligrams in there it'll solve the destination I saw the white way you going so yeah just be careful at least you want to make the milligrams even a multimacy with the y i and replace it with the 14a
How is speed different from velocity?
Answer:Speed is the time rate at which an object is moving along a path
Velocity is the rate and direction of an object's movement.
Explanation:
Hope it helps
Plssss help I need good grade!!!! Plssss and thank u
Answer:
the answer is 'b'
According to me
Answer:
B
Explanation:
It has more negative signs than positive signs
For a converging lens, a ray arriving parallel to the optic axis
a. appears to come from the principal focal point.
b. passes through the principal focal point.
c. passes through the "other" focal point.
d. appears to come from the "other" focal point.
Answer:
b. passes through the principal focal point.
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
A lens can be defined as a transparent optical instrument that refracts rays of light to produce a real image.
Basically, there are two (2) main types of lens and these includes;
I. Diverging (concave) lens.
II. Converging (convex) lens.
A converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image. This type of lens is usually thin at the lower and upper edges and thick across the middle.
For a converging lens, a ray arriving parallel to the optic axis passes through the principal focal point.
The correct option is b. passes through the principal focal point.
The following information should be considered:
Light wave refers to an electromagnetic wave that does not require a medium of propagation for it to travel via a vacuum of space where no particles exist. A lens refers to a transparent optical instrument that refracts rays of light to produce a real image.
Basically, there are two (2) main types of lens:
Diverging (concave) lens: Converging (convex) lensA converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image.
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Plzzz help!! A stationary speed gun emits a
microwave beam at 2.10x1010 Hz. It
reflects off a car and returns 1030 Hz
higher. What is the speed of the car?
(Unit = m/s)
Answer:
The speed of the car is 14.7m/second or 15 m/second approximately.
Explanation:
A microwave beam at [tex]2.10\times10^1^0Hz[/tex] is generated by a stationary speed gun. It bounces off a car and returns at a higher frequency of 1030 Hz. The car's observed frequency would be the product of adding the two frequencies. That is to say,
F =[tex]2.1\times10^1^0+1030[/tex] =[tex]2.100000103\times10^1^0Hz[/tex]
Using doppler effect formula
[tex]F=\frac{C}{C-V}\times f[/tex]
Where
F = observed frequency
f = source frequency
C = speed of light = [tex]3\times10^8[/tex]
V = speed of the car
Putting the values in the formula -
[tex]2.100000103\times10^1^0=\frac{3\times10^8}{3\times10^8-V}\times2.1\times 10^1^0[/tex]
[tex]\frac{2.100000103\times10^1^0}{2.1\times10^1^0}[/tex] [tex]=\frac{3\times10^8}{3\times10^8-V}[/tex]
[tex]1.000000049=\frac{3\times10^8}{3\times10^8-V}[/tex]
by cross multiplication ,
300000014.7 - 1.000000049V = [tex]3\times10^8[/tex]
Collect the like terms
1.000000049V = 14.71429
Make V the subject of formula
V = [tex]\frac{14.71429}{1.000000049}[/tex]
V = 14.7 m/s
Therefore , the speed of the car is 15m/second approximately.
This process releases a large amount of . Energy ,oxygen ,or water
Answer:
carbon dioxide i think please be right
6. Explain how you could increase the potential energy of an object. *
Answer:
a doubling of the height will result in a doubling of the gravitational potential energy.
Explanation:
What are 3 items that can be found in each layer of the atmosphere?
Answer:troposphere, stratosphere, mesosphere and thermosphere and exosphere
Explanation:
Explain how do you determine the intensity of earthquake
Answer:
The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes.
Answer:
To measure the magnitude of an earthquake, the American scientist Charles Richter developed a scale in 1935. Known as the Richter scale, it assigns a number based on the height of the waves on a seismogram (the visual output of a seismograph). Seismographs measure ground motion, including the energy released by an earthquake.
As our Sun exhausts its supply of hydrogen, it will cool down by 1000 to 2000 Kelvin. But it will also become about 100 times brighter than it is now. Describe the path our Sun will take on the HR diagram, and what type of star the Sun will become.
Answer:
It will move upward and to the right, from the main sequence to the giants.
