if fluorine is neutral what would its atomic mass number, number of protons, number of neutrons, and number of electrons be
Answer:
Fluorine is the 9th element of the periodic table. If its Neutral... It'll have an atomic mass of 19. Also Since its neutral... Number of protons and Electrons will be the same which is 9. Now the Neutron number is the Mass number - The atomic no = 19-9 = 10Neutrons
"Heat conduction to skin": Suppose 175 W of heat flows by conduction from the blood capillaries beneath the skin to the body's surface area of 1.5 m2. If the temperature difference is 0.70°C, estimate the average distance of capillaries below the skin surface.
Answer:
Explanation:
Thermal conductivity of human skin K = 21 W / m²
Formula for heat conduction
Q = KA ( θ₂ - θ₁) / d
A is surface area , θ₂ - θ₁ is temperature difference , d is thickness .
Putting the values
175 = 21 x 1.5 x .70 / d
d = .126 m
= 12.6 cm .
here is an acceleration vs. time graph. what is the change in velocity between 2s and 4s?
Explanation:
From 2s, velocity increased gradually up to 4s
You receive a severe, bleeding injury to your right toe! What circuit of the cardiovascular system is most affected?
A.Pulmonary circuit
B.·Systemic circuit
Answer: A
Explanation:
Pulmonary - is lungs
Systemic - is body system
In a certain material, a beam of monochromatic light (f=5.09 × 10^14 Hz) has a speed of 2.04× 10^8 meters per second. The material could be
Question 14 options:
crown glass (n=1.52)
flint glass (n=1.66)
glycerol (n=1.47)
water (n=1.33)
Answer:
The Answer to question 14 is : glycerol (n=1.47)
The material should be considered as the glycerol (n=1.47).
Calculation of the material:Since
a beam of monochromatic light (f=5.09 × 10^14 Hz) has a speed of 2.04× 10^8 meters per second.
Now the material should be
= 3*10^8 / 2.04× 10^8
= 1.47
Hence, The material should be considered as the glycerol (n=1.47).
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An object rolls east at a steady speed of 12 m/s for 3.0 seconds. What distance did it travel?
O A. 36 m
o B. 24 m
O C. 18 m
O D. 7.0 m
Answer:
[tex]\boxed {\boxed {\sf A. \ 36 \ m}}[/tex]
Explanation:
The distance an object travels is the product of its speed and time.
[tex]d=s \times t[/tex]
The object's speed is 12 meters per second and the time is 3 seconds.
s= 12 m/s t= 3 sSubstitute the values into the formula.
[tex]d= 12 \ m/s \times 3 \ s[/tex]
Multiply. Note that the units of seconds will cancel, so we are left with meters as our units.
[tex]d= 12 \ m * 3[/tex]
[tex]d= 36 \ m[/tex]
The object travels a distance of 36 meters and choice A is correct.
number of protons and electrons and atomic mass for a given element
Explanation:
You can simply subtract the atomic number from the mass number in order to find the number of neutrons. If the atom is neutral, the number of electrons will be equal to the number of protons.
Remember!
1. Your mass number is the total number of neutrons and protons within the atom.
2. Your atomic number is the amount of protons within the atom.
3. For neutral atoms, the electron number is the same as the atomic number.
Three 7-ohm resistors are connected in parallel with an ideal 12-volt battery. What is the equivalent resistance of the circuit?
Answer:
Equivalent Resistance of Resistors in Parallel is
1/R = 1/r1 + 1/r2 .....
1/R = 1/7 + 1/7 + 1/7
R= 7/3
R=2.33ohms
2ZnS plus 2O2 yields 2ZnO plus SO2 what is number in each category and is it balanced or unbalanced
Answer:
2 ZnS + 3O2 ---> 2ZnO + 2 SO2
Explanation:
2 ZnS + 2O2 ---> 2ZnO + SO2
There are 2 Zn atom on the LHS and 2 Zn on the RHS. Hence the Zn is balanced on both sides of the equation.
There are two S atom on the LHS but there is only one S atom on the RHS.
Hence we will balance the S atoms
2 ZnS + 2O2 ---> 2ZnO + 2 SO2
Now the oxygen is unbalanced as there are three oxygen molecule on the RHS but only two on the LHS.
Hence, the balanced equation would be
2 ZnS + 3O2 ---> 2ZnO + 2 SO2
What object currently has the most gravitational potential energy?
A, B, C, or D
Answer:
A
Explanation:
this because
gravitational potential energy = mass x height x gravitational field strength
so let's assume mass is 2 kg and gravitational field strength is 10 N /kg
so when height is very low, take it as 3 m
gravitational potential energy= 2 x 3 x 10 = 60 j
but when height is 6m
gravitational potential energy = 2 x 6 x 10 = 120 j
so when the height is the greatest, the gravitational potential energy is the highest
so A is the heighest so it has the highest gravitational potential energy.
hope this helps
please mark it brainliest :D
How can I become an astronaut I'm currently 13 urs old
PLEASE HELP, ASAP, Thank you!