Explanation:
Plato answer so change it up a bit xx
A ball is launched horizontally at a speed of 4.0m/s from the top of a cliff that is 24.6 meters high. Where in the ball's trajectory is the horizontal speed a maximum? Explain how you know.
Answer:
The horizontal speed of the ball is constant where there is little resistance from the air
Explanation:
From the given parameters of the ball, we have;
The horizontal speed of the ball = 4.0 m/s
The height of the cliff from which the ball is launched = 24.6 meters
The direction in which the ball is launched = Horizontally
The components of the forces acting on the ball are;
The vertical force = The Earth's gravitational attraction
The horizontal force = 0 N (There are no horizontal forces acting on the ball)
According to Newton's first law of motion, the ball will continue in its uniform motion or in its rest state unless acted upon by a force
Therefore, given that there are no horizontal forces component acting on the ball, (little air resistance) the ball will continue with the initial horizontal velocity, such that the horizontal velocity of the ball remains constant.
When hydrogen reacts with oxygen, hydrogen loses electrons. Which term
applies to what happens to hydrogen in this reaction?
A. Oxidation
B. Synthesis
C. Reduction
D. Redox
Answer:
A.) Oxidation
Explanation:
:p
Hydrogen reacts with oxygen, hydrogen loses electrons. The term
applies to what happens to hydrogen in this reaction is
A. Oxidation
What is oxidation reaction ?
Oxidation is a process where a substance: Loses one or more electrons or gains an oxygen atom or we can say that oxidation is a process which involves the addition of oxygen or any electronegative element or the removal of hydrogen or any electropositive element.
Reduction is the gain of electrons or reduction is a process which involves the addition of hydrogen or any electropositive element or the removal of oxygen or any electronegative element.
A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic.
correct option is A. Oxidation
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Speed of a car is 30 m/s. Find its speed in km/h.
110 km/h
5.3 km/h
108 km/h
109 km/h
Answer:
108km/h
Explanation:
1km=1000m
3600s=1 hr
M/s= 3600/1000km/hr= 3.6km/hr
30m/s= 30×3.6km/hr = 108km/hr
3. How does the wavelength of green different from violet-indigo?
Answer:
As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.
Explanation:
It’s due in like 2 hourssss!!
1. A force of 52N acts upon a 4kg block sitting in the ground. Calculate the acceleration of the object (show work)
2. An object of mass 10kg is accelerated upward at 2 m/s^2. What force is required? (Show work)
3. What is the mass of an object if a force of 17N caused it to accelerate at 1.5m/s^2? (Show work)
Answer:
1. Acceleration = 6.25 m/s²
2. Force = 20 Newton.
3. Mass = 11.33 kg
Explanation:
Given the following data;
1. Force = 25N
Mass = 4kg
To find the acceleration;
Acceleration = force/mass
Acceleration = 25/4
Acceleration = 6.25 m/s²
2. Mass = 10kg
Acceleration = 2 m/s²
To find the force required;
Force = mass * acceleration
Force = 10 * 2
Force = 20 Newton.
3. Force = 17N
Acceleration = 1.5 m/s²
To find the mass;
Mass = force/acceleration
Mass = 17/1.5
Mass = 11.33 kg
3. How did the team of physicists
make the phonon laser?
Answer:
A team led by Nick Vamivakas has now made the levitated optomechanical analogue to the optical laser by expanding on the optical tweezer,By measuring the scattered light, we are then able to alter the way the beads oscillate and increase the output of energy as measured in phonons
Explanation:
Xander goes airborne on his scooter as he exits a half-pipe at Newton's Skate Park. Xander and his scooter have a total mass of 50 kg. The net force acting on Xander and the scooter is 25N. What is Xander's acceleration?
Hello,
QUESTION)According to the 2nd Newton's law,
✔ We have : F = m x a ⇔ a = F/m; with F in N, m in kg, a in m/s²
a = 25/50a =0.5 m/s²Therefore Xander's acceleration is 0.5 m/s².
The total mass of Xander and his scooter is 50 kg and the net force acted due to Xander and his scooter is 25 N then the acceleration will be 0.5 m/s².
What is Acceleration?Acceleration is the rate at which the speed and orientation of a moving object change over time. When a spot or object moves faster or slower along a straight line, it is said to be accelerated. Even though the speed is constant, motion on a circle accelerates so because the direction is always shifting. Both by and to acceleration for all other types of motion.