Answer:
Taking moments about O:
W cos theta * 1.18 = P sin theta * (1.18 + .47)
Counterclockwise torque = Clockwise torque
W / P = 1.40 sin theta / cos theta = 1.40 tan theta
Or theta = tan^-1 (.72 W / P)
What creates the energy of the Sun?
A. gravitational pull from its core
B. chemical reactions
C. nuclear fusion of hydrogen atoms
D. movement of magnetic materials in the core
Answer:
C
Explanation:
During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom.
Which of the following statements is true of the strong nuclear force?
A. It repels neutral charges
B. It holds protons and neutrons together
C. It acts over very great distances
D. It is much weaker than gravitational forces
Explanation:
it holds protons and neutrons together
Strong nuclear force holds protons and neutrons together.
What is protons?Proton is a subatomic particle with a positive electric charge.
What is neutrons?Neutrons is a subatomic particle of about the same mass as a proton but without an electric charge.
What is nuclear force?The nuclear force is a force that acts between the protons and neutrons of atoms.
What is strong nuclear force?The strong nuclear force is created between nucleons by the exchange of particles called mesons. It is stronger than the force of gravity as it binds the fundamental particles to form large particle.
Strong nuclear force is strongest force in nature. So, it is much stronger than gravitational forces. It binds the neutral charges i.e. neutron instead of repelling them. It is a short range force so it can not act over very large distances.
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A force is applied to a 12 kg box. The force is applied parallel to the motion of the box. Determine the force acting on the box if it moves 22 meters and increases the box’s speed from 10 m/s to 25 m/s.
Answer:
Force = 143.16 Newton
Explanation:
Given the following data;
Distance, S = 22 m
Initial velocity, U = 10 m/s
Final velocity, V = 25 m/s
Mass = 12 kg
To find the force acting on the box;
First of all, we would determine the acceleration of the box using the third equation of motion;
V² = U² + 2aS
25² = 10² + 2*a*22
625 = 100 + 44a
625 - 100 = 44a
525 = 44a
Acceleration, a = 525/44
Acceleration, a = 11.93 m/s²
Next, we find the force;
Force = mass * acceleration
Force = 12 * 11.93
Force = 143.16 Newton
What is the electric field at a point
0.300 m to the right of a
-4.77*10^-9 C charge?
Include a + or - sign to indicate the
direction of the field.
Answer:
E = -477 N/C
Explanation:
Given that,
Charge, [tex]q=-4.77\times 10^{-9}\ C[/tex]
We need to find the electric field at a point 0.3 m to the right of the charge.
We know that the electric field at a distance r is given by :
[tex]E=\dfrac{kq}{r^2}\\\\E=\dfrac{9\times 10^9\times 4.77\times 10^{-9}}{(0.3)^2}\\\\E=-477\ N/C[/tex]
So, the electric field is -477 N/C.
If an element forms a 1-ion, in which group of the periodic table would you
expect to find it?
A. 17
Ο Ο
B. 1
C. 2
Ο Ο
D. 18
(It’s A. 17)
why are the layers of the earth in the order that they are in?
Answer:
Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
Explanation:
Please Help!!!!
Your Best friend gets on a ship and travels away fast. They return 10.0 years later and I’ve only aged 4.00 years. How fast was your friend traveling? Give your answer as ex. 0.5c
Answer:
v = 0.92 c
Explanation:
Here, we will use the time dilation formula from Einstein's theory of relativity to find the speed of traveling of the friend:
[tex]t =\frac{t_o}{\sqrt{1-\frac{v^2}{c^2}}} \\\\\\\sqrt{1-\frac{v^2}{c^2}}=\frac{t_o}{t}\\\\[/tex]
where,
v = speed of traveling = ?
c = speed of light
t = time of return = 10 years
t₀ = time passed on earth = 4 years
Therefore,
[tex]\sqrt{1-\frac{v^2}{c^2}} = \frac{4\ years}{10\ years}\\\\ 1-\frac{v^2}{c^2}=(\frac{2}{5})^2\\\\\frac{v^2}{c^2} = 1-\frac{4}{25}\\\\\frac{v^2}{c^2} = \frac{21}{25}\\\\v^2 = 0.84c^2\\\\[/tex]
v = 0.92 c
Which image illustrates diffraction
The image that illustrates diffraction is the one in which ray of light was passing through a narrow opening created by closing the fingers. Third image.