It is a vector quantity because it has both magnitude and direction.
As per the given information provided by the question,
Mass, m = 50 kg
Force, F = 25 N
F = ma
25 N = 50 × a
a = 25/50
a = 0.5 m/s².
Therefore, the acceleration of Xander's acceleration will be 0.5 m/s²
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A goose flying south for the winter travels 55 miles directly south east (45 degrees) and then flies at an angle of 35 degrees Northeast for 75 miles. How far and in what direction did the goose travel?
Answer:
Part A
The distance from the start point the goose travels is approximately 84.96 miles
Part B
The direction the goose travel is approximately 71° Northeast
Explanation:
Part A
The distances the goose flies is given as follows;
The distance directly 45 degrees southeast the goose travels, AB = 55 miles
The distance Northeast the goose travels, BC = 75 miles
The angle Northeast the goose travels = 35°
From the attached drawing of the path the goose travels, we have, by cosine rule, the following relation;
a² = b² + c² - 2·b·c·cos(A)
Therefore, we have;
The length of side [tex]\overline{AC}[/tex]² = 55² + 75² - 2 × 55 × 75 × cos(80°) = 7217.40253425
[tex]\overline{AC}[/tex] = √(7217.40253425) ≈ 84.9552972701
The distance from the start point the goose travels ≈ 84.96 miles
Part B
By sine rule, we have;
75/(sin(A)) = [tex]\overline{AC}[/tex]/(sin(80°))
sin(A) = (75/[tex]\overline{AC}[/tex]) × (sin(80°)
∴ sin(A) = (75/84.9552972701) × (sin(80°) = 0.8694052016
∠A = arcsin(0.8694052016) = 60.3895991264° ≈ 60.4°
The direction the goose travel = 180 - 64 - 45 = 71°
∴ The direction the goose travel =≈ 71° Northeast
A disturbance that generates a wave may be a simple pulse or shock
True or false
Answer:
That would be true.
-- a bell starts ringing (wave) when you tap it (simple pulse)
-- a pond starts rippling (wave) when a stone drops in (simple shock)
-- a guitar strings starts waving when you pluck it
R. Una bailarina gira con una frecuencia de 1hz y momento de inercia i = 28.14kg . M2. Calcule su velocidad de giro cuando disminuye su momento de inercia a la mitad.
Answer:
w = 4π rad / s
Explanation:
When the dancer is turning, the body is isolated so the angular momentum is conserved.
initial
L₀ = I₀ w₀
final
L_f = I w
in this case it indicates that the initial moment is Io = 28.14 kg m² and the final moment is half
I = I₀ / 2
frequency and angular velocity are related
w = 2π f
w = 2π 1
wo = 2π rad / s
how angular momentum is conserved
L₀ = L_f
I₀ w₀ = I w
w = [tex]\frac{I_o}{I}[/tex] w₀
let's calculate
w = 2 2π
w = 4π rad / s
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Please use 3 content related sentences. (
Answer:
The positive ball would go first to the negatively charged plate.
Explanation:
After which, it would hold a more negative charge. Due to the negative charge, it would travel towards the positive plate. Thereby, it would transfer negative electrons to the positive plate once more. In doing so, it would transfer positive protons to the negative plate. After which, it would hold more negative electrons and be drawn towards the positive plate once more. The Process would continue until the once-positive and once-negative became neutral ( and were discharged.) Additionally, the ball hanging on the insulator thread would also be neutral and discharged.
The slope of a distance-time graph will give
Wheel and axle gizmos
Answers;
Explanation:
Wheel and axle gizmos answer key
Is this right? Please help me. ITS SOCIOLOGY!!
Answer:
i think so
Explanation:
4. Explain how energy is transformed in a spring.
Answer:
As spring falls in a vertical plane, the change in gravitational potential energy is transformed to elastic potential energy.
Explanation:
To calculate the spring constant, Hooke's law was used, as well as potential energy to calculate the gravitational and elastic potential energy.
Explain with reason that when sunlight is focused on a piece of paper with the help of a convex len the paper will burn.
Answer:
Convex lenses concentrates the light energy to one spot on the paper so that the heat energy accumulates on that one small spot of paper. ... As the heat increases, combustion will occur when the spot becomes too hot and the paper will burn.
Explanation:
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