Understanding DiffractionDiffraction refers to the bending or spreading of waves as they encounter an obstacle or pass through an aperture. It is a characteristic behavior exhibited by different types of waves, such as light, sound, or water waves.
When waves encounter an obstacle or pass through a narrow opening, they diffract and change direction. This occurs because waves exhibit wavefront interference, where different parts of the wave interact with each other. The interference causes constructive or destructive interference, resulting in the bending or spreading of the wave.
In the case of light, diffraction can be observed when light passes through a narrow slit or encounters an edge of an object. This phenomenon leads to the spreading of light waves, creating patterns of light and dark regions known as diffraction patterns.
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Which characteristic does Earth share with the other
planets in our Solar System?
Select one:
A.They all have oceans.
B.They all orbit the Sun.
C.They all have rocky surfaces.
D.They all have one moon.
Answer: B) They all orbit the sun
Explanation:
Please help it’s multiple choice
Explanation:
the answer is object with more mass have more kinetic energy
K/E=(1/2)mv²
it cant be the last option because it was stated in the question that the velocity is the same
A certain FM radio station broadcasts electromagnetic waves at a frequency of 60,500,000 Hz. These waves travel at a velocity of 300,000,000 m/s. What is the wavelength of these radio waves?
A. 4.96 m
B.0.2 m
C. 360,500,000 m
Answer:
Wavelength of radio wave = 4.96 meter (Approx.)
Explanation:
Given:
Frequency of radio wave = 60,500,000 Hz
Velocity of radio waves = 300,000,000 m/s
Find:
Wavelength of radio wave
Computation:
Wavelength = Velocity / frequency
Wavelength of radio wave = Velocity of radio waves / Frequency of radio wave
Wavelength of radio wave = 300,000,000 / 60,500,000
Wavelength of radio wave = 4.9586
Wavelength of radio wave = 4.96 meter (Approx.)
What is the magnitude of the electric field strength at a point where an electron
experiences an electrostatic force of 8 x 10^ 17 N? NO LINKS.
1) 5 x 10^36 N/C
2) 0.76 N/C
3) 8 x 10^17 N/C
4) 0.002 N/C
Answer:
E = F/ q 8x10^17÷ 1.6 x 10^ - 19
Explanation:
5x 10^36N\c A is answer
Which of the following has greater kinetic energy?
(a). A 10 g meteor hurtling (Moving at greater speed) through the Earth’s atmosphere at 5.0 km s−1. (b). A 65 kg jogger running at 5.0 m s−1.
please help me
Which statement is true about liquids? They are invisible.
They are always the same temperature.
They retain their shape.
They take the shape of their container.
Answer:
They take the shape of their container.
I think since they move around and fit into anything perfectly.
Electrons made to vibrate to and fro at a few hundred thousand hertz emit radio waves. What class of waves is emitted from electron vibrations of a few million billion hertz
Answer:
this frequency is in the near UV range
Explanation:
The accelerated movement of a charge creates an electromagnetic wave, the speed of the wave is the speed of light
c = λ f
the emitted frequency is f = 10⁶ 10⁹ Hz = 10¹⁵5 hz,
light of this frequency is in the near UV range
How would a person who believes in the geocentric solar
system model explain the movement of the sun across
the sky during the day?
Select one:
A.The sun is revolving around a stationary Earth.
B.Earth is revolving around a stationary sun.
C.Both Earth and the sun are stationary; the movement is
due to Earth's rotation.
D.The sun is revolving around the moon, which in turn is
revolving around Earth.
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías
Answer:
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos.
What Dos resistencias de 30 y 20 Ω se conectan?Dos resistencias de 30 y 20 Ω se conectan en seria a un generador que tiene una diferencia de potencial de 20 V entre sus bornes. a. Determina la resistencia equivalente de la asociación b. Dibuja el circuito y coloca un amperímetro que indique el valor de la intensidad de la corriente y unos voltímetros que muestren la diferencia de potencial entre los extremos de las resistencias.
Un efecto del paso de corriente es que parte de la energía del sistema se transforma en calor y aumenta la temperatura del circuito, lo que da lugar al efecto Joule. Ahora, imagina que un foco tiene una resistencia de 60 Ω (ohm) y consume una corriente de 2 A. Calcula el calor que dicho foco puede generar durante 1 minuto; expresa el resultado en calorías y kilocalorías. Recuerda utilizar la siguiente fórmula.
Therefore, Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos.
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can you explain the three main important reason why we use machine
Answer:
HERE IS YOUR ANSWER
Explanation:
1. The machines makes pur life easier.
2. It makes us do our works faster.
3. It does all the works that are harder for us.
Hope it helps you.
Explanation:
First of all some do most of the work for us
Second, us humans are quite lazy
Third, it makes it quite easier in life